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nest-open-source / nest-learning-thermostat / 5.1.7 / nspr / refs/heads/master / . / nspr-4.8.6 / mozilla / nsprpub / pr / src / md / windows / ntio.c
blob: 46535030850e0353adb73b4e804181143975bba6 [file] [log] [blame]
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Masayuki Nakano <masayuki@d-toybox.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* Windows NT IO module
*
* This module handles IO for LOCAL_SCOPE and GLOBAL_SCOPE threads.
* For LOCAL_SCOPE threads, we're using NT fibers. For GLOBAL_SCOPE threads
* we're using NT-native threads.
*
* When doing IO, we want to use completion ports for optimal performance
* with fibers. But if we use completion ports for all IO, it is difficult
* to project a blocking model with GLOBAL_SCOPE threads. To handle this
* we create an extra thread for completing IO for GLOBAL_SCOPE threads.
* We don't really want to complete IO on a separate thread for LOCAL_SCOPE
* threads because it means extra context switches, which are really slow
* on NT... Since we're using a single completion port, some IO will
* be incorrectly completed on the GLOBAL_SCOPE IO thread; this will mean
* extra context switching; but I don't think there is anything I can do
* about it.
*/
#include "primpl.h"
#include "pprmwait.h"
#include <direct.h>
#include <mbstring.h>
static HANDLE _pr_completion_port;
static PRThread *_pr_io_completion_thread;
#define RECYCLE_SIZE 512
static struct _MDLock _pr_recycle_lock;
static PRInt32 _pr_recycle_INET_array[RECYCLE_SIZE];
static PRInt32 _pr_recycle_INET_tail = 0;
static PRInt32 _pr_recycle_INET6_array[RECYCLE_SIZE];
static PRInt32 _pr_recycle_INET6_tail = 0;
__declspec(thread) PRThread *_pr_io_restarted_io = NULL;
DWORD _pr_io_restartedIOIndex; /* The thread local storage slot for each
* thread is initialized to NULL. */
PRBool _nt_version_gets_lockfile_completion;
struct _MDLock _pr_ioq_lock;
extern _MDLock _nt_idleLock;
extern PRCList _nt_idleList;
extern PRUint32 _nt_idleCount;
#define CLOSE_TIMEOUT PR_SecondsToInterval(5)
/*
* NSPR-to-NT access right mapping table for files.
*/
static DWORD fileAccessTable[] = {
FILE_GENERIC_READ,
FILE_GENERIC_WRITE,
FILE_GENERIC_EXECUTE
};
/*
* NSPR-to-NT access right mapping table for directories.
*/
static DWORD dirAccessTable[] = {
FILE_GENERIC_READ,
FILE_GENERIC_WRITE|FILE_DELETE_CHILD,
FILE_GENERIC_EXECUTE
};
static PRBool IsPrevCharSlash(const char *str, const char *current);
#define _NEED_351_FILE_LOCKING_HACK
#ifdef _NEED_351_FILE_LOCKING_HACK
#define _PR_LOCAL_FILE 1
#define _PR_REMOTE_FILE 2
PRBool IsFileLocalInit();
PRInt32 IsFileLocal(HANDLE hFile);
#endif /* _NEED_351_FILE_LOCKING_HACK */
static PRInt32 _md_MakeNonblock(HANDLE);
static PROsfd _nt_nonblock_accept(PRFileDesc *fd, struct sockaddr *addr, int *addrlen, PRIntervalTime);
static PRInt32 _nt_nonblock_connect(PRFileDesc *fd, struct sockaddr *addr, int addrlen, PRIntervalTime);
static PRInt32 _nt_nonblock_recv(PRFileDesc *fd, char *buf, int len, int flags, PRIntervalTime);
static PRInt32 _nt_nonblock_send(PRFileDesc *fd, char *buf, int len, PRIntervalTime);
static PRInt32 _nt_nonblock_writev(PRFileDesc *fd, const PRIOVec *iov, int size, PRIntervalTime);
static PRInt32 _nt_nonblock_sendto(PRFileDesc *, const char *, int, const struct sockaddr *, int, PRIntervalTime);
static PRInt32 _nt_nonblock_recvfrom(PRFileDesc *, char *, int, struct sockaddr *, int *, PRIntervalTime);
/*
* We cannot associate a fd (a socket) with an I/O completion port
* if the fd is nonblocking or inheritable.
*
* Nonblocking socket I/O won't work if the socket is associated with
* an I/O completion port.
*
* An inheritable fd cannot be associated with an I/O completion port
* because the completion notification of async I/O initiated by the
* child process is still posted to the I/O completion port in the
* parent process.
*/
#define _NT_USE_NB_IO(fd) \
((fd)->secret->nonblocking || (fd)->secret->inheritable == _PR_TRI_TRUE)
/*
* UDP support
*
* UDP is supported on NT by the continuation thread mechanism.
* The code is borrowed from ptio.c in pthreads nspr, hence the
* PT and pt prefixes. This mechanism is in fact general and
* not limited to UDP. For now, only UDP's recvfrom and sendto
* go through the continuation thread if they get WSAEWOULDBLOCK
* on first try. Recv and send on a connected UDP socket still
* goes through asychronous io.
*/
#define PT_DEFAULT_SELECT_MSEC 100
typedef struct pt_Continuation pt_Continuation;
typedef PRBool (*ContinuationFn)(pt_Continuation *op, PRInt16 revent);
typedef enum pr_ContuationStatus
{
pt_continuation_sumbitted,
pt_continuation_inprogress,
pt_continuation_abort,
pt_continuation_done
} pr_ContuationStatus;
struct pt_Continuation
{
/* These objects are linked in ascending timeout order */
pt_Continuation *next, *prev; /* self linked list of these things */
/* The building of the continuation operation */
ContinuationFn function; /* what function to continue */
union { SOCKET osfd; } arg1; /* #1 - the op's fd */
union { void* buffer; } arg2; /* #2 - primary transfer buffer */
union { PRIntn amount; } arg3; /* #3 - size of 'buffer' */
union { PRIntn flags; } arg4; /* #4 - read/write flags */
union { PRNetAddr *addr; } arg5; /* #5 - send/recv address */
PRIntervalTime timeout; /* representation of the timeout */
PRIntn event; /* flags for select()'s events */
/*
** The representation and notification of the results of the operation.
** These function can either return an int return code or a pointer to
** some object.
*/
union { PRIntn code; void *object; } result;
PRIntn syserrno; /* in case it failed, why (errno) */
pr_ContuationStatus status; /* the status of the operation */
PRCondVar *complete; /* to notify the initiating thread */
};
static struct pt_TimedQueue
{
PRLock *ml; /* a little protection */
PRThread *thread; /* internal thread's identification */
PRCondVar *new_op; /* new operation supplied */
PRCondVar *finish_op; /* an existing operation finished */
PRUintn op_count; /* number of operations in the list */
pt_Continuation *head, *tail; /* head/tail of list of operations */
pt_Continuation *op; /* timed operation furthest in future */
PRIntervalTime epoch; /* the epoch of 'timed' */
} pt_tq;
#if defined(DEBUG)
static struct pt_debug_s
{
PRIntn predictionsFoiled;
PRIntn pollingListMax;
PRIntn continuationsServed;
} pt_debug;
#endif /* DEBUG */
static void ContinuationThread(void *arg);
static PRInt32 pt_SendTo(
SOCKET osfd, const void *buf,
PRInt32 amount, PRInt32 flags, const PRNetAddr *addr,
PRIntn addrlen, PRIntervalTime timeout);
static PRInt32 pt_RecvFrom(SOCKET osfd, void *buf, PRInt32 amount,
PRInt32 flags, PRNetAddr *addr, PRIntn *addr_len, PRIntervalTime timeout);
/* The key returned from GetQueuedCompletionStatus() is used to determine what
* type of completion we have. We differentiate between IO completions and
* CVAR completions.
*/
#define KEY_IO 0xaaaaaaaa
#define KEY_CVAR 0xbbbbbbbb
PRInt32
_PR_MD_PAUSE_CPU(PRIntervalTime ticks)
{
int awoken = 0;
unsigned long bytes, key;
int rv;
LPOVERLAPPED olp;
_MDOverlapped *mdOlp;
PRUint32 timeout;
if (_nt_idleCount > 0) {
PRThread *deadThread;
_MD_LOCK(&_nt_idleLock);
while( !PR_CLIST_IS_EMPTY(&_nt_idleList) ) {
deadThread = _PR_THREAD_PTR(PR_LIST_HEAD(&_nt_idleList));
PR_REMOVE_LINK(&deadThread->links);
PR_ASSERT(deadThread->state == _PR_DEAD_STATE);
/* XXXMB - cleanup to do here? */
if ( !_PR_IS_NATIVE_THREAD(deadThread) ){
/* Spinlock while user thread is still running.
* There is no way to use a condition variable here. The thread
* is dead, and we have to wait until we switch off the dead
* thread before we can kill the fiber completely.
*/
while ( deadThread->no_sched)
;
DeleteFiber(deadThread->md.fiber_id);
}
memset(deadThread, 0xa, sizeof(PRThread)); /* debugging */
if (!deadThread->threadAllocatedOnStack)
PR_DELETE(deadThread);
_nt_idleCount--;
}
_MD_UNLOCK(&_nt_idleLock);
}
if (ticks == PR_INTERVAL_NO_TIMEOUT)
#if 0
timeout = INFINITE;
#else
/*
* temporary hack to poll the runq every 5 seconds because of bug in
* native threads creating user threads and not poking the right cpu.
*
* A local thread that was interrupted is bound to its current
* cpu but there is no easy way for the interrupter to poke the
* right cpu. This is a hack to poll the runq every 5 seconds.
*/
timeout = 5000;
#endif
else
timeout = PR_IntervalToMilliseconds(ticks);
/*
* The idea of looping here is to complete as many IOs as possible before
* returning. This should minimize trips to the idle thread.
*/
while(1) {
rv = GetQueuedCompletionStatus(
_pr_completion_port,
&bytes,
&key,
&olp,
timeout);
if (rv == 0 && olp == NULL) {
/* Error in GetQueuedCompetionStatus */
if (GetLastError() != WAIT_TIMEOUT) {
/* ARGH - what can we do here? Log an error? XXXMB */
return -1;
} else {
/* If awoken == 0, then we just had a timeout */
return awoken;
}
}
if (olp == NULL)
return 0;
mdOlp = (_MDOverlapped *)olp;
if (mdOlp->ioModel == _MD_MultiWaitIO) {
PRRecvWait *desc;
PRWaitGroup *group;
PRThread *thred = NULL;
PRMWStatus mwstatus;
desc = mdOlp->data.mw.desc;
PR_ASSERT(desc != NULL);
mwstatus = rv ? PR_MW_SUCCESS : PR_MW_FAILURE;
if (InterlockedCompareExchange((PVOID *)&desc->outcome,
(PVOID)mwstatus, (PVOID)PR_MW_PENDING)
== (PVOID)PR_MW_PENDING) {
if (mwstatus == PR_MW_SUCCESS) {
desc->bytesRecv = bytes;
} else {
mdOlp->data.mw.error = GetLastError();
}
}
group = mdOlp->data.mw.group;
PR_ASSERT(group != NULL);
_PR_MD_LOCK(&group->mdlock);
PR_APPEND_LINK(&mdOlp->data.mw.links, &group->io_ready);
PR_ASSERT(desc->fd != NULL);
NT_HashRemoveInternal(group, desc->fd);
if (!PR_CLIST_IS_EMPTY(&group->wait_list)) {
thred = _PR_THREAD_CONDQ_PTR(PR_LIST_HEAD(&group->wait_list));
PR_REMOVE_LINK(&thred->waitQLinks);
}
_PR_MD_UNLOCK(&group->mdlock);
if (thred) {
if (!_PR_IS_NATIVE_THREAD(thred)) {
int pri = thred->priority;
_PRCPU *lockedCPU = _PR_MD_CURRENT_CPU();
_PR_THREAD_LOCK(thred);
if (thred->flags & _PR_ON_PAUSEQ) {
_PR_SLEEPQ_LOCK(thred->cpu);
_PR_DEL_SLEEPQ(thred, PR_TRUE);
_PR_SLEEPQ_UNLOCK(thred->cpu);
_PR_THREAD_UNLOCK(thred);
thred->cpu = lockedCPU;
thred->state = _PR_RUNNABLE;
_PR_RUNQ_LOCK(lockedCPU);
_PR_ADD_RUNQ(thred, lockedCPU, pri);
_PR_RUNQ_UNLOCK(lockedCPU);
} else {
/*
* The thread was just interrupted and moved
* from the pause queue to the run queue.
*/
_PR_THREAD_UNLOCK(thred);
}
} else {
_PR_THREAD_LOCK(thred);
thred->state = _PR_RUNNABLE;
_PR_THREAD_UNLOCK(thred);
ReleaseSemaphore(thred->md.blocked_sema, 1, NULL);
}
}
} else {
PRThread *completed_io;
PR_ASSERT(mdOlp->ioModel == _MD_BlockingIO);
completed_io = _PR_THREAD_MD_TO_PTR(mdOlp->data.mdThread);
completed_io->md.blocked_io_status = rv;
if (rv == 0)
completed_io->md.blocked_io_error = GetLastError();
completed_io->md.blocked_io_bytes = bytes;
if ( !_PR_IS_NATIVE_THREAD(completed_io) ) {
int pri = completed_io->priority;
_PRCPU *lockedCPU = _PR_MD_CURRENT_CPU();
/* The KEY_CVAR notification only occurs when a native thread
* is notifying a user thread. For user-user notifications
* the wakeup occurs by having the notifier place the thread
* on the runq directly; for native-native notifications the
* wakeup occurs by calling ReleaseSemaphore.
*/
if ( key == KEY_CVAR ) {
PR_ASSERT(completed_io->io_pending == PR_FALSE);
PR_ASSERT(completed_io->io_suspended == PR_FALSE);
PR_ASSERT(completed_io->md.thr_bound_cpu == NULL);
/* Thread has already been deleted from sleepQ */
/* Switch CPU and add to runQ */
completed_io->cpu = lockedCPU;
completed_io->state = _PR_RUNNABLE;
_PR_RUNQ_LOCK(lockedCPU);
_PR_ADD_RUNQ(completed_io, lockedCPU, pri);
_PR_RUNQ_UNLOCK(lockedCPU);
} else {
PR_ASSERT(key == KEY_IO);
PR_ASSERT(completed_io->io_pending == PR_TRUE);
_PR_THREAD_LOCK(completed_io);
completed_io->io_pending = PR_FALSE;
/* If io_suspended is true, then this IO has already resumed.
* We don't need to do anything; because the thread is
* already running.
*/
if (completed_io->io_suspended == PR_FALSE) {
if (completed_io->flags & (_PR_ON_SLEEPQ|_PR_ON_PAUSEQ)) {
_PR_SLEEPQ_LOCK(completed_io->cpu);
_PR_DEL_SLEEPQ(completed_io, PR_TRUE);
_PR_SLEEPQ_UNLOCK(completed_io->cpu);
_PR_THREAD_UNLOCK(completed_io);
/*
* If an I/O operation is suspended, the thread
* must be running on the same cpu on which the
* I/O operation was issued.
*/
PR_ASSERT(!completed_io->md.thr_bound_cpu ||
(completed_io->cpu == completed_io->md.thr_bound_cpu));
if (!completed_io->md.thr_bound_cpu)
completed_io->cpu = lockedCPU;
completed_io->state = _PR_RUNNABLE;
_PR_RUNQ_LOCK(completed_io->cpu);
_PR_ADD_RUNQ(completed_io, completed_io->cpu, pri);
_PR_RUNQ_UNLOCK(completed_io->cpu);
} else {
_PR_THREAD_UNLOCK(completed_io);
}
} else {
_PR_THREAD_UNLOCK(completed_io);
}
}
} else {
/* For native threads, they are only notified through this loop
* when completing IO. So, don't worry about this being a CVAR
* notification, because that is not possible.
*/
_PR_THREAD_LOCK(completed_io);
completed_io->io_pending = PR_FALSE;
if (completed_io->io_suspended == PR_FALSE) {
completed_io->state = _PR_RUNNABLE;
_PR_THREAD_UNLOCK(completed_io);
rv = ReleaseSemaphore(completed_io->md.blocked_sema,
1, NULL);
PR_ASSERT(0 != rv);
} else {
_PR_THREAD_UNLOCK(completed_io);
}
}
}
awoken++;
timeout = 0; /* Don't block on subsequent trips through the loop */
}
/* never reached */
return 0;
}
static PRStatus
_native_thread_md_wait(PRThread *thread, PRIntervalTime ticks)
{
DWORD rv;
PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ?
INFINITE : PR_IntervalToMilliseconds(ticks);
/*
* thread waiting for a cvar or a joining thread
*/
rv = WaitForSingleObject(thread->md.blocked_sema, msecs);
switch(rv) {
case WAIT_OBJECT_0:
return PR_SUCCESS;
break;
case WAIT_TIMEOUT:
_PR_THREAD_LOCK(thread);
PR_ASSERT (thread->state != _PR_IO_WAIT);
if (thread->wait.cvar != NULL) {
PR_ASSERT(thread->state == _PR_COND_WAIT);
thread->wait.cvar = NULL;
thread->state = _PR_RUNNING;
_PR_THREAD_UNLOCK(thread);
} else {
/* The CVAR was notified just as the timeout
* occurred. This left the semaphore in the
* signaled state. Call WaitForSingleObject()
* to clear the semaphore.
*/
_PR_THREAD_UNLOCK(thread);
rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE);
PR_ASSERT(rv == WAIT_OBJECT_0);
}
return PR_SUCCESS;
break;
default:
return PR_FAILURE;
break;
}
return PR_SUCCESS;
}
PRStatus
_PR_MD_WAIT(PRThread *thread, PRIntervalTime ticks)
{
DWORD rv;
if (_native_threads_only) {
return(_native_thread_md_wait(thread, ticks));
}
if ( thread->flags & _PR_GLOBAL_SCOPE ) {
PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ?
INFINITE : PR_IntervalToMilliseconds(ticks);
rv = WaitForSingleObject(thread->md.blocked_sema, msecs);
switch(rv) {
case WAIT_OBJECT_0:
return PR_SUCCESS;
break;
case WAIT_TIMEOUT:
_PR_THREAD_LOCK(thread);
if (thread->state == _PR_IO_WAIT) {
if (thread->io_pending == PR_TRUE) {
thread->state = _PR_RUNNING;
thread->io_suspended = PR_TRUE;
_PR_THREAD_UNLOCK(thread);
} else {
/* The IO completed just at the same time the timeout
* occurred. This left the semaphore in the signaled
* state. Call WaitForSingleObject() to clear the
* semaphore.
*/
_PR_THREAD_UNLOCK(thread);
rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE);
PR_ASSERT(rv == WAIT_OBJECT_0);
}
} else {
if (thread->wait.cvar != NULL) {
PR_ASSERT(thread->state == _PR_COND_WAIT);
thread->wait.cvar = NULL;
thread->state = _PR_RUNNING;
_PR_THREAD_UNLOCK(thread);
} else {
/* The CVAR was notified just as the timeout
* occurred. This left the semaphore in the
* signaled state. Call WaitForSingleObject()
* to clear the semaphore.
*/
_PR_THREAD_UNLOCK(thread);
rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE);
PR_ASSERT(rv == WAIT_OBJECT_0);
}
}
return PR_SUCCESS;
break;
default:
return PR_FAILURE;
break;
}
} else {
PRInt32 is;
_PR_INTSOFF(is);
_PR_MD_SWITCH_CONTEXT(thread);
}
return PR_SUCCESS;
}
static void
_native_thread_io_nowait(
PRThread *thread,
int rv,
int bytes)
{
int rc;
PR_ASSERT(rv != 0);
_PR_THREAD_LOCK(thread);
if (thread->state == _PR_IO_WAIT) {
PR_ASSERT(thread->io_suspended == PR_FALSE);
PR_ASSERT(thread->io_pending == PR_TRUE);
thread->state = _PR_RUNNING;
thread->io_pending = PR_FALSE;
_PR_THREAD_UNLOCK(thread);
} else {
/* The IO completed just at the same time the
* thread was interrupted. This left the semaphore
* in the signaled state. Call WaitForSingleObject()
* to clear the semaphore.
*/
PR_ASSERT(thread->io_suspended == PR_TRUE);
PR_ASSERT(thread->io_pending == PR_TRUE);
thread->io_pending = PR_FALSE;
_PR_THREAD_UNLOCK(thread);
rc = WaitForSingleObject(thread->md.blocked_sema, INFINITE);
PR_ASSERT(rc == WAIT_OBJECT_0);
}
thread->md.blocked_io_status = rv;
thread->md.blocked_io_bytes = bytes;
rc = ResetEvent(thread->md.thr_event);
PR_ASSERT(rc != 0);
return;
}
static PRStatus
_native_thread_io_wait(PRThread *thread, PRIntervalTime ticks)
{
DWORD rv, bytes;
#define _NATIVE_IO_WAIT_HANDLES 2
#define _NATIVE_WAKEUP_EVENT_INDEX 0
#define _NATIVE_IO_EVENT_INDEX 1
HANDLE wait_handles[_NATIVE_IO_WAIT_HANDLES];
PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ?
INFINITE : PR_IntervalToMilliseconds(ticks);
PR_ASSERT(thread->flags & _PR_GLOBAL_SCOPE);
wait_handles[0] = thread->md.blocked_sema;
wait_handles[1] = thread->md.thr_event;
rv = WaitForMultipleObjects(_NATIVE_IO_WAIT_HANDLES, wait_handles,
FALSE, msecs);
switch(rv) {
case WAIT_OBJECT_0 + _NATIVE_IO_EVENT_INDEX:
/*
* I/O op completed
*/
_PR_THREAD_LOCK(thread);
if (thread->state == _PR_IO_WAIT) {
PR_ASSERT(thread->io_suspended == PR_FALSE);
PR_ASSERT(thread->io_pending == PR_TRUE);
thread->state = _PR_RUNNING;
thread->io_pending = PR_FALSE;
_PR_THREAD_UNLOCK(thread);
} else {
/* The IO completed just at the same time the
* thread was interrupted. This led to us being
* notified twice. Call WaitForSingleObject()
* to clear the semaphore.
*/
PR_ASSERT(thread->io_suspended == PR_TRUE);
PR_ASSERT(thread->io_pending == PR_TRUE);
thread->io_pending = PR_FALSE;
_PR_THREAD_UNLOCK(thread);
rv = WaitForSingleObject(thread->md.blocked_sema,
INFINITE);
PR_ASSERT(rv == WAIT_OBJECT_0);
}
rv = GetOverlappedResult((HANDLE) thread->io_fd,
&thread->md.overlapped.overlapped, &bytes, FALSE);
thread->md.blocked_io_status = rv;
if (rv != 0) {
thread->md.blocked_io_bytes = bytes;
} else {
thread->md.blocked_io_error = GetLastError();
PR_ASSERT(ERROR_IO_PENDING != thread->md.blocked_io_error);
}
rv = ResetEvent(thread->md.thr_event);
PR_ASSERT(rv != 0);
break;
case WAIT_OBJECT_0 + _NATIVE_WAKEUP_EVENT_INDEX:
/*
* I/O interrupted;
*/
#ifdef DEBUG
_PR_THREAD_LOCK(thread);
PR_ASSERT(thread->io_suspended == PR_TRUE);
_PR_THREAD_UNLOCK(thread);
#endif
break;
case WAIT_TIMEOUT:
_PR_THREAD_LOCK(thread);
if (thread->state == _PR_IO_WAIT) {
thread->state = _PR_RUNNING;
thread->io_suspended = PR_TRUE;
_PR_THREAD_UNLOCK(thread);
} else {
/*
* The thread was interrupted just as the timeout
* occurred. This left the semaphore in the signaled
* state. Call WaitForSingleObject() to clear the
* semaphore.
*/
PR_ASSERT(thread->io_suspended == PR_TRUE);
_PR_THREAD_UNLOCK(thread);
rv = WaitForSingleObject(thread->md.blocked_sema, INFINITE);
PR_ASSERT(rv == WAIT_OBJECT_0);
}
break;
default:
return PR_FAILURE;
break;
}
return PR_SUCCESS;
}
static PRStatus
_NT_IO_WAIT(PRThread *thread, PRIntervalTime timeout)
{
PRBool fWait = PR_TRUE;
if (_native_threads_only) {
return(_native_thread_io_wait(thread, timeout));
}
if (!_PR_IS_NATIVE_THREAD(thread)) {
_PR_THREAD_LOCK(thread);
/* The IO may have already completed; if so, don't add to sleepQ,
* since we are already on the runQ!
*/
if (thread->io_pending == PR_TRUE) {
_PR_SLEEPQ_LOCK(thread->cpu);
_PR_ADD_SLEEPQ(thread, timeout);
_PR_SLEEPQ_UNLOCK(thread->cpu);
} else
fWait = PR_FALSE;
_PR_THREAD_UNLOCK(thread);
}
if (fWait)
return _PR_MD_WAIT(thread, timeout);
else
return PR_SUCCESS;
}
/*
* Unblock threads waiting for I/O
* used when interrupting threads
*
* NOTE: The thread lock should held when this function is called.
* On return, the thread lock is released.
*/
void _PR_Unblock_IO_Wait(PRThread *thr)
{
PRStatus rv;
_PRCPU *cpu = thr->cpu;
PR_ASSERT(thr->state == _PR_IO_WAIT);
/*
* A thread for which an I/O timed out or was interrupted cannot be
* in an IO_WAIT state except as a result of calling PR_Close or
* PR_NT_CancelIo for the FD. For these two cases, _PR_IO_WAIT state
* is not interruptible
*/
if (thr->md.interrupt_disabled == PR_TRUE) {
_PR_THREAD_UNLOCK(thr);
return;
}
thr->io_suspended = PR_TRUE;
thr->state = _PR_RUNNABLE;
if (!_PR_IS_NATIVE_THREAD(thr)) {
PRThread *me = _PR_MD_CURRENT_THREAD();
PR_ASSERT(thr->flags & (_PR_ON_SLEEPQ | _PR_ON_PAUSEQ));
_PR_SLEEPQ_LOCK(cpu);
_PR_DEL_SLEEPQ(thr, PR_TRUE);
_PR_SLEEPQ_UNLOCK(cpu);
/*
* this thread will continue to run on the same cpu until the
* I/O is aborted by closing the FD or calling CancelIO
*/
thr->md.thr_bound_cpu = cpu;
PR_ASSERT(!(thr->flags & _PR_IDLE_THREAD));
_PR_AddThreadToRunQ(me, thr);
}
_PR_THREAD_UNLOCK(thr);
rv = _PR_MD_WAKEUP_WAITER(thr);
PR_ASSERT(PR_SUCCESS == rv);
}
/* Resume an outstanding IO; requires that after the switch, we disable */
static PRStatus
_NT_ResumeIO(PRThread *thread, PRIntervalTime ticks)
{
PRBool fWait = PR_TRUE;
if (!_PR_IS_NATIVE_THREAD(thread)) {
if (_pr_use_static_tls) {
_pr_io_restarted_io = thread;
} else {
TlsSetValue(_pr_io_restartedIOIndex, thread);
}
} else {
_PR_THREAD_LOCK(thread);
if (!thread->io_pending)
fWait = PR_FALSE;
thread->io_suspended = PR_FALSE;
_PR_THREAD_UNLOCK(thread);
}
/* We don't put ourselves back on the sleepQ yet; until we
* set the suspended bit to false, we can't do that. Just save
* the sleep time here, and then continue. The restarted_io handler
* will add us to the sleepQ if needed.
*/
thread->sleep = ticks;
if (fWait) {
if (!_PR_IS_NATIVE_THREAD(thread))
return _PR_MD_WAIT(thread, ticks);
else
return _NT_IO_WAIT(thread, ticks);
}
return PR_SUCCESS;
}
PRStatus
_PR_MD_WAKEUP_WAITER(PRThread *thread)
{
if (thread == NULL) {
/* If thread is NULL, we aren't waking a thread, we're just poking
* idle thread
*/
if ( PostQueuedCompletionStatus(_pr_completion_port, 0,
KEY_CVAR, NULL) == FALSE)
return PR_FAILURE;
return PR_SUCCESS;
}
if ( _PR_IS_NATIVE_THREAD(thread) ) {
if (ReleaseSemaphore(thread->md.blocked_sema, 1, NULL) == FALSE)
return PR_FAILURE;
else
return PR_SUCCESS;
} else {
PRThread *me = _PR_MD_CURRENT_THREAD();
/* When a Native thread has to awaken a user thread, it has to poke
* the completion port because all user threads might be idle, and
* thus the CPUs are just waiting for a completion.
*
* XXXMB - can we know when we are truely idle (and not checking
* the runq)?
*/
if ((_PR_IS_NATIVE_THREAD(me) || (thread->cpu != me->cpu)) &&
(!thread->md.thr_bound_cpu)) {
/* The thread should not be in any queue */
PR_ASSERT(thread->queueCount == 0);
if ( PostQueuedCompletionStatus(_pr_completion_port, 0,
KEY_CVAR, &(thread->md.overlapped.overlapped)) == FALSE)
return PR_FAILURE;
}
return PR_SUCCESS;
}
}
void
_PR_MD_INIT_IO()
{
WORD WSAVersion = 0x0101;
WSADATA WSAData;
int err;
OSVERSIONINFO OSversion;
err = WSAStartup( WSAVersion, &WSAData );
PR_ASSERT(0 == err);
_pr_completion_port = CreateIoCompletionPort(INVALID_HANDLE_VALUE,
NULL,
0,
0);
_MD_NEW_LOCK(&_pr_recycle_lock);
_MD_NEW_LOCK(&_pr_ioq_lock);
OSversion.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if (GetVersionEx(&OSversion)) {
_nt_version_gets_lockfile_completion = PR_FALSE;
if (OSversion.dwMajorVersion >= 4) {
_nt_version_gets_lockfile_completion = PR_TRUE;
}
} else
PR_ASSERT(0);
#ifdef _NEED_351_FILE_LOCKING_HACK
IsFileLocalInit();
#endif /* _NEED_351_FILE_LOCKING_HACK */
/*
* UDP support: start up the continuation thread
*/
pt_tq.op_count = 0;
pt_tq.head = pt_tq.tail = NULL;
pt_tq.ml = PR_NewLock();
PR_ASSERT(NULL != pt_tq.ml);
pt_tq.new_op = PR_NewCondVar(pt_tq.ml);
PR_ASSERT(NULL != pt_tq.new_op);
#if defined(DEBUG)
memset(&pt_debug, 0, sizeof(struct pt_debug_s));
#endif
pt_tq.thread = PR_CreateThread(
PR_SYSTEM_THREAD, ContinuationThread, NULL,
PR_PRIORITY_URGENT, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
PR_ASSERT(NULL != pt_tq.thread);
#ifdef DEBUG
/* Doublecheck _pr_filetime_offset's hard-coded value is correct. */
{
SYSTEMTIME systime;
union {
PRTime prt;
FILETIME ft;
} filetime;
BOOL rv;
systime.wYear = 1970;
systime.wMonth = 1;
/* wDayOfWeek is ignored */
systime.wDay = 1;
systime.wHour = 0;
systime.wMinute = 0;
systime.wSecond = 0;
systime.wMilliseconds = 0;
rv = SystemTimeToFileTime(&systime, &filetime.ft);
PR_ASSERT(0 != rv);
PR_ASSERT(filetime.prt == _pr_filetime_offset);
}
#endif /* DEBUG */
_PR_NT_InitSids();
}
/* --- SOCKET IO --------------------------------------------------------- */
/* _md_get_recycled_socket()
* Get a socket from the recycle bin; if no sockets are in the bin,
* create one. The socket will be passed to AcceptEx() as the
* second argument.
*/
static SOCKET
_md_get_recycled_socket(int af)
{
SOCKET rv;
_MD_LOCK(&_pr_recycle_lock);
if (af == AF_INET && _pr_recycle_INET_tail) {
_pr_recycle_INET_tail--;
rv = _pr_recycle_INET_array[_pr_recycle_INET_tail];
_MD_UNLOCK(&_pr_recycle_lock);
return rv;
}
if (af == AF_INET6 && _pr_recycle_INET6_tail) {
_pr_recycle_INET6_tail--;
rv = _pr_recycle_INET6_array[_pr_recycle_INET6_tail];
_MD_UNLOCK(&_pr_recycle_lock);
return rv;
}
_MD_UNLOCK(&_pr_recycle_lock);
rv = _PR_MD_SOCKET(af, SOCK_STREAM, 0);
if (rv != INVALID_SOCKET && _md_Associate((HANDLE)rv) == 0) {
closesocket(rv);
return INVALID_SOCKET;
}
return rv;
}
/* _md_put_recycled_socket()
* Add a socket to the recycle bin.
*/
static void
_md_put_recycled_socket(SOCKET newsock, int af)
{
PR_ASSERT(_pr_recycle_INET_tail >= 0);
PR_ASSERT(_pr_recycle_INET6_tail >= 0);
_MD_LOCK(&_pr_recycle_lock);
if (af == AF_INET && _pr_recycle_INET_tail < RECYCLE_SIZE) {
_pr_recycle_INET_array[_pr_recycle_INET_tail] = newsock;
_pr_recycle_INET_tail++;
_MD_UNLOCK(&_pr_recycle_lock);
} else if (af == AF_INET6 && _pr_recycle_INET6_tail < RECYCLE_SIZE) {
_pr_recycle_INET6_array[_pr_recycle_INET6_tail] = newsock;
_pr_recycle_INET6_tail++;
_MD_UNLOCK(&_pr_recycle_lock);
} else {
_MD_UNLOCK(&_pr_recycle_lock);
closesocket(newsock);
}
return;
}
/* _md_Associate()
* Associates a file with the completion port.
* Returns 0 on failure, 1 on success.
*/
PRInt32
_md_Associate(HANDLE file)
{
HANDLE port;
if (!_native_threads_only) {
port = CreateIoCompletionPort((HANDLE)file,
_pr_completion_port,
KEY_IO,
0);
/* XXX should map error codes on failures */
return (port == _pr_completion_port);
} else {
return 1;
}
}
/*
* _md_MakeNonblock()
* Make a socket nonblocking.
* Returns 0 on failure, 1 on success.
*/
static PRInt32
_md_MakeNonblock(HANDLE file)
{
int rv;
u_long one = 1;
rv = ioctlsocket((SOCKET)file, FIONBIO, &one);
/* XXX should map error codes on failures */
return (rv == 0);
}
static int missing_completions = 0;
static int max_wait_loops = 0;
static PRInt32
_NT_IO_ABORT(PROsfd sock)
{
PRThread *me = _PR_MD_CURRENT_THREAD();
PRBool fWait;
PRInt32 rv;
int loop_count;
/* This is a clumsy way to abort the IO, but it is all we can do.
* It looks a bit racy, but we handle all the cases.
* case 1: IO completes before calling closesocket
* case 1a: fWait is set to PR_FALSE
* This should e the most likely case. We'll properly
* not wait call _NT_IO_WAIT, since the closesocket()
* won't be forcing a completion.
* case 1b: fWait is set to PR_TRUE
* This hopefully won't happen much. When it does, this
* thread will timeout in _NT_IO_WAIT for CLOSE_INTERVAL
* before cleaning up.
* case 2: IO does not complete before calling closesocket
* case 2a: IO never completes
* This is the likely case. We'll close it and wait
* for the completion forced by the close. Return should
* be immediate.
* case 2b: IO completes just after calling closesocket
* Since the closesocket is issued, we'll either get a
* completion back for the real IO or for the close. We
* don't really care. It may not even be possible to get
* a real completion here. In any event, we'll awaken
* from NT_IO_WAIT immediately.
*/
_PR_THREAD_LOCK(me);
fWait = me->io_pending;
if (fWait) {
/*
* If there's still I/O pending, it should have already timed
* out once before this function is called.
*/
PR_ASSERT(me->io_suspended == PR_TRUE);
/* Set up to wait for I/O completion again */
me->state = _PR_IO_WAIT;
me->io_suspended = PR_FALSE;
me->md.interrupt_disabled = PR_TRUE;
}
_PR_THREAD_UNLOCK(me);
/* Close the socket if there is one */
if (sock != INVALID_SOCKET) {
rv = closesocket((SOCKET)sock);
}
/* If there was I/O pending before the close, wait for it to complete */
if (fWait) {
/* Wait and wait for the I/O to complete */
for (loop_count = 0; fWait; ++loop_count) {
_NT_IO_WAIT(me, CLOSE_TIMEOUT);
_PR_THREAD_LOCK(me);
fWait = me->io_pending;
if (fWait) {
PR_ASSERT(me->io_suspended == PR_TRUE);
me->state = _PR_IO_WAIT;
me->io_suspended = PR_FALSE;
}
_PR_THREAD_UNLOCK(me);
if (loop_count > max_wait_loops) {
max_wait_loops = loop_count;
}
}
if (loop_count > 1) {
++missing_completions;
}
me->md.interrupt_disabled = PR_FALSE;
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
}
PR_ASSERT(me->io_pending == PR_FALSE);
me->md.thr_bound_cpu = NULL;
me->io_suspended = PR_FALSE;
return rv;
}
PROsfd
_PR_MD_SOCKET(int af, int type, int flags)
{
SOCKET sock;
sock = socket(af, type, flags);
if (sock == INVALID_SOCKET) {
_PR_MD_MAP_SOCKET_ERROR(WSAGetLastError());
}
return (PROsfd)sock;
}
struct connect_data_s {
PRInt32 status;
PRInt32 error;
PROsfd osfd;
struct sockaddr *addr;
PRUint32 addrlen;
PRIntervalTime timeout;
};
void
_PR_MD_connect_thread(void *cdata)
{
struct connect_data_s *cd = (struct connect_data_s *)cdata;
cd->status = connect(cd->osfd, cd->addr, cd->addrlen);
if (cd->status == SOCKET_ERROR)
cd->error = WSAGetLastError();
return;
}
PRInt32
_PR_MD_CONNECT(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen,
PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv, err;
u_long nbio;
PRInt32 rc;
if (fd->secret->nonblocking) {
if (!fd->secret->md.io_model_committed) {
rv = _md_MakeNonblock((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
if ((rv = connect(osfd, (struct sockaddr *) addr, addrlen)) == -1) {
err = WSAGetLastError();
_PR_MD_MAP_CONNECT_ERROR(err);
}
return rv;
}
/*
* Temporarily make the socket non-blocking so that we can
* initiate a non-blocking connect and wait for its completion
* (with a timeout) in select.
*/
PR_ASSERT(!fd->secret->md.io_model_committed);
nbio = 1;
rv = ioctlsocket((SOCKET)osfd, FIONBIO, &nbio);
PR_ASSERT(0 == rv);
rc = _nt_nonblock_connect(fd, (struct sockaddr *) addr, addrlen, timeout);
/* Set the socket back to blocking. */
nbio = 0;
rv = ioctlsocket((SOCKET)osfd, FIONBIO, &nbio);
PR_ASSERT(0 == rv);
return rc;
}
PRInt32
_PR_MD_BIND(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen)
{
PRInt32 rv;
#if 0
int one = 1;
#endif
rv = bind(fd->secret->md.osfd, (const struct sockaddr *)&(addr->inet), addrlen);
if (rv == SOCKET_ERROR) {
_PR_MD_MAP_BIND_ERROR(WSAGetLastError());
return -1;
}
#if 0
/* Disable nagle- so far unknown if this is good or not...
*/
rv = setsockopt(fd->secret->md.osfd,
SOL_SOCKET,
TCP_NODELAY,
(const char *)&one,
sizeof(one));
PR_ASSERT(rv == 0);
#endif
return 0;
}
void _PR_MD_UPDATE_ACCEPT_CONTEXT(PROsfd accept_sock, PROsfd listen_sock)
{
/* Sockets accept()'d with AcceptEx need to call this setsockopt before
* calling anything other than ReadFile(), WriteFile(), send(), recv(),
* Transmitfile(), and closesocket(). In order to call any other
* winsock functions, we have to make this setsockopt call.
*
* XXXMB - For the server, we *NEVER* need this in
* the "normal" code path. But now we have to call it. This is a waste
* of a system call. We'd like to only call it before calling the
* obscure socket calls, but since we don't know at that point what the
* original socket was (or even if it is still alive) we can't do it
* at that point...
*/
setsockopt((SOCKET)accept_sock,
SOL_SOCKET,
SO_UPDATE_ACCEPT_CONTEXT,
(char *)&listen_sock,
sizeof(listen_sock));
}
#define INET_ADDR_PADDED (sizeof(PRNetAddr) + 16)
PROsfd
_PR_MD_FAST_ACCEPT(PRFileDesc *fd, PRNetAddr *raddr, PRUint32 *rlen,
PRIntervalTime timeout, PRBool fast,
_PR_AcceptTimeoutCallback callback, void *callbackArg)
{
PROsfd osfd = fd->secret->md.osfd;
PRThread *me = _PR_MD_CURRENT_THREAD();
SOCKET accept_sock;
int bytes;
PRNetAddr *Laddr;
PRNetAddr *Raddr;
PRUint32 llen, err;
int rv;
if (_NT_USE_NB_IO(fd)) {
if (!fd->secret->md.io_model_committed) {
rv = _md_MakeNonblock((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
/*
* The accepted socket inherits the nonblocking and
* inheritable (HANDLE_FLAG_INHERIT) attributes of
* the listening socket.
*/
accept_sock = _nt_nonblock_accept(fd, (struct sockaddr *)raddr, rlen, timeout);
if (!fd->secret->nonblocking) {
u_long zero = 0;
rv = ioctlsocket(accept_sock, FIONBIO, &zero);
PR_ASSERT(0 == rv);
}
return accept_sock;
}
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return -1;
}
if (!fd->secret->md.io_model_committed) {
rv = _md_Associate((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
if (!me->md.acceptex_buf) {
me->md.acceptex_buf = PR_MALLOC(2*INET_ADDR_PADDED);
if (!me->md.acceptex_buf) {
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
return -1;
}
}
accept_sock = _md_get_recycled_socket(fd->secret->af);
if (accept_sock == INVALID_SOCKET)
return -1;
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
if (_native_threads_only)
me->md.overlapped.overlapped.hEvent = me->md.thr_event;
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
closesocket(accept_sock);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
me->io_fd = osfd;
rv = AcceptEx((SOCKET)osfd,
accept_sock,
me->md.acceptex_buf,
0,
INET_ADDR_PADDED,
INET_ADDR_PADDED,
&bytes,
&(me->md.overlapped.overlapped));
if ( (rv == 0) && ((err = WSAGetLastError()) != ERROR_IO_PENDING)) {
/* Argh! The IO failed */
closesocket(accept_sock);
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
_PR_THREAD_UNLOCK(me);
_PR_MD_MAP_ACCEPTEX_ERROR(err);
return -1;
}
if (_native_threads_only && rv) {
_native_thread_io_nowait(me, rv, bytes);
} else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) {
PR_ASSERT(0);
closesocket(accept_sock);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE);
if (me->io_suspended) {
closesocket(accept_sock);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
}
return -1;
}
if (me->md.blocked_io_status == 0) {
closesocket(accept_sock);
_PR_MD_MAP_ACCEPTEX_ERROR(me->md.blocked_io_error);
return -1;
}
if (!fast)
_PR_MD_UPDATE_ACCEPT_CONTEXT((SOCKET)accept_sock, (SOCKET)osfd);
/* IO is done */
GetAcceptExSockaddrs(
me->md.acceptex_buf,
0,
INET_ADDR_PADDED,
INET_ADDR_PADDED,
(LPSOCKADDR *)&(Laddr),
&llen,
(LPSOCKADDR *)&(Raddr),
(unsigned int *)rlen);
if (raddr != NULL)
memcpy((char *)raddr, (char *)&Raddr->inet, *rlen);
PR_ASSERT(me->io_pending == PR_FALSE);
return accept_sock;
}
PRInt32
_PR_MD_FAST_ACCEPT_READ(PRFileDesc *sd, PROsfd *newSock, PRNetAddr **raddr,
void *buf, PRInt32 amount, PRIntervalTime timeout,
PRBool fast, _PR_AcceptTimeoutCallback callback,
void *callbackArg)
{
PROsfd sock = sd->secret->md.osfd;
PRThread *me = _PR_MD_CURRENT_THREAD();
int bytes;
PRNetAddr *Laddr;
PRUint32 llen, rlen, err;
int rv;
PRBool isConnected;
PRBool madeCallback = PR_FALSE;
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return -1;
}
if (!sd->secret->md.io_model_committed) {
rv = _md_Associate((HANDLE)sock);
PR_ASSERT(0 != rv);
sd->secret->md.io_model_committed = PR_TRUE;
}
*newSock = _md_get_recycled_socket(sd->secret->af);
if (*newSock == INVALID_SOCKET)
return -1;
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
if (_native_threads_only)
me->md.overlapped.overlapped.hEvent = me->md.thr_event;
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
closesocket(*newSock);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
me->io_fd = sock;
rv = AcceptEx((SOCKET)sock,
*newSock,
buf,
amount,
INET_ADDR_PADDED,
INET_ADDR_PADDED,
&bytes,
&(me->md.overlapped.overlapped));
if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING)) {
closesocket(*newSock);
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
_PR_THREAD_UNLOCK(me);
_PR_MD_MAP_ACCEPTEX_ERROR(err);
return -1;
}
if (_native_threads_only && rv) {
_native_thread_io_nowait(me, rv, bytes);
} else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) {
PR_ASSERT(0);
closesocket(*newSock);
return -1;
}
retry:
if (me->io_suspended) {
PRInt32 err;
INT seconds;
INT bytes = sizeof(seconds);
PR_ASSERT(timeout != PR_INTERVAL_NO_TIMEOUT);
err = getsockopt(*newSock,
SOL_SOCKET,
SO_CONNECT_TIME,
(char *)&seconds,
(PINT)&bytes);
if ( err == NO_ERROR ) {
PRIntervalTime elapsed = PR_SecondsToInterval(seconds);
if (seconds == 0xffffffff)
isConnected = PR_FALSE;
else
isConnected = PR_TRUE;
if (!isConnected) {
if (madeCallback == PR_FALSE && callback)
callback(callbackArg);
madeCallback = PR_TRUE;
me->state = _PR_IO_WAIT;
if (_NT_ResumeIO(me, timeout) == PR_FAILURE) {
closesocket(*newSock);
return -1;
}
goto retry;
}
if (elapsed < timeout) {
/* Socket is connected but time not elapsed, RESUME IO */
timeout -= elapsed;
me->state = _PR_IO_WAIT;
if (_NT_ResumeIO(me, timeout) == PR_FAILURE) {
closesocket(*newSock);
return -1;
}
goto retry;
}
} else {
/* What to do here? Assume socket not open?*/
PR_ASSERT(0);
isConnected = PR_FALSE;
}
rv = _NT_IO_ABORT(*newSock);
PR_ASSERT(me->io_pending == PR_FALSE);
PR_ASSERT(me->io_suspended == PR_FALSE);
PR_ASSERT(me->md.thr_bound_cpu == NULL);
/* If the IO is still suspended, it means we didn't get any
* completion from NT_IO_WAIT. This is not disasterous, I hope,
* but it may mean we still have an IO outstanding... Try to
* recover by just allowing ourselves to continue.
*/
me->io_suspended = PR_FALSE;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
}
me->state = _PR_RUNNING;
closesocket(*newSock);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE);
PR_ASSERT(me->io_suspended == PR_FALSE);
PR_ASSERT(me->md.thr_bound_cpu == NULL);
if (me->md.blocked_io_status == 0) {
_PR_MD_MAP_ACCEPTEX_ERROR(me->md.blocked_io_error);
closesocket(*newSock);
return -1;
}
if (!fast)
_PR_MD_UPDATE_ACCEPT_CONTEXT((SOCKET)*newSock, (SOCKET)sock);
/* IO is done */
GetAcceptExSockaddrs(
buf,
amount,
INET_ADDR_PADDED,
INET_ADDR_PADDED,
(LPSOCKADDR *)&(Laddr),
&llen,
(LPSOCKADDR *)(raddr),
(unsigned int *)&rlen);
return me->md.blocked_io_bytes;
}
PRInt32
_PR_MD_SENDFILE(PRFileDesc *sock, PRSendFileData *sfd,
PRInt32 flags, PRIntervalTime timeout)
{
PRThread *me = _PR_MD_CURRENT_THREAD();
PRInt32 tflags;
int rv, err;
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return -1;
}
if (!sock->secret->md.io_model_committed) {
rv = _md_Associate((HANDLE)sock->secret->md.osfd);
PR_ASSERT(0 != rv);
sock->secret->md.io_model_committed = PR_TRUE;
}
if (!me->md.xmit_bufs) {
me->md.xmit_bufs = PR_NEW(TRANSMIT_FILE_BUFFERS);
if (!me->md.xmit_bufs) {
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
return -1;
}
}
me->md.xmit_bufs->Head = (void *)sfd->header;
me->md.xmit_bufs->HeadLength = sfd->hlen;
me->md.xmit_bufs->Tail = (void *)sfd->trailer;
me->md.xmit_bufs->TailLength = sfd->tlen;
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
me->md.overlapped.overlapped.Offset = sfd->file_offset;
if (_native_threads_only)
me->md.overlapped.overlapped.hEvent = me->md.thr_event;
tflags = 0;
if (flags & PR_TRANSMITFILE_CLOSE_SOCKET)
tflags = TF_DISCONNECT | TF_REUSE_SOCKET;
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
me->io_fd = sock->secret->md.osfd;
rv = TransmitFile((SOCKET)sock->secret->md.osfd,
(HANDLE)sfd->fd->secret->md.osfd,
(DWORD)sfd->file_nbytes,
(DWORD)0,
(LPOVERLAPPED)&(me->md.overlapped.overlapped),
(TRANSMIT_FILE_BUFFERS *)me->md.xmit_bufs,
(DWORD)tflags);
if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
_PR_THREAD_UNLOCK(me);
_PR_MD_MAP_TRANSMITFILE_ERROR(err);
return -1;
}
if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) {
PR_ASSERT(0);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE);
if (me->io_suspended) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
}
return -1;
}
if (me->md.blocked_io_status == 0) {
_PR_MD_MAP_TRANSMITFILE_ERROR(me->md.blocked_io_error);
return -1;
}
if (flags & PR_TRANSMITFILE_CLOSE_SOCKET) {
_md_put_recycled_socket(sock->secret->md.osfd, sock->secret->af);
}
PR_ASSERT(me->io_pending == PR_FALSE);
return me->md.blocked_io_bytes;
}
PRInt32
_PR_MD_RECV(PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags,
PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRThread *me = _PR_MD_CURRENT_THREAD();
int bytes;
int rv, err;
if (_NT_USE_NB_IO(fd)) {
if (!fd->secret->md.io_model_committed) {
rv = _md_MakeNonblock((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
return _nt_nonblock_recv(fd, buf, amount, flags, timeout);
}
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return -1;
}
if (!fd->secret->md.io_model_committed) {
rv = _md_Associate((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
if (_native_threads_only)
me->md.overlapped.overlapped.hEvent = me->md.thr_event;
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
me->io_fd = osfd;
rv = ReadFile((HANDLE)osfd,
buf,
amount,
&bytes,
&(me->md.overlapped.overlapped));
if ( (rv == 0) && (GetLastError() != ERROR_IO_PENDING) ) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
_PR_THREAD_UNLOCK(me);
if ((err = GetLastError()) == ERROR_HANDLE_EOF)
return 0;
_PR_MD_MAP_READ_ERROR(err);
return -1;
}
if (_native_threads_only && rv) {
_native_thread_io_nowait(me, rv, bytes);
} else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) {
PR_ASSERT(0);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE);
if (me->io_suspended) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
}
return -1;
}
if (me->md.blocked_io_status == 0) {
if (me->md.blocked_io_error == ERROR_HANDLE_EOF)
return 0;
_PR_MD_MAP_READ_ERROR(me->md.blocked_io_error);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE);
return me->md.blocked_io_bytes;
}
PRInt32
_PR_MD_SEND(PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRThread *me = _PR_MD_CURRENT_THREAD();
int bytes;
int rv, err;
if (_NT_USE_NB_IO(fd)) {
if (!fd->secret->md.io_model_committed) {
rv = _md_MakeNonblock((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
return _nt_nonblock_send(fd, (char *)buf, amount, timeout);
}
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return -1;
}
if (!fd->secret->md.io_model_committed) {
rv = _md_Associate((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
if (_native_threads_only)
me->md.overlapped.overlapped.hEvent = me->md.thr_event;
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
me->io_fd = osfd;
rv = WriteFile((HANDLE)osfd,
buf,
amount,
&bytes,
&(me->md.overlapped.overlapped));
if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
_PR_THREAD_UNLOCK(me);
_PR_MD_MAP_WRITE_ERROR(err);
return -1;
}
if (_native_threads_only && rv) {
_native_thread_io_nowait(me, rv, bytes);
} else if (_NT_IO_WAIT(me, timeout) == PR_FAILURE) {
PR_ASSERT(0);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE);
if (me->io_suspended) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
}
return -1;
}
if (me->md.blocked_io_status == 0) {
_PR_MD_MAP_WRITE_ERROR(me->md.blocked_io_error);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE);
return me->md.blocked_io_bytes;
}
PRInt32
_PR_MD_SENDTO(PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv;
if (!fd->secret->md.io_model_committed) {
rv = _md_MakeNonblock((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
if (_NT_USE_NB_IO(fd))
return _nt_nonblock_sendto(fd, buf, amount, (struct sockaddr *)addr, addrlen, timeout);
else
return pt_SendTo(osfd, buf, amount, flags, addr, addrlen, timeout);
}
PRInt32
_PR_MD_RECVFROM(PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags,
PRNetAddr *addr, PRUint32 *addrlen, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv;
if (!fd->secret->md.io_model_committed) {
rv = _md_MakeNonblock((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
if (_NT_USE_NB_IO(fd))
return _nt_nonblock_recvfrom(fd, buf, amount, (struct sockaddr *)addr, addrlen, timeout);
else
return pt_RecvFrom(osfd, buf, amount, flags, addr, addrlen, timeout);
}
/* XXXMB - for now this is a sockets call only */
PRInt32
_PR_MD_WRITEV(PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
int index;
int sent = 0;
int rv;
if (_NT_USE_NB_IO(fd)) {
if (!fd->secret->md.io_model_committed) {
rv = _md_MakeNonblock((HANDLE)osfd);
PR_ASSERT(0 != rv);
fd->secret->md.io_model_committed = PR_TRUE;
}
return _nt_nonblock_writev(fd, iov, iov_size, timeout);
}
for (index=0; index<iov_size; index++) {
rv = _PR_MD_SEND(fd, iov[index].iov_base, iov[index].iov_len, 0,
timeout);
if (rv > 0)
sent += rv;
if ( rv != iov[index].iov_len ) {
if (sent <= 0)
return -1;
return -1;
}
}
return sent;
}
PRInt32
_PR_MD_LISTEN(PRFileDesc *fd, PRIntn backlog)
{
PRInt32 rv;
rv = listen(fd->secret->md.osfd, backlog);
if (rv < 0)
_PR_MD_MAP_LISTEN_ERROR(WSAGetLastError());
return(rv);
}
PRInt32
_PR_MD_SHUTDOWN(PRFileDesc *fd, PRIntn how)
{
PRInt32 rv;
rv = shutdown(fd->secret->md.osfd, how);
if (rv < 0)
_PR_MD_MAP_SHUTDOWN_ERROR(WSAGetLastError());
return(rv);
}
PRStatus
_PR_MD_GETSOCKNAME(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *len)
{
PRInt32 rv;
rv = getsockname((SOCKET)fd->secret->md.osfd, (struct sockaddr *)addr, len);
if (rv==0)
return PR_SUCCESS;
else {
_PR_MD_MAP_GETSOCKNAME_ERROR(WSAGetLastError());
return PR_FAILURE;
}
}
PRStatus
_PR_MD_GETPEERNAME(PRFileDesc *fd, PRNetAddr *addr, PRUint32 *len)
{
PRInt32 rv;
/*
* NT has a bug that, when invoked on a socket accepted by
* AcceptEx(), getpeername() returns an all-zero peer address.
* To work around this bug, we store the peer's address (returned
* by AcceptEx()) with the socket fd and use the cached peer
* address if the socket is an accepted socket.
*/
if (fd->secret->md.accepted_socket) {
INT seconds;
INT bytes = sizeof(seconds);
/*
* Determine if the socket is connected.
*/
rv = getsockopt(fd->secret->md.osfd,
SOL_SOCKET,
SO_CONNECT_TIME,
(char *) &seconds,
(PINT) &bytes);
if (rv == NO_ERROR) {
if (seconds == 0xffffffff) {
PR_SetError(PR_NOT_CONNECTED_ERROR, 0);
return PR_FAILURE;
}
*len = PR_NETADDR_SIZE(&fd->secret->md.peer_addr);
memcpy(addr, &fd->secret->md.peer_addr, *len);
return PR_SUCCESS;
} else {
_PR_MD_MAP_GETSOCKOPT_ERROR(WSAGetLastError());
return PR_FAILURE;
}
} else {
rv = getpeername((SOCKET)fd->secret->md.osfd,
(struct sockaddr *) addr, len);
if (rv == 0) {
return PR_SUCCESS;
} else {
_PR_MD_MAP_GETPEERNAME_ERROR(WSAGetLastError());
return PR_FAILURE;
}
}
}
PRStatus
_PR_MD_GETSOCKOPT(PRFileDesc *fd, PRInt32 level, PRInt32 optname, char* optval, PRInt32* optlen)
{
PRInt32 rv;
rv = getsockopt((SOCKET)fd->secret->md.osfd, level, optname, optval, optlen);
if (rv==0)
return PR_SUCCESS;
else {
_PR_MD_MAP_GETSOCKOPT_ERROR(WSAGetLastError());
return PR_FAILURE;
}
}
PRStatus
_PR_MD_SETSOCKOPT(PRFileDesc *fd, PRInt32 level, PRInt32 optname, const char* optval, PRInt32 optlen)
{
PRInt32 rv;
rv = setsockopt((SOCKET)fd->secret->md.osfd, level, optname, optval, optlen);
if (rv==0)
return PR_SUCCESS;
else {
_PR_MD_MAP_SETSOCKOPT_ERROR(WSAGetLastError());
return PR_FAILURE;
}
}
/* --- FILE IO ----------------------------------------------------------- */
PROsfd
_PR_MD_OPEN(const char *name, PRIntn osflags, PRIntn mode)
{
HANDLE file;
PRInt32 access = 0;
PRInt32 flags = 0;
PRInt32 flag6 = 0;
if (osflags & PR_SYNC) flag6 = FILE_FLAG_WRITE_THROUGH;
if (osflags & PR_RDONLY || osflags & PR_RDWR) access |= GENERIC_READ;
if (osflags & PR_WRONLY || osflags & PR_RDWR) access |= GENERIC_WRITE;
if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL )
flags = CREATE_NEW;
else if (osflags & PR_CREATE_FILE)
flags = (0 != (osflags & PR_TRUNCATE)) ? CREATE_ALWAYS : OPEN_ALWAYS;
else if (osflags & PR_TRUNCATE) flags = TRUNCATE_EXISTING;
else flags = OPEN_EXISTING;
flag6 |= FILE_FLAG_OVERLAPPED;
file = CreateFile(name,
access,
FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL,
flags,
flag6,
NULL);
if (file == INVALID_HANDLE_VALUE) {
_PR_MD_MAP_OPEN_ERROR(GetLastError());
return -1;
}
if (osflags & PR_APPEND) {
if ( SetFilePointer(file, 0, 0, FILE_END) == 0xFFFFFFFF ) {
_PR_MD_MAP_LSEEK_ERROR(GetLastError());
CloseHandle(file);
return -1;
}
}
return (PROsfd)file;
}
PROsfd
_PR_MD_OPEN_FILE(const char *name, PRIntn osflags, PRIntn mode)
{
HANDLE file;
PRInt32 access = 0;
PRInt32 flags = 0;
PRInt32 flag6 = 0;
SECURITY_ATTRIBUTES sa;
LPSECURITY_ATTRIBUTES lpSA = NULL;
PSECURITY_DESCRIPTOR pSD = NULL;
PACL pACL = NULL;
if (osflags & PR_SYNC) flag6 = FILE_FLAG_WRITE_THROUGH;
if (osflags & PR_RDONLY || osflags & PR_RDWR) access |= GENERIC_READ;
if (osflags & PR_WRONLY || osflags & PR_RDWR) access |= GENERIC_WRITE;
if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL )
flags = CREATE_NEW;
else if (osflags & PR_CREATE_FILE)
flags = (0 != (osflags & PR_TRUNCATE)) ? CREATE_ALWAYS : OPEN_ALWAYS;
else if (osflags & PR_TRUNCATE) flags = TRUNCATE_EXISTING;
else flags = OPEN_EXISTING;
flag6 |= FILE_FLAG_OVERLAPPED;
if (osflags & PR_CREATE_FILE) {
if (_PR_NT_MakeSecurityDescriptorACL(mode, fileAccessTable,
&pSD, &pACL) == PR_SUCCESS) {
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = pSD;
sa.bInheritHandle = FALSE;
lpSA = &sa;
}
}
file = CreateFile(name,
access,
FILE_SHARE_READ|FILE_SHARE_WRITE,
lpSA,
flags,
flag6,
NULL);
if (lpSA != NULL) {
_PR_NT_FreeSecurityDescriptorACL(pSD, pACL);
}
if (file == INVALID_HANDLE_VALUE) {
_PR_MD_MAP_OPEN_ERROR(GetLastError());
return -1;
}
if (osflags & PR_APPEND) {
if ( SetFilePointer(file, 0, 0, FILE_END) == 0xFFFFFFFF ) {
_PR_MD_MAP_LSEEK_ERROR(GetLastError());
CloseHandle(file);
return -1;
}
}
return (PROsfd)file;
}
PRInt32
_PR_MD_READ(PRFileDesc *fd, void *buf, PRInt32 len)
{
PROsfd f = fd->secret->md.osfd;
PRUint32 bytes;
int rv, err;
LONG hiOffset = 0;
LONG loOffset;
if (!fd->secret->md.sync_file_io) {
PRThread *me = _PR_MD_CURRENT_THREAD();
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return -1;
}
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
me->md.overlapped.overlapped.Offset = SetFilePointer((HANDLE)f, 0, &me->md.overlapped.overlapped.OffsetHigh, FILE_CURRENT);
PR_ASSERT((me->md.overlapped.overlapped.Offset != 0xffffffff) || (GetLastError() == NO_ERROR));
if (fd->secret->inheritable == _PR_TRI_TRUE) {
rv = ReadFile((HANDLE)f,
(LPVOID)buf,
len,
&bytes,
&me->md.overlapped.overlapped);
if (rv != 0) {
loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT);
PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR));
return bytes;
}
err = GetLastError();
if (err == ERROR_IO_PENDING) {
rv = GetOverlappedResult((HANDLE)f,
&me->md.overlapped.overlapped, &bytes, TRUE);
if (rv != 0) {
loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT);
PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR));
return bytes;
}
err = GetLastError();
}
if (err == ERROR_HANDLE_EOF) {
return 0;
} else {
_PR_MD_MAP_READ_ERROR(err);
return -1;
}
} else {
if (!fd->secret->md.io_model_committed) {
rv = _md_Associate((HANDLE)f);
PR_ASSERT(rv != 0);
fd->secret->md.io_model_committed = PR_TRUE;
}
if (_native_threads_only)
me->md.overlapped.overlapped.hEvent = me->md.thr_event;
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
me->io_fd = f;
rv = ReadFile((HANDLE)f,
(LPVOID)buf,
len,
&bytes,
&me->md.overlapped.overlapped);
if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
_PR_THREAD_UNLOCK(me);
if (err == ERROR_HANDLE_EOF) {
return 0;
}
_PR_MD_MAP_READ_ERROR(err);
return -1;
}
if (_native_threads_only && rv) {
_native_thread_io_nowait(me, rv, bytes);
} else if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) {
PR_ASSERT(0);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE);
if (me->io_suspended) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
}
return -1;
}
if (me->md.blocked_io_status == 0) {
if (me->md.blocked_io_error == ERROR_HANDLE_EOF) {
return 0;
}
_PR_MD_MAP_READ_ERROR(me->md.blocked_io_error);
return -1;
}
SetFilePointer((HANDLE)f, me->md.blocked_io_bytes, 0, FILE_CURRENT);
PR_ASSERT(me->io_pending == PR_FALSE);
return me->md.blocked_io_bytes;
}
} else {
rv = ReadFile((HANDLE)f,
(LPVOID)buf,
len,
&bytes,
NULL);
if (rv == 0) {
err = GetLastError();
/* ERROR_HANDLE_EOF can only be returned by async io */
PR_ASSERT(err != ERROR_HANDLE_EOF);
if (err == ERROR_BROKEN_PIPE) {
/* The write end of the pipe has been closed. */
return 0;
}
_PR_MD_MAP_READ_ERROR(err);
return -1;
}
return bytes;
}
}
PRInt32
_PR_MD_WRITE(PRFileDesc *fd, const void *buf, PRInt32 len)
{
PROsfd f = fd->secret->md.osfd;
PRInt32 bytes;
int rv, err;
LONG hiOffset = 0;
LONG loOffset;
LARGE_INTEGER offset; /* use for the calculation of the new offset */
if (!fd->secret->md.sync_file_io) {
PRThread *me = _PR_MD_CURRENT_THREAD();
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return -1;
}
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
me->md.overlapped.overlapped.Offset = SetFilePointer((HANDLE)f, 0, &me->md.overlapped.overlapped.OffsetHigh, FILE_CURRENT);
PR_ASSERT((me->md.overlapped.overlapped.Offset != 0xffffffff) || (GetLastError() == NO_ERROR));
if (fd->secret->inheritable == _PR_TRI_TRUE) {
rv = WriteFile((HANDLE)f,
(LPVOID)buf,
len,
&bytes,
&me->md.overlapped.overlapped);
if (rv != 0) {
loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT);
PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR));
return bytes;
}
err = GetLastError();
if (err == ERROR_IO_PENDING) {
rv = GetOverlappedResult((HANDLE)f,
&me->md.overlapped.overlapped, &bytes, TRUE);
if (rv != 0) {
loOffset = SetFilePointer((HANDLE)f, bytes, &hiOffset, FILE_CURRENT);
PR_ASSERT((loOffset != 0xffffffff) || (GetLastError() == NO_ERROR));
return bytes;
}
err = GetLastError();
}
_PR_MD_MAP_READ_ERROR(err);
return -1;
} else {
if (!fd->secret->md.io_model_committed) {
rv = _md_Associate((HANDLE)f);
PR_ASSERT(rv != 0);
fd->secret->md.io_model_committed = PR_TRUE;
}
if (_native_threads_only)
me->md.overlapped.overlapped.hEvent = me->md.thr_event;
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
me->io_fd = f;
rv = WriteFile((HANDLE)f,
buf,
len,
&bytes,
&(me->md.overlapped.overlapped));
if ( (rv == 0) && ((err = GetLastError()) != ERROR_IO_PENDING) ) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
_PR_THREAD_UNLOCK(me);
_PR_MD_MAP_WRITE_ERROR(err);
return -1;
}
if (_native_threads_only && rv) {
_native_thread_io_nowait(me, rv, bytes);
} else if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) {
PR_ASSERT(0);
return -1;
}
PR_ASSERT(me->io_pending == PR_FALSE || me->io_suspended == PR_TRUE);
if (me->io_suspended) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
}
return -1;
}
if (me->md.blocked_io_status == 0) {
_PR_MD_MAP_WRITE_ERROR(me->md.blocked_io_error);
return -1;
}
/*
* Moving the file pointer by a relative offset (FILE_CURRENT)
* does not work with a file on a network drive exported by a
* Win2K system. We still don't know why. A workaround is to
* move the file pointer by an absolute offset (FILE_BEGIN).
* (Bugzilla bug 70765)
*/
offset.LowPart = me->md.overlapped.overlapped.Offset;
offset.HighPart = me->md.overlapped.overlapped.OffsetHigh;
offset.QuadPart += me->md.blocked_io_bytes;
SetFilePointer((HANDLE)f, offset.LowPart, &offset.HighPart, FILE_BEGIN);
PR_ASSERT(me->io_pending == PR_FALSE);
return me->md.blocked_io_bytes;
}
} else {
rv = WriteFile((HANDLE)f,
buf,
len,
&bytes,
NULL);
if (rv == 0) {
_PR_MD_MAP_WRITE_ERROR(GetLastError());
return -1;
}
return bytes;
}
}
PRInt32
_PR_MD_SOCKETAVAILABLE(PRFileDesc *fd)
{
PRInt32 result;
if (ioctlsocket(fd->secret->md.osfd, FIONREAD, &result) < 0) {
PR_SetError(PR_BAD_DESCRIPTOR_ERROR, WSAGetLastError());
return -1;
}
return result;
}
PRInt32
_PR_MD_PIPEAVAILABLE(PRFileDesc *fd)
{
if (NULL == fd)
PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0);
else
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return -1;
}
PROffset32
_PR_MD_LSEEK(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence)
{
DWORD moveMethod;
PROffset32 rv;
switch (whence) {
case PR_SEEK_SET:
moveMethod = FILE_BEGIN;
break;
case PR_SEEK_CUR:
moveMethod = FILE_CURRENT;
break;
case PR_SEEK_END:
moveMethod = FILE_END;
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return -1;
}
rv = SetFilePointer((HANDLE)fd->secret->md.osfd, offset, NULL, moveMethod);
/*
* If the lpDistanceToMoveHigh argument (third argument) is
* NULL, SetFilePointer returns 0xffffffff on failure.
*/
if (-1 == rv) {
_PR_MD_MAP_LSEEK_ERROR(GetLastError());
}
return rv;
}
PROffset64
_PR_MD_LSEEK64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence)
{
DWORD moveMethod;
LARGE_INTEGER li;
DWORD err;
switch (whence) {
case PR_SEEK_SET:
moveMethod = FILE_BEGIN;
break;
case PR_SEEK_CUR:
moveMethod = FILE_CURRENT;
break;
case PR_SEEK_END:
moveMethod = FILE_END;
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return -1;
}
li.QuadPart = offset;
li.LowPart = SetFilePointer((HANDLE)fd->secret->md.osfd,
li.LowPart, &li.HighPart, moveMethod);
if (0xffffffff == li.LowPart && (err = GetLastError()) != NO_ERROR) {
_PR_MD_MAP_LSEEK_ERROR(err);
li.QuadPart = -1;
}
return li.QuadPart;
}
/*
* This is documented to succeed on read-only files, but Win32's
* FlushFileBuffers functions fails with "access denied" in such a
* case. So we only signal an error if the error is *not* "access
* denied".
*/
PRInt32
_PR_MD_FSYNC(PRFileDesc *fd)
{
/*
* From the documentation:
*
* On Windows NT, the function FlushFileBuffers fails if hFile
* is a handle to console output. That is because console
* output is not buffered. The function returns FALSE, and
* GetLastError returns ERROR_INVALID_HANDLE.
*
* On the other hand, on Win95, it returns without error. I cannot
* assume that 0, 1, and 2 are console, because if someone closes
* System.out and then opens a file, they might get file descriptor
* 1. An error on *that* version of 1 should be reported, whereas
* an error on System.out (which was the original 1) should be
* ignored. So I use isatty() to ensure that such an error was
* because of this, and if it was, I ignore the error.
*/
BOOL ok = FlushFileBuffers((HANDLE)fd->secret->md.osfd);
if (!ok) {
DWORD err = GetLastError();
if (err != ERROR_ACCESS_DENIED) { /* from winerror.h */
_PR_MD_MAP_FSYNC_ERROR(err);
return -1;
}
}
return 0;
}
PRInt32
_PR_MD_CLOSE(PROsfd osfd, PRBool socket)
{
PRInt32 rv;
PRThread *me = _PR_MD_CURRENT_THREAD();
if (socket) {
rv = closesocket((SOCKET)osfd);
if (rv < 0)
_PR_MD_MAP_CLOSE_ERROR(WSAGetLastError());
} else {
rv = CloseHandle((HANDLE)osfd)?0:-1;
if (rv < 0)
_PR_MD_MAP_CLOSE_ERROR(GetLastError());
}
if (rv == 0 && me->io_suspended) {
if (me->io_fd == osfd) {
PRBool fWait;
_PR_THREAD_LOCK(me);
me->state = _PR_IO_WAIT;
/* The IO could have completed on another thread just after
* calling closesocket while the io_suspended flag was true.
* So we now grab the lock to do a safe check on io_pending to
* see if we need to wait or not.
*/
fWait = me->io_pending;
me->io_suspended = PR_FALSE;
me->md.interrupt_disabled = PR_TRUE;
_PR_THREAD_UNLOCK(me);
if (fWait)
_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT);
PR_ASSERT(me->io_suspended == PR_FALSE);
PR_ASSERT(me->io_pending == PR_FALSE);
/*
* I/O operation is no longer pending; the thread can now
* run on any cpu
*/
_PR_THREAD_LOCK(me);
me->md.interrupt_disabled = PR_FALSE;
me->md.thr_bound_cpu = NULL;
me->io_suspended = PR_FALSE;
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
_PR_THREAD_UNLOCK(me);
}
}
return rv;
}
PRStatus
_PR_MD_SET_FD_INHERITABLE(PRFileDesc *fd, PRBool inheritable)
{
BOOL rv;
if (fd->secret->md.io_model_committed) {
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
}
rv = SetHandleInformation(
(HANDLE)fd->secret->md.osfd,
HANDLE_FLAG_INHERIT,
inheritable ? HANDLE_FLAG_INHERIT : 0);
if (0 == rv) {
_PR_MD_MAP_DEFAULT_ERROR(GetLastError());
return PR_FAILURE;
}
return PR_SUCCESS;
}
void
_PR_MD_INIT_FD_INHERITABLE(PRFileDesc *fd, PRBool imported)
{
if (imported) {
fd->secret->inheritable = _PR_TRI_UNKNOWN;
} else {
fd->secret->inheritable = _PR_TRI_FALSE;
}
}
void
_PR_MD_QUERY_FD_INHERITABLE(PRFileDesc *fd)
{
DWORD flags;
PR_ASSERT(_PR_TRI_UNKNOWN == fd->secret->inheritable);
if (fd->secret->md.io_model_committed) {
return;
}
if (GetHandleInformation((HANDLE)fd->secret->md.osfd, &flags)) {
if (flags & HANDLE_FLAG_INHERIT) {
fd->secret->inheritable = _PR_TRI_TRUE;
} else {
fd->secret->inheritable = _PR_TRI_FALSE;
}
}
}
/* --- DIR IO ------------------------------------------------------------ */
#define GetFileFromDIR(d) (d)->d_entry.cFileName
#define FileIsHidden(d) ((d)->d_entry.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
void FlipSlashes(char *cp, int len)
{
while (--len >= 0) {
if (cp[0] == '/') {
cp[0] = PR_DIRECTORY_SEPARATOR;
}
cp = _mbsinc(cp);
}
} /* end FlipSlashes() */
/*
**
** Local implementations of standard Unix RTL functions which are not provided
** by the VC RTL.
**
*/
PRInt32
_PR_MD_CLOSE_DIR(_MDDir *d)
{
if ( d ) {
if (FindClose( d->d_hdl )) {
d->magic = (PRUint32)-1;
return 0;
} else {
_PR_MD_MAP_CLOSEDIR_ERROR(GetLastError());
return -1;
}
}
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return -1;
}
PRStatus
_PR_MD_OPEN_DIR(_MDDir *d, const char *name)
{
char filename[ MAX_PATH ];
int len;
len = strlen(name);
/* Need 5 bytes for \*.* and the trailing null byte. */
if (len + 5 > MAX_PATH) {
PR_SetError(PR_NAME_TOO_LONG_ERROR, 0);
return PR_FAILURE;
}
strcpy(filename, name);
/*
* If 'name' ends in a slash or backslash, do not append
* another backslash.
*/
if (IsPrevCharSlash(filename, filename + len)) {
len--;
}
strcpy(&filename[len], "\\*.*");
FlipSlashes( filename, strlen(filename) );
d->d_hdl = FindFirstFile( filename, &(d->d_entry) );
if ( d->d_hdl == INVALID_HANDLE_VALUE ) {
_PR_MD_MAP_OPENDIR_ERROR(GetLastError());
return PR_FAILURE;
}
d->firstEntry = PR_TRUE;
d->magic = _MD_MAGIC_DIR;
return PR_SUCCESS;
}
char *
_PR_MD_READ_DIR(_MDDir *d, PRIntn flags)
{
PRInt32 err;
BOOL rv;
char *fileName;
if ( d ) {
while (1) {
if (d->firstEntry) {
d->firstEntry = PR_FALSE;
rv = 1;
} else {
rv = FindNextFile(d->d_hdl, &(d->d_entry));
}
if (rv == 0) {
break;
}
fileName = GetFileFromDIR(d);
if ( (flags & PR_SKIP_DOT) &&
(fileName[0] == '.') && (fileName[1] == '\0'))
continue;
if ( (flags & PR_SKIP_DOT_DOT) &&
(fileName[0] == '.') && (fileName[1] == '.') &&
(fileName[2] == '\0'))
continue;
if ( (flags & PR_SKIP_HIDDEN) && FileIsHidden(d))
continue;
return fileName;
}
err = GetLastError();
PR_ASSERT(NO_ERROR != err);
_PR_MD_MAP_READDIR_ERROR(err);
return NULL;
}
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return NULL;
}
PRInt32
_PR_MD_DELETE(const char *name)
{
if (DeleteFile(name)) {
return 0;
} else {
_PR_MD_MAP_DELETE_ERROR(GetLastError());
return -1;
}
}
void
_PR_FileTimeToPRTime(const FILETIME *filetime, PRTime *prtm)
{
PR_ASSERT(sizeof(FILETIME) == sizeof(PRTime));
CopyMemory(prtm, filetime, sizeof(PRTime));
#ifdef __GNUC__
*prtm = (*prtm - _pr_filetime_offset) / 10LL;
#else
*prtm = (*prtm - _pr_filetime_offset) / 10i64;
#endif
#ifdef DEBUG
/* Doublecheck our calculation. */
{
SYSTEMTIME systime;
PRExplodedTime etm;
PRTime cmp; /* for comparison */
BOOL rv;
rv = FileTimeToSystemTime(filetime, &systime);
PR_ASSERT(0 != rv);
/*
* PR_ImplodeTime ignores wday and yday.
*/
etm.tm_usec = systime.wMilliseconds * PR_USEC_PER_MSEC;
etm.tm_sec = systime.wSecond;
etm.tm_min = systime.wMinute;
etm.tm_hour = systime.wHour;
etm.tm_mday = systime.wDay;
etm.tm_month = systime.wMonth - 1;
etm.tm_year = systime.wYear;
/*
* It is not well-documented what time zone the FILETIME's
* are in. WIN32_FIND_DATA is documented to be in UTC (GMT).
* But BY_HANDLE_FILE_INFORMATION is unclear about this.
* By our best judgement, we assume that FILETIME is in UTC.
*/
etm.tm_params.tp_gmt_offset = 0;
etm.tm_params.tp_dst_offset = 0;
cmp = PR_ImplodeTime(&etm);
/*
* SYSTEMTIME is in milliseconds precision, so we convert PRTime's
* microseconds to milliseconds before doing the comparison.
*/
PR_ASSERT((cmp / PR_USEC_PER_MSEC) == (*prtm / PR_USEC_PER_MSEC));
}
#endif /* DEBUG */
}
PRInt32
_PR_MD_STAT(const char *fn, struct stat *info)
{
PRInt32 rv;
rv = _stat(fn, (struct _stat *)info);
if (-1 == rv) {
/*
* Check for MSVC runtime library _stat() bug.
* (It's really a bug in FindFirstFile().)
* If a pathname ends in a backslash or slash,
* e.g., c:\temp\ or c:/temp/, _stat() will fail.
* Note: a pathname ending in a slash (e.g., c:/temp/)
* can be handled by _stat() on NT but not on Win95.
*
* We remove the backslash or slash at the end and
* try again.
*/
int len = strlen(fn);
if (len > 0 && len <= _MAX_PATH
&& IsPrevCharSlash(fn, fn + len)) {
char newfn[_MAX_PATH + 1];
strcpy(newfn, fn);
newfn[len - 1] = '\0';
rv = _stat(newfn, (struct _stat *)info);
}
}
if (-1 == rv) {
_PR_MD_MAP_STAT_ERROR(errno);
}
return rv;
}
#define _PR_IS_SLASH(ch) ((ch) == '/' || (ch) == '\\')
static PRBool
IsPrevCharSlash(const char *str, const char *current)
{
const char *prev;
if (str >= current)
return PR_FALSE;
prev = _mbsdec(str, current);
return (prev == current - 1) && _PR_IS_SLASH(*prev);
}
/*
* IsRootDirectory --
*
* Return PR_TRUE if the pathname 'fn' is a valid root directory,
* else return PR_FALSE. The char buffer pointed to by 'fn' must
* be writable. During the execution of this function, the contents
* of the buffer pointed to by 'fn' may be modified, but on return
* the original contents will be restored. 'buflen' is the size of
* the buffer pointed to by 'fn'.
*
* Root directories come in three formats:
* 1. / or \, meaning the root directory of the current drive.
* 2. C:/ or C:\, where C is a drive letter.
* 3. \\<server name>\<share point name>\ or
* \\<server name>\<share point name>, meaning the root directory
* of a UNC (Universal Naming Convention) name.
*/
static PRBool
IsRootDirectory(char *fn, size_t buflen)
{
char *p;
PRBool slashAdded = PR_FALSE;
PRBool rv = PR_FALSE;
if (_PR_IS_SLASH(fn[0]) && fn[1] == '\0') {
return PR_TRUE;
}
if (isalpha(fn[0]) && fn[1] == ':' && _PR_IS_SLASH(fn[2])
&& fn[3] == '\0') {
rv = GetDriveType(fn) > 1 ? PR_TRUE : PR_FALSE;
return rv;
}
/* The UNC root directory */
if (_PR_IS_SLASH(fn[0]) && _PR_IS_SLASH(fn[1])) {
/* The 'server' part should have at least one character. */
p = &fn[2];
if (*p == '\0' || _PR_IS_SLASH(*p)) {
return PR_FALSE;
}
/* look for the next slash */
do {
p = _mbsinc(p);
} while (*p != '\0' && !_PR_IS_SLASH(*p));
if (*p == '\0') {
return PR_FALSE;
}
/* The 'share' part should have at least one character. */
p++;
if (*p == '\0' || _PR_IS_SLASH(*p)) {
return PR_FALSE;
}
/* look for the final slash */
do {
p = _mbsinc(p);
} while (*p != '\0' && !_PR_IS_SLASH(*p));
if (_PR_IS_SLASH(*p) && p[1] != '\0') {
return PR_FALSE;
}
if (*p == '\0') {
/*
* GetDriveType() doesn't work correctly if the
* path is of the form \\server\share, so we add
* a final slash temporarily.
*/
if ((p + 1) < (fn + buflen)) {
*p++ = '\\';
*p = '\0';
slashAdded = PR_TRUE;
} else {
return PR_FALSE; /* name too long */
}
}
rv = GetDriveType(fn) > 1 ? PR_TRUE : PR_FALSE;
/* restore the 'fn' buffer */
if (slashAdded) {
*--p = '\0';
}
}
return rv;
}
PRInt32
_PR_MD_GETFILEINFO64(const char *fn, PRFileInfo64 *info)
{
WIN32_FILE_ATTRIBUTE_DATA findFileData;
if (NULL == fn || '\0' == *fn) {
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return -1;
}
if (!GetFileAttributesEx(fn, GetFileExInfoStandard, &findFileData)) {
_PR_MD_MAP_OPENDIR_ERROR(GetLastError());
return -1;
}
if (findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
info->type = PR_FILE_DIRECTORY;
} else {
info->type = PR_FILE_FILE;
}
info->size = findFileData.nFileSizeHigh;
info->size = (info->size << 32) + findFileData.nFileSizeLow;
_PR_FileTimeToPRTime(&findFileData.ftLastWriteTime, &info->modifyTime);
if (0 == findFileData.ftCreationTime.dwLowDateTime &&
0 == findFileData.ftCreationTime.dwHighDateTime) {
info->creationTime = info->modifyTime;
} else {
_PR_FileTimeToPRTime(&findFileData.ftCreationTime,
&info->creationTime);
}
return 0;
}
PRInt32
_PR_MD_GETFILEINFO(const char *fn, PRFileInfo *info)
{
PRFileInfo64 info64;
PRInt32 rv = _PR_MD_GETFILEINFO64(fn, &info64);
if (0 == rv)
{
info->type = info64.type;
info->size = (PRUint32) info64.size;
info->modifyTime = info64.modifyTime;
info->creationTime = info64.creationTime;
}
return rv;
}
PRInt32
_PR_MD_GETOPENFILEINFO64(const PRFileDesc *fd, PRFileInfo64 *info)
{
int rv;
BY_HANDLE_FILE_INFORMATION hinfo;
rv = GetFileInformationByHandle((HANDLE)fd->secret->md.osfd, &hinfo);
if (rv == FALSE) {
_PR_MD_MAP_FSTAT_ERROR(GetLastError());
return -1;
}
if (hinfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
info->type = PR_FILE_DIRECTORY;
else
info->type = PR_FILE_FILE;
info->size = hinfo.nFileSizeHigh;
info->size = (info->size << 32) + hinfo.nFileSizeLow;
_PR_FileTimeToPRTime(&hinfo.ftLastWriteTime, &(info->modifyTime) );
_PR_FileTimeToPRTime(&hinfo.ftCreationTime, &(info->creationTime) );
return 0;
}
PRInt32
_PR_MD_GETOPENFILEINFO(const PRFileDesc *fd, PRFileInfo *info)
{
int rv;
BY_HANDLE_FILE_INFORMATION hinfo;
rv = GetFileInformationByHandle((HANDLE)fd->secret->md.osfd, &hinfo);
if (rv == FALSE) {
_PR_MD_MAP_FSTAT_ERROR(GetLastError());
return -1;
}
if (hinfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
info->type = PR_FILE_DIRECTORY;
else
info->type = PR_FILE_FILE;
info->size = hinfo.nFileSizeLow;
_PR_FileTimeToPRTime(&hinfo.ftLastWriteTime, &(info->modifyTime) );
_PR_FileTimeToPRTime(&hinfo.ftCreationTime, &(info->creationTime) );
return 0;
}
PRInt32
_PR_MD_RENAME(const char *from, const char *to)
{
/* Does this work with dot-relative pathnames? */
if (MoveFile(from, to)) {
return 0;
} else {
_PR_MD_MAP_RENAME_ERROR(GetLastError());
return -1;
}
}
PRInt32
_PR_MD_ACCESS(const char *name, PRAccessHow how)
{
PRInt32 rv;
switch (how) {
case PR_ACCESS_WRITE_OK:
rv = _access(name, 02);
break;
case PR_ACCESS_READ_OK:
rv = _access(name, 04);
break;
case PR_ACCESS_EXISTS:
rv = _access(name, 00);
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return -1;
}
if (rv < 0) {
_PR_MD_MAP_ACCESS_ERROR(errno);
}
return rv;
}
PRInt32
_PR_MD_MKDIR(const char *name, PRIntn mode)
{
/* XXXMB - how to translate the "mode"??? */
if (CreateDirectory(name, NULL)) {
return 0;
} else {
_PR_MD_MAP_MKDIR_ERROR(GetLastError());
return -1;
}
}
PRInt32
_PR_MD_MAKE_DIR(const char *name, PRIntn mode)
{
BOOL rv;
SECURITY_ATTRIBUTES sa;
LPSECURITY_ATTRIBUTES lpSA = NULL;
PSECURITY_DESCRIPTOR pSD = NULL;
PACL pACL = NULL;
if (_PR_NT_MakeSecurityDescriptorACL(mode, dirAccessTable,
&pSD, &pACL) == PR_SUCCESS) {
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = pSD;
sa.bInheritHandle = FALSE;
lpSA = &sa;
}
rv = CreateDirectory(name, lpSA);
if (lpSA != NULL) {
_PR_NT_FreeSecurityDescriptorACL(pSD, pACL);
}
if (rv) {
return 0;
} else {
_PR_MD_MAP_MKDIR_ERROR(GetLastError());
return -1;
}
}
PRInt32
_PR_MD_RMDIR(const char *name)
{
if (RemoveDirectory(name)) {
return 0;
} else {
_PR_MD_MAP_RMDIR_ERROR(GetLastError());
return -1;
}
}
PRStatus
_PR_MD_LOCKFILE(PROsfd f)
{
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return PR_FAILURE;
}
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
rv = LockFileEx((HANDLE)f,
LOCKFILE_EXCLUSIVE_LOCK,
0,
0x7fffffff,
0,
&me->md.overlapped.overlapped);
if (_native_threads_only) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
_PR_THREAD_UNLOCK(me);
if (rv == FALSE) {
err = GetLastError();
PR_ASSERT(err != ERROR_IO_PENDING);
_PR_MD_MAP_LOCKF_ERROR(err);
return PR_FAILURE;
}
return PR_SUCCESS;
}
/* HACK AROUND NT BUG
* NT 3.51 has a bug. In NT 3.51, if LockFileEx returns true, you
* don't get any completion on the completion port. This is a bug.
*
* They fixed it on NT4.0 so that you do get a completion.
*
* If we pretend we won't get a completion, NSPR gets confused later
* when the unexpected completion arrives. If we assume we do get
* a completion, we hang on 3.51. Worse, Microsoft informs me that the
* behavior varies on 3.51 depending on if you are using a network
* file system or a local disk!
*
* Solution: For now, _nt_version_gets_lockfile_completion is set
* depending on whether or not this system is EITHER
* - running NT 4.0
* - running NT 3.51 with a service pack greater than 5.
*
* In the meantime, this code may not work on network file systems.
*
*/
if ( rv == FALSE && ((err = GetLastError()) != ERROR_IO_PENDING)) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
_PR_THREAD_UNLOCK(me);
_PR_MD_MAP_LOCKF_ERROR(err);
return PR_FAILURE;
}
#ifdef _NEED_351_FILE_LOCKING_HACK
else if (rv) {
/* If this is NT 3.51 and the file is local, then we won't get a
* completion back from LockFile when it succeeded.
*/
if (_nt_version_gets_lockfile_completion == PR_FALSE) {
if ( IsFileLocal((HANDLE)f) == _PR_LOCAL_FILE) {
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
return PR_SUCCESS;
}
}
}
#endif /* _NEED_351_FILE_LOCKING_HACK */
if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
if (me->md.blocked_io_status == 0) {
_PR_MD_MAP_LOCKF_ERROR(me->md.blocked_io_error);
return PR_FAILURE;
}
return PR_SUCCESS;
}
PRStatus
_PR_MD_TLOCKFILE(PROsfd f)
{
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return PR_FAILURE;
}
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
_PR_THREAD_LOCK(me);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return -1;
}
me->io_pending = PR_TRUE;
me->state = _PR_IO_WAIT;
_PR_THREAD_UNLOCK(me);
rv = LockFileEx((HANDLE)f,
LOCKFILE_FAIL_IMMEDIATELY|LOCKFILE_EXCLUSIVE_LOCK,
0,
0x7fffffff,
0,
&me->md.overlapped.overlapped);
if (_native_threads_only) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
_PR_THREAD_UNLOCK(me);
if (rv == FALSE) {
err = GetLastError();
PR_ASSERT(err != ERROR_IO_PENDING);
_PR_MD_MAP_LOCKF_ERROR(err);
return PR_FAILURE;
}
return PR_SUCCESS;
}
if ( rv == FALSE && ((err = GetLastError()) != ERROR_IO_PENDING)) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
_PR_THREAD_UNLOCK(me);
_PR_MD_MAP_LOCKF_ERROR(err);
return PR_FAILURE;
}
#ifdef _NEED_351_FILE_LOCKING_HACK
else if (rv) {
/* If this is NT 3.51 and the file is local, then we won't get a
* completion back from LockFile when it succeeded.
*/
if (_nt_version_gets_lockfile_completion == PR_FALSE) {
if ( IsFileLocal((HANDLE)f) == _PR_LOCAL_FILE) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
_PR_THREAD_UNLOCK(me);
return PR_SUCCESS;
}
}
}
#endif /* _NEED_351_FILE_LOCKING_HACK */
if (_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE) {
_PR_THREAD_LOCK(me);
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
_PR_THREAD_UNLOCK(me);
return PR_FAILURE;
}
if (me->md.blocked_io_status == 0) {
_PR_MD_MAP_LOCKF_ERROR(me->md.blocked_io_error);
return PR_FAILURE;
}
return PR_SUCCESS;
}
PRStatus
_PR_MD_UNLOCKFILE(PROsfd f)
{
PRInt32 rv;
PRThread *me = _PR_MD_CURRENT_THREAD();
if (me->io_suspended) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return PR_FAILURE;
}
memset(&(me->md.overlapped.overlapped), 0, sizeof(OVERLAPPED));
rv = UnlockFileEx((HANDLE)f,
0,
0x7fffffff,
0,
&me->md.overlapped.overlapped);
if (rv)
return PR_SUCCESS;
else {
int err = GetLastError();
_PR_MD_MAP_LOCKF_ERROR(err);
return PR_FAILURE;
}
}
void
_PR_MD_MAKE_NONBLOCK(PRFileDesc *f)
{
/*
* On NT, we either call _md_Associate() or _md_MakeNonblock(),
* depending on whether the socket is blocking or not.
*
* Once we associate a socket with the io completion port,
* there is no way to disassociate it from the io completion
* port. So we have to call _md_Associate/_md_MakeNonblock
* lazily.
*/
}
#ifdef _NEED_351_FILE_LOCKING_HACK
/***************
**
** Lockfile hacks
**
** The following code is a hack to work around a microsoft bug with lockfile.
** The problem is that on NT 3.51, if LockFileEx() succeeds, you never
** get a completion back for files that are on local disks. So, we need to
** know if a file is local or remote so we can tell if we should expect
** a completion.
**
** The only way to check if a file is local or remote based on the handle is
** to get the serial number for the volume it is mounted on and then to
** compare that with mounted drives. This code caches the volume numbers of
** fixed disks and does a relatively quick check.
**
** Locking: Since the only thing we ever do when multithreaded is a 32bit
** assignment, we probably don't need locking. It is included just
** case anyway.
**
** Limitations: Does not work on floppies because they are too slow
** Unknown if it will work on wierdo 3rd party file systems
**
****************
*/
/* There can only be 26 drive letters on NT */
#define _PR_MAX_DRIVES 26
_MDLock cachedVolumeLock;
DWORD dwCachedVolumeSerialNumbers[_PR_MAX_DRIVES] = {0};
DWORD dwLastCachedDrive = 0;
DWORD dwRemoveableDrivesToCheck = 0; /* bitmask for removeable drives */
PRBool IsFileLocalInit()
{
TCHAR lpBuffer[_PR_MAX_DRIVES*5];
DWORD nBufferLength = _PR_MAX_DRIVES*5;
DWORD nBufferNeeded = GetLogicalDriveStrings(0, NULL);
DWORD dwIndex = 0;
DWORD dwDriveType;
DWORD dwVolumeSerialNumber;
DWORD dwDriveIndex = 0;
DWORD oldmode = (DWORD) -1;
_MD_NEW_LOCK(&cachedVolumeLock);
nBufferNeeded = GetLogicalDriveStrings(nBufferLength, lpBuffer);
if (nBufferNeeded == 0 || nBufferNeeded > nBufferLength)
return PR_FALSE;
// Calling GetVolumeInformation on a removeable drive where the
// disk is currently removed will cause a dialog box to the
// console. This is not good.
// Temporarily disable the SEM_FAILCRITICALERRORS to avoid the
// damn dialog.
dwCachedVolumeSerialNumbers[dwDriveIndex] = 0;
oldmode = SetErrorMode(SEM_FAILCRITICALERRORS);
// now loop through the logical drives
while(lpBuffer[dwIndex] != TEXT('\0'))
{
// skip the floppy drives. This is *SLOW*
if ((lpBuffer[dwIndex] == TEXT('A')) || (lpBuffer[dwIndex] == TEXT('B')))
/* Skip over floppies */;
else
{
dwDriveIndex = (lpBuffer[dwIndex] - TEXT('A'));
dwDriveType = GetDriveType(&lpBuffer[dwIndex]);
switch(dwDriveType)
{
// Ignore these drive types
case 0:
case 1:
case DRIVE_REMOTE:
default: // If the drive type is unknown, ignore it.
break;
// Removable media drives can have different serial numbers
// at different times, so cache the current serial number
// but keep track of them so they can be rechecked if necessary.
case DRIVE_REMOVABLE:
// CDROM is a removable media
case DRIVE_CDROM:
// no idea if ramdisks can change serial numbers or not
// but it doesn't hurt to treat them as removable.
case DRIVE_RAMDISK:
// Here is where we keep track of removable drives.
dwRemoveableDrivesToCheck |= 1 << dwDriveIndex;
// removable drives fall through to fixed drives and get cached.
case DRIVE_FIXED:
// cache volume serial numbers.
if (GetVolumeInformation(
&lpBuffer[dwIndex],
NULL, 0,
&dwVolumeSerialNumber,
NULL, NULL, NULL, 0)
)
{
if (dwLastCachedDrive < dwDriveIndex)
dwLastCachedDrive = dwDriveIndex;
dwCachedVolumeSerialNumbers[dwDriveIndex] = dwVolumeSerialNumber;
}
break;
}
}
dwIndex += lstrlen(&lpBuffer[dwIndex]) +1;
}
if (oldmode != (DWORD) -1) {
SetErrorMode(oldmode);
oldmode = (DWORD) -1;
}
return PR_TRUE;
}
PRInt32 IsFileLocal(HANDLE hFile)
{
DWORD dwIndex = 0, dwMask;
BY_HANDLE_FILE_INFORMATION Info;
TCHAR szDrive[4] = TEXT("C:\\");
DWORD dwVolumeSerialNumber;
DWORD oldmode = (DWORD) -1;
int rv = _PR_REMOTE_FILE;
if (!GetFileInformationByHandle(hFile, &Info))
return -1;
// look to see if the volume serial number has been cached.
_MD_LOCK(&cachedVolumeLock);
while(dwIndex <= dwLastCachedDrive)
if (dwCachedVolumeSerialNumbers[dwIndex++] == Info.dwVolumeSerialNumber)
{
_MD_UNLOCK(&cachedVolumeLock);
return _PR_LOCAL_FILE;
}
_MD_UNLOCK(&cachedVolumeLock);
// volume serial number not found in the cache. Check removable files.
// removable drives are noted as a bitmask. If the bit associated with
// a specific drive is set, then we should query its volume serial number
// as its possible it has changed.
dwMask = dwRemoveableDrivesToCheck;
dwIndex = 0;
while(dwMask)
{
while(!(dwMask & 1))
{
dwIndex++;
dwMask = dwMask >> 1;
}
szDrive[0] = TEXT('A')+ (TCHAR) dwIndex;
// Calling GetVolumeInformation on a removeable drive where the
// disk is currently removed will cause a dialog box to the
// console. This is not good.
// Temporarily disable the SEM_FAILCRITICALERRORS to avoid the
// dialog.
oldmode = SetErrorMode(SEM_FAILCRITICALERRORS);
if (GetVolumeInformation(
szDrive,
NULL, 0,
&dwVolumeSerialNumber,
NULL, NULL, NULL, 0)
)
{
if (dwVolumeSerialNumber == Info.dwVolumeSerialNumber)
{
_MD_LOCK(&cachedVolumeLock);
if (dwLastCachedDrive < dwIndex)
dwLastCachedDrive = dwIndex;
dwCachedVolumeSerialNumbers[dwIndex] = dwVolumeSerialNumber;
_MD_UNLOCK(&cachedVolumeLock);
rv = _PR_LOCAL_FILE;
}
}
if (oldmode != (DWORD) -1) {
SetErrorMode(oldmode);
oldmode = (DWORD) -1;
}
if (rv == _PR_LOCAL_FILE)
return _PR_LOCAL_FILE;
dwIndex++;
dwMask = dwMask >> 1;
}
return _PR_REMOTE_FILE;
}
#endif /* _NEED_351_FILE_LOCKING_HACK */
PR_IMPLEMENT(PRStatus) PR_NT_CancelIo(PRFileDesc *fd)
{
PRThread *me = _PR_MD_CURRENT_THREAD();
PRBool fWait;
PRFileDesc *bottom;
bottom = PR_GetIdentitiesLayer(fd, PR_NSPR_IO_LAYER);
if (!me->io_suspended || (NULL == bottom) ||
(me->io_fd != bottom->secret->md.osfd)) {
PR_SetError(PR_INVALID_STATE_ERROR, 0);
return PR_FAILURE;
}
/*
* The CancelIO operation has to be issued by the same NT thread that
* issued the I/O operation
*/
PR_ASSERT(_PR_IS_NATIVE_THREAD(me) || (me->cpu == me->md.thr_bound_cpu));
if (me->io_pending) {
if (!CancelIo((HANDLE)bottom->secret->md.osfd)) {
PR_SetError(PR_INVALID_STATE_ERROR, GetLastError());
return PR_FAILURE;
}
}
_PR_THREAD_LOCK(me);
fWait = me->io_pending;
me->io_suspended = PR_FALSE;
me->state = _PR_IO_WAIT;
me->md.interrupt_disabled = PR_TRUE;
_PR_THREAD_UNLOCK(me);
if (fWait)
_NT_IO_WAIT(me, PR_INTERVAL_NO_TIMEOUT);
PR_ASSERT(me->io_suspended == PR_FALSE);
PR_ASSERT(me->io_pending == PR_FALSE);
_PR_THREAD_LOCK(me);
me->md.interrupt_disabled = PR_FALSE;
me->md.thr_bound_cpu = NULL;
me->io_suspended = PR_FALSE;
me->io_pending = PR_FALSE;
me->state = _PR_RUNNING;
_PR_THREAD_UNLOCK(me);
return PR_SUCCESS;
}
static PROsfd _nt_nonblock_accept(PRFileDesc *fd, struct sockaddr *addr, int *addrlen, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
SOCKET sock;
PRInt32 rv, err;
fd_set rd;
struct timeval tv, *tvp;
FD_ZERO(&rd);
FD_SET((SOCKET)osfd, &rd);
if (timeout == PR_INTERVAL_NO_TIMEOUT) {
while ((sock = accept(osfd, addr, addrlen)) == -1) {
if (((err = WSAGetLastError()) == WSAEWOULDBLOCK)
&& (!fd->secret->nonblocking)) {
if ((rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL,
NULL)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
break;
}
} else {
_PR_MD_MAP_ACCEPT_ERROR(err);
break;
}
}
} else if (timeout == PR_INTERVAL_NO_WAIT) {
if ((sock = accept(osfd, addr, addrlen)) == -1) {
if (((err = WSAGetLastError()) == WSAEWOULDBLOCK)
&& (!fd->secret->nonblocking)) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
} else {
_PR_MD_MAP_ACCEPT_ERROR(err);
}
}
} else {
retry:
if ((sock = accept(osfd, addr, addrlen)) == -1) {
if (((err = WSAGetLastError()) == WSAEWOULDBLOCK)
&& (!fd->secret->nonblocking)) {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL, tvp);
if (rv > 0) {
goto retry;
} else if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
} else {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
}
} else {
_PR_MD_MAP_ACCEPT_ERROR(err);
}
}
}
return (PROsfd)sock;
}
static PRInt32 _nt_nonblock_connect(PRFileDesc *fd, struct sockaddr *addr, int addrlen, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv;
int err;
fd_set wr, ex;
struct timeval tv, *tvp;
int len;
if ((rv = connect(osfd, addr, addrlen)) == -1) {
if ((err = WSAGetLastError()) == WSAEWOULDBLOCK) {
if ( timeout == PR_INTERVAL_NO_TIMEOUT ) {
tvp = NULL;
} else {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
}
FD_ZERO(&wr);
FD_ZERO(&ex);
FD_SET((SOCKET)osfd, &wr);
FD_SET((SOCKET)osfd, &ex);
if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wr, &ex,
tvp)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
return rv;
}
if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
return -1;
}
/* Call Sleep(0) to work around a Winsock timeing bug. */
Sleep(0);
if (FD_ISSET((SOCKET)osfd, &ex)) {
len = sizeof(err);
if (getsockopt(osfd, SOL_SOCKET, SO_ERROR,
(char *) &err, &len) == SOCKET_ERROR) {
_PR_MD_MAP_GETSOCKOPT_ERROR(WSAGetLastError());
return -1;
}
_PR_MD_MAP_CONNECT_ERROR(err);
return -1;
}
PR_ASSERT(FD_ISSET((SOCKET)osfd, &wr));
rv = 0;
} else {
_PR_MD_MAP_CONNECT_ERROR(err);
}
}
return rv;
}
static PRInt32 _nt_nonblock_recv(PRFileDesc *fd, char *buf, int len, int flags, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv, err;
struct timeval tv, *tvp;
fd_set rd;
int osflags;
if (0 == flags) {
osflags = 0;
} else {
PR_ASSERT(PR_MSG_PEEK == flags);
osflags = MSG_PEEK;
}
while ((rv = recv(osfd,buf,len,osflags)) == -1) {
if (((err = WSAGetLastError()) == WSAEWOULDBLOCK)
&& (!fd->secret->nonblocking)) {
FD_ZERO(&rd);
FD_SET((SOCKET)osfd, &rd);
if (timeout == PR_INTERVAL_NO_TIMEOUT) {
tvp = NULL;
} else {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
}
if ((rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL,
tvp)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
break;
} else if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
rv = -1;
break;
}
} else {
_PR_MD_MAP_RECV_ERROR(err);
break;
}
}
return(rv);
}
static PRInt32 _nt_nonblock_send(PRFileDesc *fd, char *buf, int len, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv, err;
struct timeval tv, *tvp;
fd_set wd;
PRInt32 bytesSent = 0;
while(bytesSent < len) {
while ((rv = send(osfd,buf,len,0)) == -1) {
if (((err = WSAGetLastError()) == WSAEWOULDBLOCK)
&& (!fd->secret->nonblocking)) {
if ( timeout == PR_INTERVAL_NO_TIMEOUT ) {
tvp = NULL;
} else {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
}
FD_ZERO(&wd);
FD_SET((SOCKET)osfd, &wd);
if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL,
tvp)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
return -1;
}
if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
return -1;
}
} else {
_PR_MD_MAP_SEND_ERROR(err);
return -1;
}
}
bytesSent += rv;
if (fd->secret->nonblocking) {
break;
}
if (bytesSent < len) {
if ( timeout == PR_INTERVAL_NO_TIMEOUT ) {
tvp = NULL;
} else {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
}
FD_ZERO(&wd);
FD_SET((SOCKET)osfd, &wd);
if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL,
tvp)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
return -1;
}
if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
return -1;
}
}
}
return bytesSent;
}
static PRInt32 _nt_nonblock_writev(PRFileDesc *fd, const PRIOVec *iov, int size, PRIntervalTime timeout)
{
int index;
int sent = 0;
int rv;
for (index=0; index<size; index++) {
rv = _nt_nonblock_send(fd, iov[index].iov_base, iov[index].iov_len, timeout);
if (rv > 0)
sent += rv;
if ( rv != iov[index].iov_len ) {
if (rv < 0) {
if (fd->secret->nonblocking
&& (PR_GetError() == PR_WOULD_BLOCK_ERROR)
&& (sent > 0)) {
return sent;
} else {
return -1;
}
}
/* Only a nonblocking socket can have partial sends */
PR_ASSERT(fd->secret->nonblocking);
return sent;
}
}
return sent;
}
static PRInt32 _nt_nonblock_sendto(
PRFileDesc *fd, const char *buf, int len,
const struct sockaddr *addr, int addrlen, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv, err;
struct timeval tv, *tvp;
fd_set wd;
PRInt32 bytesSent = 0;
while(bytesSent < len) {
while ((rv = sendto(osfd,buf,len,0, addr, addrlen)) == -1) {
if (((err = WSAGetLastError()) == WSAEWOULDBLOCK)
&& (!fd->secret->nonblocking)) {
if ( timeout == PR_INTERVAL_NO_TIMEOUT ) {
tvp = NULL;
} else {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
}
FD_ZERO(&wd);
FD_SET((SOCKET)osfd, &wd);
if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL,
tvp)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
return -1;
}
if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
return -1;
}
} else {
_PR_MD_MAP_SENDTO_ERROR(err);
return -1;
}
}
bytesSent += rv;
if (fd->secret->nonblocking) {
break;
}
if (bytesSent < len) {
if ( timeout == PR_INTERVAL_NO_TIMEOUT ) {
tvp = NULL;
} else {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
}
FD_ZERO(&wd);
FD_SET((SOCKET)osfd, &wd);
if ((rv = _PR_NTFiberSafeSelect(0, NULL, &wd, NULL,
tvp)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
return -1;
}
if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
return -1;
}
}
}
return bytesSent;
}
static PRInt32 _nt_nonblock_recvfrom(PRFileDesc *fd, char *buf, int len, struct sockaddr *addr, int *addrlen, PRIntervalTime timeout)
{
PROsfd osfd = fd->secret->md.osfd;
PRInt32 rv, err;
struct timeval tv, *tvp;
fd_set rd;
while ((rv = recvfrom(osfd,buf,len,0,addr, addrlen)) == -1) {
if (((err = WSAGetLastError()) == WSAEWOULDBLOCK)
&& (!fd->secret->nonblocking)) {
if (timeout == PR_INTERVAL_NO_TIMEOUT) {
tvp = NULL;
} else {
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(
timeout - PR_SecondsToInterval(tv.tv_sec));
tvp = &tv;
}
FD_ZERO(&rd);
FD_SET((SOCKET)osfd, &rd);
if ((rv = _PR_NTFiberSafeSelect(0, &rd, NULL, NULL,
tvp)) == -1) {
_PR_MD_MAP_SELECT_ERROR(WSAGetLastError());
break;
} else if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
rv = -1;
break;
}
} else {
_PR_MD_MAP_RECVFROM_ERROR(err);
break;
}
}
return(rv);
}
/*
* UDP support: the continuation thread functions and recvfrom and sendto.
*/
static void pt_InsertTimedInternal(pt_Continuation *op)
{
PRInt32 delta = 0;
pt_Continuation *t_op = NULL;
PRIntervalTime now = PR_IntervalNow(), op_tmo, qd_tmo;
/*
* If this element operation isn't timed, it gets queued at the
* end of the list (just after pt_tq.tail) and we're
* finishd early.
*/
if (PR_INTERVAL_NO_TIMEOUT == op->timeout)
{
t_op = pt_tq.tail; /* put it at the end */
goto done;
}
/*
* The rest of this routine actaully deals with timed ops.
*/
if (NULL != pt_tq.op)
{
/*
* To find where in the list to put the new operation, form
* the absolute time the operations in question will expire.
*
* The new operation ('op') will expire at now() + op->timeout.
*
* The operation that will time out furthest in the future will
* do so at pt_tq.epoch + pt_tq.op->timeout.
*
* Subsequently earlier timeouts are computed based on the latter
* knowledge by subracting the timeout deltas that are stored in
* the operation list. There are operation[n]->timeout ticks
* between the expiration of operation[n-1] and operation[n].e e
*
* Therefore, the operation[n-1] will expire operation[n]->timeout
* ticks prior to operation[n].
*
* This should be easy!
*/
t_op = pt_tq.op; /* running pointer to queued op */
op_tmo = now + op->timeout; /* that's in absolute ticks */
qd_tmo = pt_tq.epoch + t_op->timeout; /* likewise */
do
{
/*
* If 'op' expires later than t_op, then insert 'op' just
* ahead of t_op. Otherwise, compute when operation[n-1]
* expires and try again.
*
* The actual different between the expiriation of 'op'
* and the current operation what becomes the new operaton's
* timeout interval. That interval is also subtracted from
* the interval of the operation immediately following where
* we stick 'op' (unless the next one isn't timed). The new
* timeout assigned to 'op' takes into account the values of
* now() and when the previous intervals were compured.
*/
delta = op_tmo - qd_tmo;
if (delta >= 0)
{
op->timeout += (now - pt_tq.epoch);
goto done;
}
qd_tmo -= t_op->timeout; /* previous operaton expiration */
t_op = t_op->prev; /* point to previous operation */
if (NULL != t_op) qd_tmo += t_op->timeout;
} while (NULL != t_op);
/*
* If we got here we backed off the head of the list. That means that
* this timed entry has to go at the head of the list. This is just
* about like having an empty timer list.
*/
delta = op->timeout; /* $$$ is this right? */
}
done:
/*
* Insert 'op' into the queue just after t_op or if t_op is null,
* at the head of the list.
*
* If t_op is NULL, the list is currently empty and this is pretty
* easy.
*/
if (NULL == t_op)
{
op->prev = NULL;
op->next = pt_tq.head;
pt_tq.head = op;
if (NULL == pt_tq.tail) pt_tq.tail = op;
else op->next->prev = op;
}
else
{
op->prev = t_op;
op->next = t_op->next;
if (NULL != op->prev)
op->prev->next = op;
if (NULL != op->next)
op->next->prev = op;
if (t_op == pt_tq.tail)
pt_tq.tail = op;
}
/*
* Are we adjusting our epoch, etc? Are we replacing
* what was previously the element due to expire furthest
* out in the future? Is this even a timed operation?
*/
if (PR_INTERVAL_NO_TIMEOUT != op->timeout)
{
if ((NULL == pt_tq.op) /* we're the one and only */
|| (t_op == pt_tq.op)) /* we're replacing */
{
pt_tq.op = op;
pt_tq.epoch = now;
}
}
pt_tq.op_count += 1;
} /* pt_InsertTimedInternal */
/*
* function: pt_FinishTimed
*
* Takes the finished operation out of the timed queue. It
* notifies the initiating thread that the opertions is
* complete and returns to the caller the value of the next
* operation in the list (or NULL).
*/
static pt_Continuation *pt_FinishTimedInternal(pt_Continuation *op)
{
pt_Continuation *next;
/* remove this one from the list */
if (NULL == op->prev) pt_tq.head = op->next;
else op->prev->next = op->next;
if (NULL == op->next) pt_tq.tail = op->prev;
else op->next->prev = op->prev;
/* did we happen to hit the timed op? */
if (op == pt_tq.op) pt_tq.op = op->prev;
next = op->next;
op->next = op->prev = NULL;
op->status = pt_continuation_done;
pt_tq.op_count -= 1;
#if defined(DEBUG)
pt_debug.continuationsServed += 1;
#endif
PR_NotifyCondVar(op->complete);
return next;
} /* pt_FinishTimedInternal */
static void ContinuationThread(void *arg)
{
/* initialization */
fd_set readSet, writeSet, exceptSet;
struct timeval tv;
SOCKET *pollingList = 0; /* list built for polling */
PRIntn pollingListUsed; /* # entries used in the list */
PRIntn pollingListNeeded; /* # entries needed this time */
PRIntn pollingSlotsAllocated = 0; /* # entries available in list */
PRIntervalTime mx_select_ticks = PR_MillisecondsToInterval(PT_DEFAULT_SELECT_MSEC);
/* do some real work */
while (1)
{
PRIntn rv;
PRStatus status;
PRIntn pollIndex;
pt_Continuation *op;
PRIntervalTime now = PR_IntervalNow();
PRIntervalTime timeout = PR_INTERVAL_NO_TIMEOUT;
PR_Lock(pt_tq.ml);
while (NULL == pt_tq.head)
{
status = PR_WaitCondVar(pt_tq.new_op, PR_INTERVAL_NO_TIMEOUT);
if ((PR_FAILURE == status)
&& (PR_PENDING_INTERRUPT_ERROR == PR_GetError())) break;
}
pollingListNeeded = pt_tq.op_count;
PR_Unlock(pt_tq.ml);
/* Okay. We're history */
if ((PR_FAILURE == status)
&& (PR_PENDING_INTERRUPT_ERROR == PR_GetError())) break;
/*
* We are not holding the pt_tq.ml lock now, so more items may
* get added to pt_tq during this window of time. We hope
* that 10 more spaces in the polling list should be enough.
*/
FD_ZERO(&readSet);
FD_ZERO(&writeSet);
FD_ZERO(&exceptSet);
pollingListNeeded += 10;
if (pollingListNeeded > pollingSlotsAllocated)
{
if (NULL != pollingList) PR_DELETE(pollingList);
pollingList = PR_MALLOC(pollingListNeeded * sizeof(PRPollDesc));
PR_ASSERT(NULL != pollingList);
pollingSlotsAllocated = pollingListNeeded;
}
#if defined(DEBUG)
if (pollingListNeeded > pt_debug.pollingListMax)
pt_debug.pollingListMax = pollingListUsed;
#endif
/*
* Build up a polling list.
* This list is sorted on time. Operations that have been
* interrupted are completed and not included in the list.
* There is an assertion that the operation is in progress.
*/
pollingListUsed = 0;
PR_Lock(pt_tq.ml);
for (op = pt_tq.head; NULL != op;)
{
if (pt_continuation_abort == op->status)
{
op->result.code = -1;
op->syserrno = WSAEINTR;
op = pt_FinishTimedInternal(op);
}
else
{
PR_ASSERT(pt_continuation_done != op->status);
op->status = pt_continuation_inprogress;
if (op->event & PR_POLL_READ) {
FD_SET(op->arg1.osfd, &readSet);
}
if (op->event & PR_POLL_WRITE) {
FD_SET(op->arg1.osfd, &writeSet);
}
if (op->event & PR_POLL_EXCEPT) {
FD_SET(op->arg1.osfd, &exceptSet);
}
pollingList[pollingListUsed] = op->arg1.osfd;
pollingListUsed += 1;
if (pollingListUsed == pollingSlotsAllocated) break;
op = op->next;
}
}
PR_Unlock(pt_tq.ml);
/*
* If 'op' isn't NULL at this point, then we didn't get to
* the end of the list. That means that more items got added
* to the list than we anticipated. So, forget this iteration,
* go around the horn again.
* One would hope this doesn't happen all that often.
*/
if (NULL != op)
{
#if defined(DEBUG)
pt_debug.predictionsFoiled += 1; /* keep track */
#endif
continue; /* make it rethink things */
}
/* there's a chance that all ops got blown away */
if (NULL == pt_tq.head) continue;
/* if not, we know this is the shortest timeout */
timeout = pt_tq.head->timeout;
/*
* We don't want to wait forever on this poll. So keep
* the interval down. The operations, if they are timed,
* still have to timeout, while those that are not timed
* should persist forever. But they may be aborted. That's
* what this anxiety is all about.
*/
if (timeout > mx_select_ticks) timeout = mx_select_ticks;
if (PR_INTERVAL_NO_TIMEOUT != pt_tq.head->timeout)
pt_tq.head->timeout -= timeout;
tv.tv_sec = PR_IntervalToSeconds(timeout);
tv.tv_usec = PR_IntervalToMicroseconds(timeout) % PR_USEC_PER_SEC;
rv = select(0, &readSet, &writeSet, &exceptSet, &tv);
if (0 == rv) /* poll timed out - what about leading op? */
{
if (0 == pt_tq.head->timeout)
{
/*
* The leading element of the timed queue has timed
* out. Get rid of it. In any case go around the
* loop again, computing the polling list, checking
* for interrupted operations.
*/
PR_Lock(pt_tq.ml);
do
{
pt_tq.head->result.code = -1;
pt_tq.head->syserrno = WSAETIMEDOUT;
op = pt_FinishTimedInternal(pt_tq.head);
} while ((NULL != op) && (0 == op->timeout));
PR_Unlock(pt_tq.ml);
}
continue;
}
if (-1 == rv && (WSAGetLastError() == WSAEINTR
|| WSAGetLastError() == WSAEINPROGRESS))
{
continue; /* go around the loop again */
}
/*
* select() says that something in our list is ready for some more
* action or is an invalid fd. Find it, load up the operation and
* see what happens.
*/
PR_ASSERT(rv > 0 || WSAGetLastError() == WSAENOTSOCK);
/*
* $$$ There's a problem here. I'm running the operations list
* and I'm not holding any locks. I don't want to hold the lock
* and do the operation, so this is really messed up..
*
* This may work out okay. The rule is that only this thread,
* the continuation thread, can remove elements from the list.
* Therefore, the list is at worst, longer than when we built
* the polling list.
*/
op = pt_tq.head;
for (pollIndex = 0; pollIndex < pollingListUsed; ++pollIndex)
{
PRInt16 revents = 0;
PR_ASSERT(NULL != op);
/*
* This one wants attention. Redo the operation.
* We know that there can only be more elements
* in the op list than we knew about when we created
* the poll list. Therefore, we might have to skip
* a few ops to find the right one to operation on.
*/
while (pollingList[pollIndex] != op->arg1.osfd )
{
op = op->next;
PR_ASSERT(NULL != op);
}
if (FD_ISSET(op->arg1.osfd, &readSet)) {
revents |= PR_POLL_READ;
}
if (FD_ISSET(op->arg1.osfd, &writeSet)) {
revents |= PR_POLL_WRITE;
}
if (FD_ISSET(op->arg1.osfd, &exceptSet)) {
revents |= PR_POLL_EXCEPT;
}
/*
* Sip over all those not in progress. They'll be
* pruned next time we build a polling list. Call
* the continuation function. If it reports completion,
* finish off the operation.
*/
if (revents && (pt_continuation_inprogress == op->status)
&& (op->function(op, revents)))
{
PR_Lock(pt_tq.ml);
op = pt_FinishTimedInternal(op);
PR_Unlock(pt_tq.ml);
}
}
}
if (NULL != pollingList) PR_DELETE(pollingList);
} /* ContinuationThread */
static int pt_Continue(pt_Continuation *op)
{
PRStatus rv;
/* Finish filling in the blank slots */
op->status = pt_continuation_sumbitted;
op->complete = PR_NewCondVar(pt_tq.ml);
PR_Lock(pt_tq.ml); /* we provide the locking */
pt_InsertTimedInternal(op); /* insert in the structure */
PR_NotifyCondVar(pt_tq.new_op); /* notify the continuation thread */
while (pt_continuation_done != op->status) /* wait for completion */
{
rv = PR_WaitCondVar(op->complete, PR_INTERVAL_NO_TIMEOUT);
/*
* If we get interrupted, we set state the continuation thread will
* see and allow it to finish the I/O operation w/ error. That way
* the rule that only the continuation thread is removing elements
* from the list is still valid.
*
* Don't call interrupt on the continuation thread. That'll just
* piss him off. He's cycling around at least every mx_select_ticks
* anyhow and should notice the request in there.
*/
if ((PR_FAILURE == rv)
&& (PR_PENDING_INTERRUPT_ERROR == PR_GetError()))
op->status = pt_continuation_abort; /* our status */
}
PR_Unlock(pt_tq.ml); /* we provide the locking */
PR_DestroyCondVar(op->complete);
return op->result.code; /* and the primary answer */
} /* pt_Continue */
static PRBool pt_sendto_cont(pt_Continuation *op, PRInt16 revents)
{
PRIntn bytes = sendto(
op->arg1.osfd, op->arg2.buffer, op->arg3.amount, op->arg4.flags,
(struct sockaddr*)op->arg5.addr, sizeof(*(op->arg5.addr)));
op->syserrno = WSAGetLastError();
if (bytes > 0) /* this is progress */
{
char *bp = op->arg2.buffer;
bp += bytes; /* adjust the buffer pointer */
op->arg2.buffer = bp;
op->result.code += bytes; /* accumulate the number sent */
op->arg3.amount -= bytes; /* and reduce the required count */
return (0 == op->arg3.amount) ? PR_TRUE : PR_FALSE;
}
else return ((-1 == bytes) && (WSAEWOULDBLOCK == op->syserrno)) ?
PR_FALSE : PR_TRUE;
} /* pt_sendto_cont */
static PRBool pt_recvfrom_cont(pt_Continuation *op, PRInt16 revents)
{
PRIntn addr_len = sizeof(*(op->arg5.addr));
op->result.code = recvfrom(
op->arg1.osfd, op->arg2.buffer, op->arg3.amount,
op->arg4.flags, (struct sockaddr*)op->arg5.addr, &addr_len);
op->syserrno = WSAGetLastError();
return ((-1 == op->result.code) && (WSAEWOULDBLOCK == op->syserrno)) ?
PR_FALSE : PR_TRUE;
} /* pt_recvfrom_cont */
static PRInt32 pt_SendTo(
SOCKET osfd, const void *buf,
PRInt32 amount, PRInt32 flags, const PRNetAddr *addr,
PRIntn addrlen, PRIntervalTime timeout)
{
PRInt32 bytes = -1, err;
PRBool fNeedContinue = PR_FALSE;
bytes = sendto(
osfd, buf, amount, flags,
(struct sockaddr*)addr, PR_NETADDR_SIZE(addr));
if (bytes == -1) {
if ((err = WSAGetLastError()) == WSAEWOULDBLOCK)
fNeedContinue = PR_TRUE;
else
_PR_MD_MAP_SENDTO_ERROR(err);
}
if (fNeedContinue == PR_TRUE)
{
pt_Continuation op;
op.arg1.osfd = osfd;
op.arg2.buffer = (void*)buf;
op.arg3.amount = amount;
op.arg4.flags = flags;
op.arg5.addr = (PRNetAddr*)addr;
op.timeout = timeout;
op.result.code = 0; /* initialize the number sent */
op.function = pt_sendto_cont;
op.event = PR_POLL_WRITE | PR_POLL_EXCEPT;
bytes = pt_Continue(&op);
if (bytes < 0) {
WSASetLastError(op.syserrno);
_PR_MD_MAP_SENDTO_ERROR(op.syserrno);
}
}
return bytes;
} /* pt_SendTo */
static PRInt32 pt_RecvFrom(SOCKET osfd, void *buf, PRInt32 amount,
PRInt32 flags, PRNetAddr *addr, PRIntn *addr_len, PRIntervalTime timeout)
{
PRInt32 bytes = -1, err;
PRBool fNeedContinue = PR_FALSE;
bytes = recvfrom(
osfd, buf, amount, flags,
(struct sockaddr*)addr, addr_len);
if (bytes == -1) {
if ((err = WSAGetLastError()) == WSAEWOULDBLOCK)
fNeedContinue = PR_TRUE;
else
_PR_MD_MAP_RECVFROM_ERROR(err);
}
if (fNeedContinue == PR_TRUE)
{
pt_Continuation op;
op.arg1.osfd = osfd;
op.arg2.buffer = buf;
op.arg3.amount = amount;
op.arg4.flags = flags;
op.arg5.addr = addr;
op.timeout = timeout;
op.function = pt_recvfrom_cont;
op.event = PR_POLL_READ | PR_POLL_EXCEPT;
bytes = pt_Continue(&op);
if (bytes < 0) {
WSASetLastError(op.syserrno);
_PR_MD_MAP_RECVFROM_ERROR(op.syserrno);
}
}
return bytes;
} /* pt_RecvFrom */