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nest-open-source / nest-learning-thermostat / 5.1.5 / nspr / refs/heads/master / . / nspr-4.8.6 / mozilla / nsprpub / pr / src / md / unix / unix.c
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/* -*- 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):
*
* 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 ***** */
#include "primpl.h"
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <sys/utsname.h>
#ifdef _PR_POLL_AVAILABLE
#include <poll.h>
#endif
/* To get FIONREAD */
#if defined(NCR) || defined(UNIXWARE) || defined(NEC) || defined(SNI) \
|| defined(SONY)
#include <sys/filio.h>
#endif
#if defined(NTO)
#include <sys/statvfs.h>
#endif
/*
* Make sure _PRSockLen_t is 32-bit, because we will cast a PRUint32* or
* PRInt32* pointer to a _PRSockLen_t* pointer.
*/
#if defined(HAVE_SOCKLEN_T) \
|| (defined(__GLIBC__) && __GLIBC__ >= 2)
#define _PRSockLen_t socklen_t
#elif defined(IRIX) || defined(HPUX) || defined(OSF1) || defined(SOLARIS) \
|| defined(AIX4_1) || defined(LINUX) || defined(SONY) \
|| defined(BSDI) || defined(SCO) || defined(NEC) || defined(SNI) \
|| defined(SUNOS4) || defined(NCR) || defined(DARWIN) \
|| defined(NEXTSTEP) || defined(QNX)
#define _PRSockLen_t int
#elif (defined(AIX) && !defined(AIX4_1)) || defined(FREEBSD) \
|| defined(NETBSD) || defined(OPENBSD) || defined(UNIXWARE) \
|| defined(DGUX) || defined(NTO) || defined(RISCOS)
#define _PRSockLen_t size_t
#else
#error "Cannot determine architecture"
#endif
/*
** Global lock variable used to bracket calls into rusty libraries that
** aren't thread safe (like libc, libX, etc).
*/
static PRLock *_pr_rename_lock = NULL;
static PRMonitor *_pr_Xfe_mon = NULL;
static PRInt64 minus_one;
sigset_t timer_set;
#if !defined(_PR_PTHREADS)
static sigset_t empty_set;
#ifdef SOLARIS
#include <sys/file.h>
#include <sys/filio.h>
#endif
#ifndef PIPE_BUF
#define PIPE_BUF 512
#endif
/*
* _nspr_noclock - if set clock interrupts are disabled
*/
int _nspr_noclock = 1;
#ifdef IRIX
extern PRInt32 _nspr_terminate_on_error;
#endif
/*
* There is an assertion in this code that NSPR's definition of PRIOVec
* is bit compatible with UNIX' definition of a struct iovec. This is
* applicable to the 'writev()' operations where the types are casually
* cast to avoid warnings.
*/
int _pr_md_pipefd[2] = { -1, -1 };
static char _pr_md_pipebuf[PIPE_BUF];
static PRInt32 local_io_wait(PRInt32 osfd, PRInt32 wait_flag,
PRIntervalTime timeout);
_PRInterruptTable _pr_interruptTable[] = {
{
"clock", _PR_MISSED_CLOCK, _PR_ClockInterrupt, },
{
0 }
};
void _MD_unix_init_running_cpu(_PRCPU *cpu)
{
PR_INIT_CLIST(&(cpu->md.md_unix.ioQ));
cpu->md.md_unix.ioq_max_osfd = -1;
cpu->md.md_unix.ioq_timeout = PR_INTERVAL_NO_TIMEOUT;
}
PRStatus _MD_open_dir(_MDDir *d, const char *name)
{
int err;
d->d = opendir(name);
if (!d->d) {
err = _MD_ERRNO();
_PR_MD_MAP_OPENDIR_ERROR(err);
return PR_FAILURE;
}
return PR_SUCCESS;
}
PRInt32 _MD_close_dir(_MDDir *d)
{
int rv = 0, err;
if (d->d) {
rv = closedir(d->d);
if (rv == -1) {
err = _MD_ERRNO();
_PR_MD_MAP_CLOSEDIR_ERROR(err);
}
}
return rv;
}
char * _MD_read_dir(_MDDir *d, PRIntn flags)
{
struct dirent *de;
int err;
for (;;) {
/*
* XXX: readdir() is not MT-safe. There is an MT-safe version
* readdir_r() on some systems.
*/
_MD_ERRNO() = 0;
de = readdir(d->d);
if (!de) {
err = _MD_ERRNO();
_PR_MD_MAP_READDIR_ERROR(err);
return 0;
}
if ((flags & PR_SKIP_DOT) &&
(de->d_name[0] == '.') && (de->d_name[1] == 0))
continue;
if ((flags & PR_SKIP_DOT_DOT) &&
(de->d_name[0] == '.') && (de->d_name[1] == '.') &&
(de->d_name[2] == 0))
continue;
if ((flags & PR_SKIP_HIDDEN) && (de->d_name[0] == '.'))
continue;
break;
}
return de->d_name;
}
PRInt32 _MD_delete(const char *name)
{
PRInt32 rv, err;
#ifdef UNIXWARE
sigset_t set, oset;
#endif
#ifdef UNIXWARE
sigfillset(&set);
sigprocmask(SIG_SETMASK, &set, &oset);
#endif
rv = unlink(name);
#ifdef UNIXWARE
sigprocmask(SIG_SETMASK, &oset, NULL);
#endif
if (rv == -1) {
err = _MD_ERRNO();
_PR_MD_MAP_UNLINK_ERROR(err);
}
return(rv);
}
PRInt32 _MD_rename(const char *from, const char *to)
{
PRInt32 rv = -1, err;
/*
** This is trying to enforce the semantics of WINDOZE' rename
** operation. That means one is not allowed to rename over top
** of an existing file. Holding a lock across these two function
** and the open function is known to be a bad idea, but ....
*/
if (NULL != _pr_rename_lock)
PR_Lock(_pr_rename_lock);
if (0 == access(to, F_OK))
PR_SetError(PR_FILE_EXISTS_ERROR, 0);
else
{
rv = rename(from, to);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_RENAME_ERROR(err);
}
}
if (NULL != _pr_rename_lock)
PR_Unlock(_pr_rename_lock);
return rv;
}
PRInt32 _MD_access(const char *name, PRAccessHow how)
{
PRInt32 rv, err;
int amode;
switch (how) {
case PR_ACCESS_WRITE_OK:
amode = W_OK;
break;
case PR_ACCESS_READ_OK:
amode = R_OK;
break;
case PR_ACCESS_EXISTS:
amode = F_OK;
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
rv = -1;
goto done;
}
rv = access(name, amode);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_ACCESS_ERROR(err);
}
done:
return(rv);
}
PRInt32 _MD_mkdir(const char *name, PRIntn mode)
{
int rv, err;
/*
** This lock is used to enforce rename semantics as described
** in PR_Rename. Look there for more fun details.
*/
if (NULL !=_pr_rename_lock)
PR_Lock(_pr_rename_lock);
rv = mkdir(name, mode);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_MKDIR_ERROR(err);
}
if (NULL !=_pr_rename_lock)
PR_Unlock(_pr_rename_lock);
return rv;
}
PRInt32 _MD_rmdir(const char *name)
{
int rv, err;
rv = rmdir(name);
if (rv == -1) {
err = _MD_ERRNO();
_PR_MD_MAP_RMDIR_ERROR(err);
}
return rv;
}
PRInt32 _MD_read(PRFileDesc *fd, void *buf, PRInt32 amount)
{
PRThread *me = _PR_MD_CURRENT_THREAD();
PRInt32 rv, err;
#ifndef _PR_USE_POLL
fd_set rd;
#else
struct pollfd pfd;
#endif /* _PR_USE_POLL */
PRInt32 osfd = fd->secret->md.osfd;
#ifndef _PR_USE_POLL
FD_ZERO(&rd);
FD_SET(osfd, &rd);
#else
pfd.fd = osfd;
pfd.events = POLLIN;
#endif /* _PR_USE_POLL */
while ((rv = read(osfd,buf,amount)) == -1) {
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_READ,
PR_INTERVAL_NO_TIMEOUT)) < 0)
goto done;
} else {
#ifndef _PR_USE_POLL
while ((rv = _MD_SELECT(osfd + 1, &rd, NULL, NULL, NULL))
== -1 && (err = _MD_ERRNO()) == EINTR) {
/* retry _MD_SELECT() if it is interrupted */
}
#else /* _PR_USE_POLL */
while ((rv = _MD_POLL(&pfd, 1, -1))
== -1 && (err = _MD_ERRNO()) == EINTR) {
/* retry _MD_POLL() if it is interrupted */
}
#endif /* _PR_USE_POLL */
if (rv == -1) {
break;
}
}
if (_PR_PENDING_INTERRUPT(me))
break;
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
break;
}
}
if (rv < 0) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
_PR_MD_MAP_READ_ERROR(err);
}
}
done:
return(rv);
}
PRInt32 _MD_write(PRFileDesc *fd, const void *buf, PRInt32 amount)
{
PRThread *me = _PR_MD_CURRENT_THREAD();
PRInt32 rv, err;
#ifndef _PR_USE_POLL
fd_set wd;
#else
struct pollfd pfd;
#endif /* _PR_USE_POLL */
PRInt32 osfd = fd->secret->md.osfd;
#ifndef _PR_USE_POLL
FD_ZERO(&wd);
FD_SET(osfd, &wd);
#else
pfd.fd = osfd;
pfd.events = POLLOUT;
#endif /* _PR_USE_POLL */
while ((rv = write(osfd,buf,amount)) == -1) {
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE,
PR_INTERVAL_NO_TIMEOUT)) < 0)
goto done;
} else {
#ifndef _PR_USE_POLL
while ((rv = _MD_SELECT(osfd + 1, NULL, &wd, NULL, NULL))
== -1 && (err = _MD_ERRNO()) == EINTR) {
/* retry _MD_SELECT() if it is interrupted */
}
#else /* _PR_USE_POLL */
while ((rv = _MD_POLL(&pfd, 1, -1))
== -1 && (err = _MD_ERRNO()) == EINTR) {
/* retry _MD_POLL() if it is interrupted */
}
#endif /* _PR_USE_POLL */
if (rv == -1) {
break;
}
}
if (_PR_PENDING_INTERRUPT(me))
break;
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
break;
}
}
if (rv < 0) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
} else {
_PR_MD_MAP_WRITE_ERROR(err);
}
}
done:
return(rv);
}
PRInt32 _MD_fsync(PRFileDesc *fd)
{
PRInt32 rv, err;
rv = fsync(fd->secret->md.osfd);
if (rv == -1) {
err = _MD_ERRNO();
_PR_MD_MAP_FSYNC_ERROR(err);
}
return(rv);
}
PRInt32 _MD_close(PRInt32 osfd)
{
PRInt32 rv, err;
rv = close(osfd);
if (rv == -1) {
err = _MD_ERRNO();
_PR_MD_MAP_CLOSE_ERROR(err);
}
return(rv);
}
PRInt32 _MD_socket(PRInt32 domain, PRInt32 type, PRInt32 proto)
{
PRInt32 osfd, err;
osfd = socket(domain, type, proto);
if (osfd == -1) {
err = _MD_ERRNO();
_PR_MD_MAP_SOCKET_ERROR(err);
return(osfd);
}
return(osfd);
}
PRInt32 _MD_socketavailable(PRFileDesc *fd)
{
PRInt32 result;
if (ioctl(fd->secret->md.osfd, FIONREAD, &result) < 0) {
_PR_MD_MAP_SOCKETAVAILABLE_ERROR(_MD_ERRNO());
return -1;
}
return result;
}
PRInt64 _MD_socketavailable64(PRFileDesc *fd)
{
PRInt64 result;
LL_I2L(result, _MD_socketavailable(fd));
return result;
} /* _MD_socketavailable64 */
#define READ_FD 1
#define WRITE_FD 2
/*
* socket_io_wait --
*
* wait for socket i/o, periodically checking for interrupt
*
* The first implementation uses select(), for platforms without
* poll(). The second (preferred) implementation uses poll().
*/
#ifndef _PR_USE_POLL
static PRInt32 socket_io_wait(PRInt32 osfd, PRInt32 fd_type,
PRIntervalTime timeout)
{
PRInt32 rv = -1;
struct timeval tv;
PRThread *me = _PR_MD_CURRENT_THREAD();
PRIntervalTime epoch, now, elapsed, remaining;
PRBool wait_for_remaining;
PRInt32 syserror;
fd_set rd_wr;
switch (timeout) {
case PR_INTERVAL_NO_WAIT:
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
break;
case PR_INTERVAL_NO_TIMEOUT:
/*
* This is a special case of the 'default' case below.
* Please see the comments there.
*/
tv.tv_sec = _PR_INTERRUPT_CHECK_INTERVAL_SECS;
tv.tv_usec = 0;
FD_ZERO(&rd_wr);
do {
FD_SET(osfd, &rd_wr);
if (fd_type == READ_FD)
rv = _MD_SELECT(osfd + 1, &rd_wr, NULL, NULL, &tv);
else
rv = _MD_SELECT(osfd + 1, NULL, &rd_wr, NULL, &tv);
if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
_PR_MD_MAP_SELECT_ERROR(syserror);
break;
}
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
rv = -1;
break;
}
} while (rv == 0 || (rv == -1 && syserror == EINTR));
break;
default:
now = epoch = PR_IntervalNow();
remaining = timeout;
FD_ZERO(&rd_wr);
do {
/*
* We block in _MD_SELECT for at most
* _PR_INTERRUPT_CHECK_INTERVAL_SECS seconds,
* so that there is an upper limit on the delay
* before the interrupt bit is checked.
*/
wait_for_remaining = PR_TRUE;
tv.tv_sec = PR_IntervalToSeconds(remaining);
if (tv.tv_sec > _PR_INTERRUPT_CHECK_INTERVAL_SECS) {
wait_for_remaining = PR_FALSE;
tv.tv_sec = _PR_INTERRUPT_CHECK_INTERVAL_SECS;
tv.tv_usec = 0;
} else {
tv.tv_usec = PR_IntervalToMicroseconds(
remaining -
PR_SecondsToInterval(tv.tv_sec));
}
FD_SET(osfd, &rd_wr);
if (fd_type == READ_FD)
rv = _MD_SELECT(osfd + 1, &rd_wr, NULL, NULL, &tv);
else
rv = _MD_SELECT(osfd + 1, NULL, &rd_wr, NULL, &tv);
/*
* we don't consider EINTR a real error
*/
if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
_PR_MD_MAP_SELECT_ERROR(syserror);
break;
}
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
rv = -1;
break;
}
/*
* We loop again if _MD_SELECT timed out or got interrupted
* by a signal, and the timeout deadline has not passed yet.
*/
if (rv == 0 || (rv == -1 && syserror == EINTR)) {
/*
* If _MD_SELECT timed out, we know how much time
* we spent in blocking, so we can avoid a
* PR_IntervalNow() call.
*/
if (rv == 0) {
if (wait_for_remaining) {
now += remaining;
} else {
now += PR_SecondsToInterval(tv.tv_sec)
+ PR_MicrosecondsToInterval(tv.tv_usec);
}
} else {
now = PR_IntervalNow();
}
elapsed = (PRIntervalTime) (now - epoch);
if (elapsed >= timeout) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
rv = -1;
break;
} else {
remaining = timeout - elapsed;
}
}
} while (rv == 0 || (rv == -1 && syserror == EINTR));
break;
}
return(rv);
}
#else /* _PR_USE_POLL */
static PRInt32 socket_io_wait(PRInt32 osfd, PRInt32 fd_type,
PRIntervalTime timeout)
{
PRInt32 rv = -1;
int msecs;
PRThread *me = _PR_MD_CURRENT_THREAD();
PRIntervalTime epoch, now, elapsed, remaining;
PRBool wait_for_remaining;
PRInt32 syserror;
struct pollfd pfd;
switch (timeout) {
case PR_INTERVAL_NO_WAIT:
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
break;
case PR_INTERVAL_NO_TIMEOUT:
/*
* This is a special case of the 'default' case below.
* Please see the comments there.
*/
msecs = _PR_INTERRUPT_CHECK_INTERVAL_SECS * 1000;
pfd.fd = osfd;
if (fd_type == READ_FD) {
pfd.events = POLLIN;
} else {
pfd.events = POLLOUT;
}
do {
rv = _MD_POLL(&pfd, 1, msecs);
if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
_PR_MD_MAP_POLL_ERROR(syserror);
break;
}
/*
* If POLLERR is set, don't process it; retry the operation
*/
if ((rv == 1) && (pfd.revents & (POLLHUP | POLLNVAL))) {
rv = -1;
_PR_MD_MAP_POLL_REVENTS_ERROR(pfd.revents);
break;
}
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
rv = -1;
break;
}
} while (rv == 0 || (rv == -1 && syserror == EINTR));
break;
default:
now = epoch = PR_IntervalNow();
remaining = timeout;
pfd.fd = osfd;
if (fd_type == READ_FD) {
pfd.events = POLLIN;
} else {
pfd.events = POLLOUT;
}
do {
/*
* We block in _MD_POLL for at most
* _PR_INTERRUPT_CHECK_INTERVAL_SECS seconds,
* so that there is an upper limit on the delay
* before the interrupt bit is checked.
*/
wait_for_remaining = PR_TRUE;
msecs = PR_IntervalToMilliseconds(remaining);
if (msecs > _PR_INTERRUPT_CHECK_INTERVAL_SECS * 1000) {
wait_for_remaining = PR_FALSE;
msecs = _PR_INTERRUPT_CHECK_INTERVAL_SECS * 1000;
}
rv = _MD_POLL(&pfd, 1, msecs);
/*
* we don't consider EINTR a real error
*/
if (rv == -1 && (syserror = _MD_ERRNO()) != EINTR) {
_PR_MD_MAP_POLL_ERROR(syserror);
break;
}
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
rv = -1;
break;
}
/*
* If POLLERR is set, don't process it; retry the operation
*/
if ((rv == 1) && (pfd.revents & (POLLHUP | POLLNVAL))) {
rv = -1;
_PR_MD_MAP_POLL_REVENTS_ERROR(pfd.revents);
break;
}
/*
* We loop again if _MD_POLL timed out or got interrupted
* by a signal, and the timeout deadline has not passed yet.
*/
if (rv == 0 || (rv == -1 && syserror == EINTR)) {
/*
* If _MD_POLL timed out, we know how much time
* we spent in blocking, so we can avoid a
* PR_IntervalNow() call.
*/
if (rv == 0) {
if (wait_for_remaining) {
now += remaining;
} else {
now += PR_MillisecondsToInterval(msecs);
}
} else {
now = PR_IntervalNow();
}
elapsed = (PRIntervalTime) (now - epoch);
if (elapsed >= timeout) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
rv = -1;
break;
} else {
remaining = timeout - elapsed;
}
}
} while (rv == 0 || (rv == -1 && syserror == EINTR));
break;
}
return(rv);
}
#endif /* _PR_USE_POLL */
static PRInt32 local_io_wait(
PRInt32 osfd,
PRInt32 wait_flag,
PRIntervalTime timeout)
{
_PRUnixPollDesc pd;
PRInt32 rv;
PR_LOG(_pr_io_lm, PR_LOG_MIN,
("waiting to %s on osfd=%d",
(wait_flag == _PR_UNIX_POLL_READ) ? "read" : "write",
osfd));
if (timeout == PR_INTERVAL_NO_WAIT) return 0;
pd.osfd = osfd;
pd.in_flags = wait_flag;
pd.out_flags = 0;
rv = _PR_WaitForMultipleFDs(&pd, 1, timeout);
if (rv == 0) {
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
rv = -1;
}
return rv;
}
PRInt32 _MD_recv(PRFileDesc *fd, void *buf, PRInt32 amount,
PRInt32 flags, PRIntervalTime timeout)
{
PRInt32 osfd = fd->secret->md.osfd;
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
/*
* Many OS's (Solaris, Unixware) have a broken recv which won't read
* from socketpairs. As long as we don't use flags on socketpairs, this
* is a decent fix. - mikep
*/
#if defined(UNIXWARE) || defined(SOLARIS) || defined(NCR)
while ((rv = read(osfd,buf,amount)) == -1) {
#else
while ((rv = recv(osfd,buf,amount,flags)) == -1) {
#endif
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd,_PR_UNIX_POLL_READ,timeout)) < 0)
goto done;
} else {
if ((rv = socket_io_wait(osfd, READ_FD, timeout)) < 0)
goto done;
}
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
break;
}
}
if (rv < 0) {
_PR_MD_MAP_RECV_ERROR(err);
}
done:
return(rv);
}
PRInt32 _MD_recvfrom(PRFileDesc *fd, void *buf, PRInt32 amount,
PRIntn flags, PRNetAddr *addr, PRUint32 *addrlen,
PRIntervalTime timeout)
{
PRInt32 osfd = fd->secret->md.osfd;
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
while ((*addrlen = PR_NETADDR_SIZE(addr)),
((rv = recvfrom(osfd, buf, amount, flags,
(struct sockaddr *) addr, (_PRSockLen_t *)addrlen)) == -1)) {
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_READ, timeout)) < 0)
goto done;
} else {
if ((rv = socket_io_wait(osfd, READ_FD, timeout)) < 0)
goto done;
}
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
break;
}
}
if (rv < 0) {
_PR_MD_MAP_RECVFROM_ERROR(err);
}
done:
#ifdef _PR_HAVE_SOCKADDR_LEN
if (rv != -1) {
/* ignore the sa_len field of struct sockaddr */
if (addr) {
addr->raw.family = ((struct sockaddr *) addr)->sa_family;
}
}
#endif /* _PR_HAVE_SOCKADDR_LEN */
return(rv);
}
PRInt32 _MD_send(PRFileDesc *fd, const void *buf, PRInt32 amount,
PRInt32 flags, PRIntervalTime timeout)
{
PRInt32 osfd = fd->secret->md.osfd;
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
#if defined(SOLARIS)
PRInt32 tmp_amount = amount;
#endif
/*
* On pre-2.6 Solaris, send() is much slower than write().
* On 2.6 and beyond, with in-kernel sockets, send() and
* write() are fairly equivalent in performance.
*/
#if defined(SOLARIS)
PR_ASSERT(0 == flags);
while ((rv = write(osfd,buf,tmp_amount)) == -1) {
#else
while ((rv = send(osfd,buf,amount,flags)) == -1) {
#endif
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
goto done;
} else {
if ((rv = socket_io_wait(osfd, WRITE_FD, timeout))< 0)
goto done;
}
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
#if defined(SOLARIS)
/*
* The write system call has been reported to return the ERANGE
* error on occasion. Try to write in smaller chunks to workaround
* this bug.
*/
if (err == ERANGE) {
if (tmp_amount > 1) {
tmp_amount = tmp_amount/2; /* half the bytes */
continue;
}
}
#endif
break;
}
}
/*
* optimization; if bytes sent is less than "amount" call
* select before returning. This is because it is likely that
* the next send() call will return EWOULDBLOCK.
*/
if ((!fd->secret->nonblocking) && (rv > 0) && (rv < amount)
&& (timeout != PR_INTERVAL_NO_WAIT)) {
if (_PR_IS_NATIVE_THREAD(me)) {
if (socket_io_wait(osfd, WRITE_FD, timeout)< 0) {
rv = -1;
goto done;
}
} else {
if (local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout) < 0) {
rv = -1;
goto done;
}
}
}
if (rv < 0) {
_PR_MD_MAP_SEND_ERROR(err);
}
done:
return(rv);
}
PRInt32 _MD_sendto(
PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout)
{
PRInt32 osfd = fd->secret->md.osfd;
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
#ifdef _PR_HAVE_SOCKADDR_LEN
PRNetAddr addrCopy;
addrCopy = *addr;
((struct sockaddr *) &addrCopy)->sa_len = addrlen;
((struct sockaddr *) &addrCopy)->sa_family = addr->raw.family;
while ((rv = sendto(osfd, buf, amount, flags,
(struct sockaddr *) &addrCopy, addrlen)) == -1) {
#else
while ((rv = sendto(osfd, buf, amount, flags,
(struct sockaddr *) addr, addrlen)) == -1) {
#endif
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
goto done;
} else {
if ((rv = socket_io_wait(osfd, WRITE_FD, timeout))< 0)
goto done;
}
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
break;
}
}
if (rv < 0) {
_PR_MD_MAP_SENDTO_ERROR(err);
}
done:
return(rv);
}
PRInt32 _MD_writev(
PRFileDesc *fd, const PRIOVec *iov,
PRInt32 iov_size, PRIntervalTime timeout)
{
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
PRInt32 index, amount = 0;
PRInt32 osfd = fd->secret->md.osfd;
/*
* Calculate the total number of bytes to be sent; needed for
* optimization later.
* We could avoid this if this number was passed in; but it is
* probably not a big deal because iov_size is usually small (less than
* 3)
*/
if (!fd->secret->nonblocking) {
for (index=0; index<iov_size; index++) {
amount += iov[index].iov_len;
}
}
while ((rv = writev(osfd, (const struct iovec*)iov, iov_size)) == -1) {
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
goto done;
} else {
if ((rv = socket_io_wait(osfd, WRITE_FD, timeout))<0)
goto done;
}
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
break;
}
}
/*
* optimization; if bytes sent is less than "amount" call
* select before returning. This is because it is likely that
* the next writev() call will return EWOULDBLOCK.
*/
if ((!fd->secret->nonblocking) && (rv > 0) && (rv < amount)
&& (timeout != PR_INTERVAL_NO_WAIT)) {
if (_PR_IS_NATIVE_THREAD(me)) {
if (socket_io_wait(osfd, WRITE_FD, timeout) < 0) {
rv = -1;
goto done;
}
} else {
if (local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout) < 0) {
rv = -1;
goto done;
}
}
}
if (rv < 0) {
_PR_MD_MAP_WRITEV_ERROR(err);
}
done:
return(rv);
}
PRInt32 _MD_accept(PRFileDesc *fd, PRNetAddr *addr,
PRUint32 *addrlen, PRIntervalTime timeout)
{
PRInt32 osfd = fd->secret->md.osfd;
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
while ((rv = accept(osfd, (struct sockaddr *) addr,
(_PRSockLen_t *)addrlen)) == -1) {
err = _MD_ERRNO();
if ((err == EAGAIN) || (err == EWOULDBLOCK) || (err == ECONNABORTED)) {
if (fd->secret->nonblocking) {
break;
}
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_READ, timeout)) < 0)
goto done;
} else {
if ((rv = socket_io_wait(osfd, READ_FD, timeout)) < 0)
goto done;
}
} else if ((err == EINTR) && (!_PR_PENDING_INTERRUPT(me))){
continue;
} else {
break;
}
}
if (rv < 0) {
_PR_MD_MAP_ACCEPT_ERROR(err);
}
done:
#ifdef _PR_HAVE_SOCKADDR_LEN
if (rv != -1) {
/* ignore the sa_len field of struct sockaddr */
if (addr) {
addr->raw.family = ((struct sockaddr *) addr)->sa_family;
}
}
#endif /* _PR_HAVE_SOCKADDR_LEN */
return(rv);
}
extern int _connect (int s, const struct sockaddr *name, int namelen);
PRInt32 _MD_connect(
PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen, PRIntervalTime timeout)
{
PRInt32 rv, err;
PRThread *me = _PR_MD_CURRENT_THREAD();
PRInt32 osfd = fd->secret->md.osfd;
#ifdef IRIX
extern PRInt32 _MD_irix_connect(
PRInt32 osfd, const PRNetAddr *addr, PRInt32 addrlen, PRIntervalTime timeout);
#endif
#ifdef _PR_HAVE_SOCKADDR_LEN
PRNetAddr addrCopy;
addrCopy = *addr;
((struct sockaddr *) &addrCopy)->sa_len = addrlen;
((struct sockaddr *) &addrCopy)->sa_family = addr->raw.family;
#endif
/*
* We initiate the connection setup by making a nonblocking connect()
* call. If the connect() call fails, there are two cases we handle
* specially:
* 1. The connect() call was interrupted by a signal. In this case
* we simply retry connect().
* 2. The NSPR socket is nonblocking and connect() fails with
* EINPROGRESS. We first wait until the socket becomes writable.
* Then we try to find out whether the connection setup succeeded
* or failed.
*/
retry:
#ifdef IRIX
if ((rv = _MD_irix_connect(osfd, addr, addrlen, timeout)) == -1) {
#else
#ifdef _PR_HAVE_SOCKADDR_LEN
if ((rv = connect(osfd, (struct sockaddr *)&addrCopy, addrlen)) == -1) {
#else
if ((rv = connect(osfd, (struct sockaddr *)addr, addrlen)) == -1) {
#endif
#endif
err = _MD_ERRNO();
if (err == EINTR) {
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError( PR_PENDING_INTERRUPT_ERROR, 0);
return -1;
}
goto retry;
}
if (!fd->secret->nonblocking && (err == EINPROGRESS)) {
if (!_PR_IS_NATIVE_THREAD(me)) {
if ((rv = local_io_wait(osfd, _PR_UNIX_POLL_WRITE, timeout)) < 0)
return -1;
} else {
/*
* socket_io_wait() may return -1 or 1.
*/
rv = socket_io_wait(osfd, WRITE_FD, timeout);
if (rv == -1) {
return -1;
}
}
PR_ASSERT(rv == 1);
if (_PR_PENDING_INTERRUPT(me)) {
me->flags &= ~_PR_INTERRUPT;
PR_SetError( PR_PENDING_INTERRUPT_ERROR, 0);
return -1;
}
err = _MD_unix_get_nonblocking_connect_error(osfd);
if (err != 0) {
_PR_MD_MAP_CONNECT_ERROR(err);
return -1;
}
return 0;
}
_PR_MD_MAP_CONNECT_ERROR(err);
}
return rv;
} /* _MD_connect */
PRInt32 _MD_bind(PRFileDesc *fd, const PRNetAddr *addr, PRUint32 addrlen)
{
PRInt32 rv, err;
#ifdef _PR_HAVE_SOCKADDR_LEN
PRNetAddr addrCopy;
addrCopy = *addr;
((struct sockaddr *) &addrCopy)->sa_len = addrlen;
((struct sockaddr *) &addrCopy)->sa_family = addr->raw.family;
rv = bind(fd->secret->md.osfd, (struct sockaddr *) &addrCopy, (int )addrlen);
#else
rv = bind(fd->secret->md.osfd, (struct sockaddr *) addr, (int )addrlen);
#endif
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_BIND_ERROR(err);
}
return(rv);
}
PRInt32 _MD_listen(PRFileDesc *fd, PRIntn backlog)
{
PRInt32 rv, err;
rv = listen(fd->secret->md.osfd, backlog);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_LISTEN_ERROR(err);
}
return(rv);
}
PRInt32 _MD_shutdown(PRFileDesc *fd, PRIntn how)
{
PRInt32 rv, err;
rv = shutdown(fd->secret->md.osfd, how);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_SHUTDOWN_ERROR(err);
}
return(rv);
}
PRInt32 _MD_socketpair(int af, int type, int flags,
PRInt32 *osfd)
{
PRInt32 rv, err;
rv = socketpair(af, type, flags, osfd);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_SOCKETPAIR_ERROR(err);
}
return rv;
}
PRStatus _MD_getsockname(PRFileDesc *fd, PRNetAddr *addr,
PRUint32 *addrlen)
{
PRInt32 rv, err;
rv = getsockname(fd->secret->md.osfd,
(struct sockaddr *) addr, (_PRSockLen_t *)addrlen);
#ifdef _PR_HAVE_SOCKADDR_LEN
if (rv == 0) {
/* ignore the sa_len field of struct sockaddr */
if (addr) {
addr->raw.family = ((struct sockaddr *) addr)->sa_family;
}
}
#endif /* _PR_HAVE_SOCKADDR_LEN */
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_GETSOCKNAME_ERROR(err);
}
return rv==0?PR_SUCCESS:PR_FAILURE;
}
PRStatus _MD_getpeername(PRFileDesc *fd, PRNetAddr *addr,
PRUint32 *addrlen)
{
PRInt32 rv, err;
rv = getpeername(fd->secret->md.osfd,
(struct sockaddr *) addr, (_PRSockLen_t *)addrlen);
#ifdef _PR_HAVE_SOCKADDR_LEN
if (rv == 0) {
/* ignore the sa_len field of struct sockaddr */
if (addr) {
addr->raw.family = ((struct sockaddr *) addr)->sa_family;
}
}
#endif /* _PR_HAVE_SOCKADDR_LEN */
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_GETPEERNAME_ERROR(err);
}
return rv==0?PR_SUCCESS:PR_FAILURE;
}
PRStatus _MD_getsockopt(PRFileDesc *fd, PRInt32 level,
PRInt32 optname, char* optval, PRInt32* optlen)
{
PRInt32 rv, err;
rv = getsockopt(fd->secret->md.osfd, level, optname, optval, (_PRSockLen_t *)optlen);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_GETSOCKOPT_ERROR(err);
}
return rv==0?PR_SUCCESS:PR_FAILURE;
}
PRStatus _MD_setsockopt(PRFileDesc *fd, PRInt32 level,
PRInt32 optname, const char* optval, PRInt32 optlen)
{
PRInt32 rv, err;
rv = setsockopt(fd->secret->md.osfd, level, optname, optval, optlen);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_SETSOCKOPT_ERROR(err);
}
return rv==0?PR_SUCCESS:PR_FAILURE;
}
PRStatus _MD_set_fd_inheritable(PRFileDesc *fd, PRBool inheritable)
{
int rv;
rv = fcntl(fd->secret->md.osfd, F_SETFD, inheritable ? 0 : FD_CLOEXEC);
if (-1 == rv) {
PR_SetError(PR_UNKNOWN_ERROR, _MD_ERRNO());
return PR_FAILURE;
}
return PR_SUCCESS;
}
void _MD_init_fd_inheritable(PRFileDesc *fd, PRBool imported)
{
if (imported) {
fd->secret->inheritable = _PR_TRI_UNKNOWN;
} else {
/* By default, a Unix fd is not closed on exec. */
#ifdef DEBUG
{
int flags = fcntl(fd->secret->md.osfd, F_GETFD, 0);
PR_ASSERT(0 == flags);
}
#endif
fd->secret->inheritable = _PR_TRI_TRUE;
}
}
/************************************************************************/
#if !defined(_PR_USE_POLL)
/*
** Scan through io queue and find any bad fd's that triggered the error
** from _MD_SELECT
*/
static void FindBadFDs(void)
{
PRCList *q;
PRThread *me = _MD_CURRENT_THREAD();
PR_ASSERT(!_PR_IS_NATIVE_THREAD(me));
q = (_PR_IOQ(me->cpu)).next;
_PR_IOQ_MAX_OSFD(me->cpu) = -1;
_PR_IOQ_TIMEOUT(me->cpu) = PR_INTERVAL_NO_TIMEOUT;
while (q != &_PR_IOQ(me->cpu)) {
PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
PRBool notify = PR_FALSE;
_PRUnixPollDesc *pds = pq->pds;
_PRUnixPollDesc *epds = pds + pq->npds;
PRInt32 pq_max_osfd = -1;
q = q->next;
for (; pds < epds; pds++) {
PRInt32 osfd = pds->osfd;
pds->out_flags = 0;
PR_ASSERT(osfd >= 0 || pds->in_flags == 0);
if (pds->in_flags == 0) {
continue; /* skip this fd */
}
if (fcntl(osfd, F_GETFL, 0) == -1) {
/* Found a bad descriptor, remove it from the fd_sets. */
PR_LOG(_pr_io_lm, PR_LOG_MAX,
("file descriptor %d is bad", osfd));
pds->out_flags = _PR_UNIX_POLL_NVAL;
notify = PR_TRUE;
}
if (osfd > pq_max_osfd) {
pq_max_osfd = osfd;
}
}
if (notify) {
PRIntn pri;
PR_REMOVE_LINK(&pq->links);
pq->on_ioq = PR_FALSE;
/*
* Decrement the count of descriptors for each desciptor/event
* because this I/O request is being removed from the
* ioq
*/
pds = pq->pds;
for (; pds < epds; pds++) {
PRInt32 osfd = pds->osfd;
PRInt16 in_flags = pds->in_flags;
PR_ASSERT(osfd >= 0 || in_flags == 0);
if (in_flags & _PR_UNIX_POLL_READ) {
if (--(_PR_FD_READ_CNT(me->cpu))[osfd] == 0)
FD_CLR(osfd, &_PR_FD_READ_SET(me->cpu));
}
if (in_flags & _PR_UNIX_POLL_WRITE) {
if (--(_PR_FD_WRITE_CNT(me->cpu))[osfd] == 0)
FD_CLR(osfd, &_PR_FD_WRITE_SET(me->cpu));
}
if (in_flags & _PR_UNIX_POLL_EXCEPT) {
if (--(_PR_FD_EXCEPTION_CNT(me->cpu))[osfd] == 0)
FD_CLR(osfd, &_PR_FD_EXCEPTION_SET(me->cpu));
}
}
_PR_THREAD_LOCK(pq->thr);
if (pq->thr->flags & (_PR_ON_PAUSEQ|_PR_ON_SLEEPQ)) {
_PRCPU *cpu = pq->thr->cpu;
_PR_SLEEPQ_LOCK(pq->thr->cpu);
_PR_DEL_SLEEPQ(pq->thr, PR_TRUE);
_PR_SLEEPQ_UNLOCK(pq->thr->cpu);
if (pq->thr->flags & _PR_SUSPENDING) {
/*
* set thread state to SUSPENDED;
* a Resume operation on the thread
* will move it to the runQ
*/
pq->thr->state = _PR_SUSPENDED;
_PR_MISCQ_LOCK(pq->thr->cpu);
_PR_ADD_SUSPENDQ(pq->thr, pq->thr->cpu);
_PR_MISCQ_UNLOCK(pq->thr->cpu);
} else {
pri = pq->thr->priority;
pq->thr->state = _PR_RUNNABLE;
_PR_RUNQ_LOCK(cpu);
_PR_ADD_RUNQ(pq->thr, cpu, pri);
_PR_RUNQ_UNLOCK(cpu);
}
}
_PR_THREAD_UNLOCK(pq->thr);
} else {
if (pq->timeout < _PR_IOQ_TIMEOUT(me->cpu))
_PR_IOQ_TIMEOUT(me->cpu) = pq->timeout;
if (_PR_IOQ_MAX_OSFD(me->cpu) < pq_max_osfd)
_PR_IOQ_MAX_OSFD(me->cpu) = pq_max_osfd;
}
}
if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_md_pipefd[0])
_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
}
}
#endif /* !defined(_PR_USE_POLL) */
/************************************************************************/
/*
** Called by the scheduler when there is nothing to do. This means that
** all threads are blocked on some monitor somewhere.
**
** Note: this code doesn't release the scheduler lock.
*/
/*
** Pause the current CPU. longjmp to the cpu's pause stack
**
** This must be called with the scheduler locked
*/
void _MD_PauseCPU(PRIntervalTime ticks)
{
PRThread *me = _MD_CURRENT_THREAD();
#ifdef _PR_USE_POLL
int timeout;
struct pollfd *pollfds; /* an array of pollfd structures */
struct pollfd *pollfdPtr; /* a pointer that steps through the array */
unsigned long npollfds; /* number of pollfd structures in array */
unsigned long pollfds_size;
int nfd; /* to hold the return value of poll() */
#else
struct timeval timeout, *tvp;
fd_set r, w, e;
fd_set *rp, *wp, *ep;
PRInt32 max_osfd, nfd;
#endif /* _PR_USE_POLL */
PRInt32 rv;
PRCList *q;
PRUint32 min_timeout;
sigset_t oldset;
#ifdef IRIX
extern sigset_t ints_off;
#endif
PR_ASSERT(_PR_MD_GET_INTSOFF() != 0);
_PR_MD_IOQ_LOCK();
#ifdef _PR_USE_POLL
/* Build up the pollfd structure array to wait on */
/* Find out how many pollfd structures are needed */
npollfds = _PR_IOQ_OSFD_CNT(me->cpu);
PR_ASSERT(npollfds >= 0);
/*
* We use a pipe to wake up a native thread. An fd is needed
* for the pipe and we poll it for reading.
*/
if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
npollfds++;
#ifdef IRIX
/*
* On Irix, a second pipe is used to cause the primordial cpu to
* wakeup and exit, when the process is exiting because of a call
* to exit/PR_ProcessExit.
*/
if (me->cpu->id == 0) {
npollfds++;
}
#endif
}
/*
* if the cpu's pollfd array is not big enough, release it and allocate a new one
*/
if (npollfds > _PR_IOQ_POLLFDS_SIZE(me->cpu)) {
if (_PR_IOQ_POLLFDS(me->cpu) != NULL)
PR_DELETE(_PR_IOQ_POLLFDS(me->cpu));
pollfds_size = PR_MAX(_PR_IOQ_MIN_POLLFDS_SIZE(me->cpu), npollfds);
pollfds = (struct pollfd *) PR_MALLOC(pollfds_size * sizeof(struct pollfd));
_PR_IOQ_POLLFDS(me->cpu) = pollfds;
_PR_IOQ_POLLFDS_SIZE(me->cpu) = pollfds_size;
} else {
pollfds = _PR_IOQ_POLLFDS(me->cpu);
}
pollfdPtr = pollfds;
/*
* If we need to poll the pipe for waking up a native thread,
* the pipe's fd is the first element in the pollfds array.
*/
if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
pollfdPtr->fd = _pr_md_pipefd[0];
pollfdPtr->events = POLLIN;
pollfdPtr++;
#ifdef IRIX
/*
* On Irix, the second element is the exit pipe
*/
if (me->cpu->id == 0) {
pollfdPtr->fd = _pr_irix_primoridal_cpu_fd[0];
pollfdPtr->events = POLLIN;
pollfdPtr++;
}
#endif
}
min_timeout = PR_INTERVAL_NO_TIMEOUT;
for (q = _PR_IOQ(me->cpu).next; q != &_PR_IOQ(me->cpu); q = q->next) {
PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
_PRUnixPollDesc *pds = pq->pds;
_PRUnixPollDesc *epds = pds + pq->npds;
if (pq->timeout < min_timeout) {
min_timeout = pq->timeout;
}
for (; pds < epds; pds++, pollfdPtr++) {
/*
* Assert that the pollfdPtr pointer does not go
* beyond the end of the pollfds array
*/
PR_ASSERT(pollfdPtr < pollfds + npollfds);
pollfdPtr->fd = pds->osfd;
/* direct copy of poll flags */
pollfdPtr->events = pds->in_flags;
}
}
_PR_IOQ_TIMEOUT(me->cpu) = min_timeout;
#else
/*
* assigment of fd_sets
*/
r = _PR_FD_READ_SET(me->cpu);
w = _PR_FD_WRITE_SET(me->cpu);
e = _PR_FD_EXCEPTION_SET(me->cpu);
rp = &r;
wp = &w;
ep = &e;
max_osfd = _PR_IOQ_MAX_OSFD(me->cpu) + 1;
min_timeout = _PR_IOQ_TIMEOUT(me->cpu);
#endif /* _PR_USE_POLL */
/*
** Compute the minimum timeout value: make it the smaller of the
** timeouts specified by the i/o pollers or the timeout of the first
** sleeping thread.
*/
q = _PR_SLEEPQ(me->cpu).next;
if (q != &_PR_SLEEPQ(me->cpu)) {
PRThread *t = _PR_THREAD_PTR(q);
if (t->sleep < min_timeout) {
min_timeout = t->sleep;
}
}
if (min_timeout > ticks) {
min_timeout = ticks;
}
#ifdef _PR_USE_POLL
if (min_timeout == PR_INTERVAL_NO_TIMEOUT)
timeout = -1;
else
timeout = PR_IntervalToMilliseconds(min_timeout);
#else
if (min_timeout == PR_INTERVAL_NO_TIMEOUT) {
tvp = NULL;
} else {
timeout.tv_sec = PR_IntervalToSeconds(min_timeout);
timeout.tv_usec = PR_IntervalToMicroseconds(min_timeout)
% PR_USEC_PER_SEC;
tvp = &timeout;
}
#endif /* _PR_USE_POLL */
_PR_MD_IOQ_UNLOCK();
_MD_CHECK_FOR_EXIT();
/*
* check for i/o operations
*/
#ifndef _PR_NO_CLOCK_TIMER
/*
* Disable the clock interrupts while we are in select, if clock interrupts
* are enabled. Otherwise, when the select/poll calls are interrupted, the
* timer value starts ticking from zero again when the system call is restarted.
*/
#ifdef IRIX
/*
* SIGCHLD signal is used on Irix to detect he termination of an
* sproc by SIGSEGV, SIGBUS or SIGABRT signals when
* _nspr_terminate_on_error is set.
*/
if ((!_nspr_noclock) || (_nspr_terminate_on_error))
#else
if (!_nspr_noclock)
#endif /* IRIX */
#ifdef IRIX
sigprocmask(SIG_BLOCK, &ints_off, &oldset);
#else
PR_ASSERT(sigismember(&timer_set, SIGALRM));
sigprocmask(SIG_BLOCK, &timer_set, &oldset);
#endif /* IRIX */
#endif /* !_PR_NO_CLOCK_TIMER */
#ifndef _PR_USE_POLL
PR_ASSERT(FD_ISSET(_pr_md_pipefd[0],rp));
nfd = _MD_SELECT(max_osfd, rp, wp, ep, tvp);
#else
nfd = _MD_POLL(pollfds, npollfds, timeout);
#endif /* !_PR_USE_POLL */
#ifndef _PR_NO_CLOCK_TIMER
#ifdef IRIX
if ((!_nspr_noclock) || (_nspr_terminate_on_error))
#else
if (!_nspr_noclock)
#endif /* IRIX */
sigprocmask(SIG_SETMASK, &oldset, 0);
#endif /* !_PR_NO_CLOCK_TIMER */
_MD_CHECK_FOR_EXIT();
#ifdef IRIX
_PR_MD_primordial_cpu();
#endif
_PR_MD_IOQ_LOCK();
/*
** Notify monitors that are associated with the selected descriptors.
*/
#ifdef _PR_USE_POLL
if (nfd > 0) {
pollfdPtr = pollfds;
if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
/*
* Assert that the pipe is the first element in the
* pollfds array.
*/
PR_ASSERT(pollfds[0].fd == _pr_md_pipefd[0]);
if ((pollfds[0].revents & POLLIN) && (nfd == 1)) {
/*
* woken up by another thread; read all the data
* in the pipe to empty the pipe
*/
while ((rv = read(_pr_md_pipefd[0], _pr_md_pipebuf,
PIPE_BUF)) == PIPE_BUF){
}
PR_ASSERT((rv > 0) || ((rv == -1) && (errno == EAGAIN)));
}
pollfdPtr++;
#ifdef IRIX
/*
* On Irix, check to see if the primordial cpu needs to exit
* to cause the process to terminate
*/
if (me->cpu->id == 0) {
PR_ASSERT(pollfds[1].fd == _pr_irix_primoridal_cpu_fd[0]);
if (pollfdPtr->revents & POLLIN) {
if (_pr_irix_process_exit) {
/*
* process exit due to a call to PR_ProcessExit
*/
prctl(PR_SETEXITSIG, SIGKILL);
_exit(_pr_irix_process_exit_code);
} else {
while ((rv = read(_pr_irix_primoridal_cpu_fd[0],
_pr_md_pipebuf, PIPE_BUF)) == PIPE_BUF) {
}
PR_ASSERT(rv > 0);
}
}
pollfdPtr++;
}
#endif
}
for (q = _PR_IOQ(me->cpu).next; q != &_PR_IOQ(me->cpu); q = q->next) {
PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
PRBool notify = PR_FALSE;
_PRUnixPollDesc *pds = pq->pds;
_PRUnixPollDesc *epds = pds + pq->npds;
for (; pds < epds; pds++, pollfdPtr++) {
/*
* Assert that the pollfdPtr pointer does not go beyond
* the end of the pollfds array.
*/
PR_ASSERT(pollfdPtr < pollfds + npollfds);
/*
* Assert that the fd's in the pollfds array (stepped
* through by pollfdPtr) are in the same order as
* the fd's in _PR_IOQ() (stepped through by q and pds).
* This is how the pollfds array was created earlier.
*/
PR_ASSERT(pollfdPtr->fd == pds->osfd);
pds->out_flags = pollfdPtr->revents;
/* Negative fd's are ignored by poll() */
if (pds->osfd >= 0 && pds->out_flags) {
notify = PR_TRUE;
}
}
if (notify) {
PRIntn pri;
PRThread *thred;
PR_REMOVE_LINK(&pq->links);
pq->on_ioq = PR_FALSE;
thred = pq->thr;
_PR_THREAD_LOCK(thred);
if (pq->thr->flags & (_PR_ON_PAUSEQ|_PR_ON_SLEEPQ)) {
_PRCPU *cpu = pq->thr->cpu;
_PR_SLEEPQ_LOCK(pq->thr->cpu);
_PR_DEL_SLEEPQ(pq->thr, PR_TRUE);
_PR_SLEEPQ_UNLOCK(pq->thr->cpu);
if (pq->thr->flags & _PR_SUSPENDING) {
/*
* set thread state to SUSPENDED;
* a Resume operation on the thread
* will move it to the runQ
*/
pq->thr->state = _PR_SUSPENDED;
_PR_MISCQ_LOCK(pq->thr->cpu);
_PR_ADD_SUSPENDQ(pq->thr, pq->thr->cpu);
_PR_MISCQ_UNLOCK(pq->thr->cpu);
} else {
pri = pq->thr->priority;
pq->thr->state = _PR_RUNNABLE;
_PR_RUNQ_LOCK(cpu);
_PR_ADD_RUNQ(pq->thr, cpu, pri);
_PR_RUNQ_UNLOCK(cpu);
if (_pr_md_idle_cpus > 1)
_PR_MD_WAKEUP_WAITER(thred);
}
}
_PR_THREAD_UNLOCK(thred);
_PR_IOQ_OSFD_CNT(me->cpu) -= pq->npds;
PR_ASSERT(_PR_IOQ_OSFD_CNT(me->cpu) >= 0);
}
}
} else if (nfd == -1) {
PR_LOG(_pr_io_lm, PR_LOG_MAX, ("poll() failed with errno %d", errno));
}
#else
if (nfd > 0) {
q = _PR_IOQ(me->cpu).next;
_PR_IOQ_MAX_OSFD(me->cpu) = -1;
_PR_IOQ_TIMEOUT(me->cpu) = PR_INTERVAL_NO_TIMEOUT;
while (q != &_PR_IOQ(me->cpu)) {
PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
PRBool notify = PR_FALSE;
_PRUnixPollDesc *pds = pq->pds;
_PRUnixPollDesc *epds = pds + pq->npds;
PRInt32 pq_max_osfd = -1;
q = q->next;
for (; pds < epds; pds++) {
PRInt32 osfd = pds->osfd;
PRInt16 in_flags = pds->in_flags;
PRInt16 out_flags = 0;
PR_ASSERT(osfd >= 0 || in_flags == 0);
if ((in_flags & _PR_UNIX_POLL_READ) && FD_ISSET(osfd, rp)) {
out_flags |= _PR_UNIX_POLL_READ;
}
if ((in_flags & _PR_UNIX_POLL_WRITE) && FD_ISSET(osfd, wp)) {
out_flags |= _PR_UNIX_POLL_WRITE;
}
if ((in_flags & _PR_UNIX_POLL_EXCEPT) && FD_ISSET(osfd, ep)) {
out_flags |= _PR_UNIX_POLL_EXCEPT;
}
pds->out_flags = out_flags;
if (out_flags) {
notify = PR_TRUE;
}
if (osfd > pq_max_osfd) {
pq_max_osfd = osfd;
}
}
if (notify == PR_TRUE) {
PRIntn pri;
PRThread *thred;
PR_REMOVE_LINK(&pq->links);
pq->on_ioq = PR_FALSE;
/*
* Decrement the count of descriptors for each desciptor/event
* because this I/O request is being removed from the
* ioq
*/
pds = pq->pds;
for (; pds < epds; pds++) {
PRInt32 osfd = pds->osfd;
PRInt16 in_flags = pds->in_flags;
PR_ASSERT(osfd >= 0 || in_flags == 0);
if (in_flags & _PR_UNIX_POLL_READ) {
if (--(_PR_FD_READ_CNT(me->cpu))[osfd] == 0)
FD_CLR(osfd, &_PR_FD_READ_SET(me->cpu));
}
if (in_flags & _PR_UNIX_POLL_WRITE) {
if (--(_PR_FD_WRITE_CNT(me->cpu))[osfd] == 0)
FD_CLR(osfd, &_PR_FD_WRITE_SET(me->cpu));
}
if (in_flags & _PR_UNIX_POLL_EXCEPT) {
if (--(_PR_FD_EXCEPTION_CNT(me->cpu))[osfd] == 0)
FD_CLR(osfd, &_PR_FD_EXCEPTION_SET(me->cpu));
}
}
/*
* Because this thread can run on a different cpu right
* after being added to the run queue, do not dereference
* pq
*/
thred = pq->thr;
_PR_THREAD_LOCK(thred);
if (pq->thr->flags & (_PR_ON_PAUSEQ|_PR_ON_SLEEPQ)) {
_PRCPU *cpu = thred->cpu;
_PR_SLEEPQ_LOCK(pq->thr->cpu);
_PR_DEL_SLEEPQ(pq->thr, PR_TRUE);
_PR_SLEEPQ_UNLOCK(pq->thr->cpu);
if (pq->thr->flags & _PR_SUSPENDING) {
/*
* set thread state to SUSPENDED;
* a Resume operation on the thread
* will move it to the runQ
*/
pq->thr->state = _PR_SUSPENDED;
_PR_MISCQ_LOCK(pq->thr->cpu);
_PR_ADD_SUSPENDQ(pq->thr, pq->thr->cpu);
_PR_MISCQ_UNLOCK(pq->thr->cpu);
} else {
pri = pq->thr->priority;
pq->thr->state = _PR_RUNNABLE;
pq->thr->cpu = cpu;
_PR_RUNQ_LOCK(cpu);
_PR_ADD_RUNQ(pq->thr, cpu, pri);
_PR_RUNQ_UNLOCK(cpu);
if (_pr_md_idle_cpus > 1)
_PR_MD_WAKEUP_WAITER(thred);
}
}
_PR_THREAD_UNLOCK(thred);
} else {
if (pq->timeout < _PR_IOQ_TIMEOUT(me->cpu))
_PR_IOQ_TIMEOUT(me->cpu) = pq->timeout;
if (_PR_IOQ_MAX_OSFD(me->cpu) < pq_max_osfd)
_PR_IOQ_MAX_OSFD(me->cpu) = pq_max_osfd;
}
}
if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
if ((FD_ISSET(_pr_md_pipefd[0], rp)) && (nfd == 1)) {
/*
* woken up by another thread; read all the data
* in the pipe to empty the pipe
*/
while ((rv =
read(_pr_md_pipefd[0], _pr_md_pipebuf, PIPE_BUF))
== PIPE_BUF){
}
PR_ASSERT((rv > 0) ||
((rv == -1) && (errno == EAGAIN)));
}
if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_md_pipefd[0])
_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
#ifdef IRIX
if ((me->cpu->id == 0) &&
(FD_ISSET(_pr_irix_primoridal_cpu_fd[0], rp))) {
if (_pr_irix_process_exit) {
/*
* process exit due to a call to PR_ProcessExit
*/
prctl(PR_SETEXITSIG, SIGKILL);
_exit(_pr_irix_process_exit_code);
} else {
while ((rv = read(_pr_irix_primoridal_cpu_fd[0],
_pr_md_pipebuf, PIPE_BUF)) == PIPE_BUF) {
}
PR_ASSERT(rv > 0);
}
}
if (me->cpu->id == 0) {
if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_irix_primoridal_cpu_fd[0])
_PR_IOQ_MAX_OSFD(me->cpu) = _pr_irix_primoridal_cpu_fd[0];
}
#endif
}
} else if (nfd < 0) {
if (errno == EBADF) {
FindBadFDs();
} else {
PR_LOG(_pr_io_lm, PR_LOG_MAX, ("select() failed with errno %d",
errno));
}
} else {
PR_ASSERT(nfd == 0);
/*
* compute the new value of _PR_IOQ_TIMEOUT
*/
q = _PR_IOQ(me->cpu).next;
_PR_IOQ_MAX_OSFD(me->cpu) = -1;
_PR_IOQ_TIMEOUT(me->cpu) = PR_INTERVAL_NO_TIMEOUT;
while (q != &_PR_IOQ(me->cpu)) {
PRPollQueue *pq = _PR_POLLQUEUE_PTR(q);
_PRUnixPollDesc *pds = pq->pds;
_PRUnixPollDesc *epds = pds + pq->npds;
PRInt32 pq_max_osfd = -1;
q = q->next;
for (; pds < epds; pds++) {
if (pds->osfd > pq_max_osfd) {
pq_max_osfd = pds->osfd;
}
}
if (pq->timeout < _PR_IOQ_TIMEOUT(me->cpu))
_PR_IOQ_TIMEOUT(me->cpu) = pq->timeout;
if (_PR_IOQ_MAX_OSFD(me->cpu) < pq_max_osfd)
_PR_IOQ_MAX_OSFD(me->cpu) = pq_max_osfd;
}
if (_PR_IS_NATIVE_THREAD_SUPPORTED()) {
if (_PR_IOQ_MAX_OSFD(me->cpu) < _pr_md_pipefd[0])
_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
}
}
#endif /* _PR_USE_POLL */
_PR_MD_IOQ_UNLOCK();
}
void _MD_Wakeup_CPUs()
{
PRInt32 rv, data;
data = 0;
rv = write(_pr_md_pipefd[1], &data, 1);
while ((rv < 0) && (errno == EAGAIN)) {
/*
* pipe full, read all data in pipe to empty it
*/
while ((rv =
read(_pr_md_pipefd[0], _pr_md_pipebuf, PIPE_BUF))
== PIPE_BUF) {
}
PR_ASSERT((rv > 0) ||
((rv == -1) && (errno == EAGAIN)));
rv = write(_pr_md_pipefd[1], &data, 1);
}
}
void _MD_InitCPUS()
{
PRInt32 rv, flags;
PRThread *me = _MD_CURRENT_THREAD();
rv = pipe(_pr_md_pipefd);
PR_ASSERT(rv == 0);
_PR_IOQ_MAX_OSFD(me->cpu) = _pr_md_pipefd[0];
#ifndef _PR_USE_POLL
FD_SET(_pr_md_pipefd[0], &_PR_FD_READ_SET(me->cpu));
#endif
flags = fcntl(_pr_md_pipefd[0], F_GETFL, 0);
fcntl(_pr_md_pipefd[0], F_SETFL, flags | O_NONBLOCK);
flags = fcntl(_pr_md_pipefd[1], F_GETFL, 0);
fcntl(_pr_md_pipefd[1], F_SETFL, flags | O_NONBLOCK);
}
/*
** Unix SIGALRM (clock) signal handler
*/
static void ClockInterruptHandler()
{
int olderrno;
PRUintn pri;
_PRCPU *cpu = _PR_MD_CURRENT_CPU();
PRThread *me = _MD_CURRENT_THREAD();
#ifdef SOLARIS
if (!me || _PR_IS_NATIVE_THREAD(me)) {
_pr_primordialCPU->u.missed[_pr_primordialCPU->where] |= _PR_MISSED_CLOCK;
return;
}
#endif
if (_PR_MD_GET_INTSOFF() != 0) {
cpu->u.missed[cpu->where] |= _PR_MISSED_CLOCK;
return;
}
_PR_MD_SET_INTSOFF(1);
olderrno = errno;
_PR_ClockInterrupt();
errno = olderrno;
/*
** If the interrupt wants a resched or if some other thread at
** the same priority needs the cpu, reschedule.
*/
pri = me->priority;
if ((cpu->u.missed[3] || (_PR_RUNQREADYMASK(me->cpu) >> pri))) {
#ifdef _PR_NO_PREEMPT
cpu->resched = PR_TRUE;
if (pr_interruptSwitchHook) {
(*pr_interruptSwitchHook)(pr_interruptSwitchHookArg);
}
#else /* _PR_NO_PREEMPT */
/*
** Re-enable unix interrupts (so that we can use
** setjmp/longjmp for context switching without having to
** worry about the signal state)
*/
sigprocmask(SIG_SETMASK, &empty_set, 0);
PR_LOG(_pr_sched_lm, PR_LOG_MIN, ("clock caused context switch"));
if(!(me->flags & _PR_IDLE_THREAD)) {
_PR_THREAD_LOCK(me);
me->state = _PR_RUNNABLE;
me->cpu = cpu;
_PR_RUNQ_LOCK(cpu);
_PR_ADD_RUNQ(me, cpu, pri);
_PR_RUNQ_UNLOCK(cpu);
_PR_THREAD_UNLOCK(me);
} else
me->state = _PR_RUNNABLE;
_MD_SWITCH_CONTEXT(me);
PR_LOG(_pr_sched_lm, PR_LOG_MIN, ("clock back from context switch"));
#endif /* _PR_NO_PREEMPT */
}
/*
* Because this thread could be running on a different cpu after
* a context switch the current cpu should be accessed and the
* value of the 'cpu' variable should not be used.
*/
_PR_MD_SET_INTSOFF(0);
}
/*
* On HP-UX 9, we have to use the sigvector() interface to restart
* interrupted system calls, because sigaction() does not have the
* SA_RESTART flag.
*/
#ifdef HPUX9
static void HPUX9_ClockInterruptHandler(
int sig,
int code,
struct sigcontext *scp)
{
ClockInterruptHandler();
scp->sc_syscall_action = SIG_RESTART;
}
#endif /* HPUX9 */
/* # of milliseconds per clock tick that we will use */
#define MSEC_PER_TICK 50
void _MD_StartInterrupts()
{
char *eval;
if ((eval = getenv("NSPR_NOCLOCK")) != NULL) {
if (atoi(eval) == 0)
_nspr_noclock = 0;
else
_nspr_noclock = 1;
}
#ifndef _PR_NO_CLOCK_TIMER
if (!_nspr_noclock) {
_MD_EnableClockInterrupts();
}
#endif
}
void _MD_StopInterrupts()
{
sigprocmask(SIG_BLOCK, &timer_set, 0);
}
void _MD_EnableClockInterrupts()
{
struct itimerval itval;
extern PRUintn _pr_numCPU;
#ifdef HPUX9
struct sigvec vec;
vec.sv_handler = (void (*)()) HPUX9_ClockInterruptHandler;
vec.sv_mask = 0;
vec.sv_flags = 0;
sigvector(SIGALRM, &vec, 0);
#else
struct sigaction vtact;
vtact.sa_handler = (void (*)()) ClockInterruptHandler;
sigemptyset(&vtact.sa_mask);
vtact.sa_flags = SA_RESTART;
sigaction(SIGALRM, &vtact, 0);
#endif /* HPUX9 */
PR_ASSERT(_pr_numCPU == 1);
itval.it_interval.tv_sec = 0;
itval.it_interval.tv_usec = MSEC_PER_TICK * PR_USEC_PER_MSEC;
itval.it_value = itval.it_interval;
setitimer(ITIMER_REAL, &itval, 0);
}
void _MD_DisableClockInterrupts()
{
struct itimerval itval;
extern PRUintn _pr_numCPU;
PR_ASSERT(_pr_numCPU == 1);
itval.it_interval.tv_sec = 0;
itval.it_interval.tv_usec = 0;
itval.it_value = itval.it_interval;
setitimer(ITIMER_REAL, &itval, 0);
}
void _MD_BlockClockInterrupts()
{
sigprocmask(SIG_BLOCK, &timer_set, 0);
}
void _MD_UnblockClockInterrupts()
{
sigprocmask(SIG_UNBLOCK, &timer_set, 0);
}
void _MD_MakeNonblock(PRFileDesc *fd)
{
PRInt32 osfd = fd->secret->md.osfd;
int flags;
if (osfd <= 2) {
/* Don't mess around with stdin, stdout or stderr */
return;
}
flags = fcntl(osfd, F_GETFL, 0);
/*
* Use O_NONBLOCK (POSIX-style non-blocking I/O) whenever possible.
* On SunOS 4, we must use FNDELAY (BSD-style non-blocking I/O),
* otherwise connect() still blocks and can be interrupted by SIGALRM.
*/
#ifdef SUNOS4
fcntl(osfd, F_SETFL, flags | FNDELAY);
#else
fcntl(osfd, F_SETFL, flags | O_NONBLOCK);
#endif
}
PRInt32 _MD_open(const char *name, PRIntn flags, PRIntn mode)
{
PRInt32 osflags;
PRInt32 rv, err;
if (flags & PR_RDWR) {
osflags = O_RDWR;
} else if (flags & PR_WRONLY) {
osflags = O_WRONLY;
} else {
osflags = O_RDONLY;
}
if (flags & PR_EXCL)
osflags |= O_EXCL;
if (flags & PR_APPEND)
osflags |= O_APPEND;
if (flags & PR_TRUNCATE)
osflags |= O_TRUNC;
if (flags & PR_SYNC) {
#if defined(O_SYNC)
osflags |= O_SYNC;
#elif defined(O_FSYNC)
osflags |= O_FSYNC;
#else
#error "Neither O_SYNC nor O_FSYNC is defined on this platform"
#endif
}
/*
** On creations we hold the 'create' lock in order to enforce
** the semantics of PR_Rename. (see the latter for more details)
*/
if (flags & PR_CREATE_FILE)
{
osflags |= O_CREAT;
if (NULL !=_pr_rename_lock)
PR_Lock(_pr_rename_lock);
}
rv = _md_iovector._open64(name, osflags, mode);
if (rv < 0) {
err = _MD_ERRNO();
_PR_MD_MAP_OPEN_ERROR(err);
}
if ((flags & PR_CREATE_FILE) && (NULL !=_pr_rename_lock))
PR_Unlock(_pr_rename_lock);
return rv;
}
PRIntervalTime intr_timeout_ticks;
#if defined(SOLARIS) || defined(IRIX)
static void sigsegvhandler() {
fprintf(stderr,"Received SIGSEGV\n");
fflush(stderr);
pause();
}
static void sigaborthandler() {
fprintf(stderr,"Received SIGABRT\n");
fflush(stderr);
pause();
}
static void sigbushandler() {
fprintf(stderr,"Received SIGBUS\n");
fflush(stderr);
pause();
}
#endif /* SOLARIS, IRIX */
#endif /* !defined(_PR_PTHREADS) */
void _MD_query_fd_inheritable(PRFileDesc *fd)
{
int flags;
PR_ASSERT(_PR_TRI_UNKNOWN == fd->secret->inheritable);
flags = fcntl(fd->secret->md.osfd, F_GETFD, 0);
PR_ASSERT(-1 != flags);
fd->secret->inheritable = (flags & FD_CLOEXEC) ?
_PR_TRI_FALSE : _PR_TRI_TRUE;
}
PROffset32 _MD_lseek(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence)
{
PROffset32 rv, where;
switch (whence) {
case PR_SEEK_SET:
where = SEEK_SET;
break;
case PR_SEEK_CUR:
where = SEEK_CUR;
break;
case PR_SEEK_END:
where = SEEK_END;
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
rv = -1;
goto done;
}
rv = lseek(fd->secret->md.osfd,offset,where);
if (rv == -1)
{
PRInt32 syserr = _MD_ERRNO();
_PR_MD_MAP_LSEEK_ERROR(syserr);
}
done:
return(rv);
}
PROffset64 _MD_lseek64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence)
{
PRInt32 where;
PROffset64 rv;
switch (whence)
{
case PR_SEEK_SET:
where = SEEK_SET;
break;
case PR_SEEK_CUR:
where = SEEK_CUR;
break;
case PR_SEEK_END:
where = SEEK_END;
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
rv = minus_one;
goto done;
}
rv = _md_iovector._lseek64(fd->secret->md.osfd, offset, where);
if (LL_EQ(rv, minus_one))
{
PRInt32 syserr = _MD_ERRNO();
_PR_MD_MAP_LSEEK_ERROR(syserr);
}
done:
return rv;
} /* _MD_lseek64 */
/*
** _MD_set_fileinfo_times --
** Set the modifyTime and creationTime of the PRFileInfo
** structure using the values in struct stat.
**
** _MD_set_fileinfo64_times --
** Set the modifyTime and creationTime of the PRFileInfo64
** structure using the values in _MDStat64.
*/
#if defined(_PR_STAT_HAS_ST_ATIM)
/*
** struct stat has st_atim, st_mtim, and st_ctim fields of
** type timestruc_t.
*/
static void _MD_set_fileinfo_times(
const struct stat *sb,
PRFileInfo *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtim.tv_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtim.tv_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctim.tv_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctim.tv_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
static void _MD_set_fileinfo64_times(
const _MDStat64 *sb,
PRFileInfo64 *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtim.tv_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtim.tv_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctim.tv_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctim.tv_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
#elif defined(_PR_STAT_HAS_ST_ATIM_UNION)
/*
** The st_atim, st_mtim, and st_ctim fields in struct stat are
** unions with a st__tim union member of type timestruc_t.
*/
static void _MD_set_fileinfo_times(
const struct stat *sb,
PRFileInfo *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtim.st__tim.tv_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtim.st__tim.tv_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctim.st__tim.tv_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctim.st__tim.tv_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
static void _MD_set_fileinfo64_times(
const _MDStat64 *sb,
PRFileInfo64 *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtim.st__tim.tv_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtim.st__tim.tv_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctim.st__tim.tv_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctim.st__tim.tv_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
#elif defined(_PR_STAT_HAS_ST_ATIMESPEC)
/*
** struct stat has st_atimespec, st_mtimespec, and st_ctimespec
** fields of type struct timespec.
*/
#if defined(_PR_TIMESPEC_HAS_TS_SEC)
static void _MD_set_fileinfo_times(
const struct stat *sb,
PRFileInfo *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtimespec.ts_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtimespec.ts_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctimespec.ts_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctimespec.ts_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
static void _MD_set_fileinfo64_times(
const _MDStat64 *sb,
PRFileInfo64 *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtimespec.ts_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtimespec.ts_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctimespec.ts_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctimespec.ts_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
#else /* _PR_TIMESPEC_HAS_TS_SEC */
/*
** The POSIX timespec structure has tv_sec and tv_nsec.
*/
static void _MD_set_fileinfo_times(
const struct stat *sb,
PRFileInfo *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtimespec.tv_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtimespec.tv_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctimespec.tv_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctimespec.tv_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
static void _MD_set_fileinfo64_times(
const _MDStat64 *sb,
PRFileInfo64 *info)
{
PRInt64 us, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(info->modifyTime, sb->st_mtimespec.tv_sec);
LL_MUL(info->modifyTime, info->modifyTime, s2us);
LL_I2L(us, sb->st_mtimespec.tv_nsec / 1000);
LL_ADD(info->modifyTime, info->modifyTime, us);
LL_I2L(info->creationTime, sb->st_ctimespec.tv_sec);
LL_MUL(info->creationTime, info->creationTime, s2us);
LL_I2L(us, sb->st_ctimespec.tv_nsec / 1000);
LL_ADD(info->creationTime, info->creationTime, us);
}
#endif /* _PR_TIMESPEC_HAS_TS_SEC */
#elif defined(_PR_STAT_HAS_ONLY_ST_ATIME)
/*
** struct stat only has st_atime, st_mtime, and st_ctime fields
** of type time_t.
*/
static void _MD_set_fileinfo_times(
const struct stat *sb,
PRFileInfo *info)
{
PRInt64 s, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(s, sb->st_mtime);
LL_MUL(s, s, s2us);
info->modifyTime = s;
LL_I2L(s, sb->st_ctime);
LL_MUL(s, s, s2us);
info->creationTime = s;
}
static void _MD_set_fileinfo64_times(
const _MDStat64 *sb,
PRFileInfo64 *info)
{
PRInt64 s, s2us;
LL_I2L(s2us, PR_USEC_PER_SEC);
LL_I2L(s, sb->st_mtime);
LL_MUL(s, s, s2us);
info->modifyTime = s;
LL_I2L(s, sb->st_ctime);
LL_MUL(s, s, s2us);
info->creationTime = s;
}
#else
#error "I don't know yet"
#endif
static int _MD_convert_stat_to_fileinfo(
const struct stat *sb,
PRFileInfo *info)
{
if (S_IFREG & sb->st_mode)
info->type = PR_FILE_FILE;
else if (S_IFDIR & sb->st_mode)
info->type = PR_FILE_DIRECTORY;
else
info->type = PR_FILE_OTHER;
#if defined(_PR_HAVE_LARGE_OFF_T)
if (0x7fffffffL < sb->st_size)
{
PR_SetError(PR_FILE_TOO_BIG_ERROR, 0);
return -1;
}
#endif /* defined(_PR_HAVE_LARGE_OFF_T) */
info->size = sb->st_size;
_MD_set_fileinfo_times(sb, info);
return 0;
} /* _MD_convert_stat_to_fileinfo */
static int _MD_convert_stat64_to_fileinfo64(
const _MDStat64 *sb,
PRFileInfo64 *info)
{
if (S_IFREG & sb->st_mode)
info->type = PR_FILE_FILE;
else if (S_IFDIR & sb->st_mode)
info->type = PR_FILE_DIRECTORY;
else
info->type = PR_FILE_OTHER;
LL_I2L(info->size, sb->st_size);
_MD_set_fileinfo64_times(sb, info);
return 0;
} /* _MD_convert_stat64_to_fileinfo64 */
PRInt32 _MD_getfileinfo(const char *fn, PRFileInfo *info)
{
PRInt32 rv;
struct stat sb;
rv = stat(fn, &sb);
if (rv < 0)
_PR_MD_MAP_STAT_ERROR(_MD_ERRNO());
else if (NULL != info)
rv = _MD_convert_stat_to_fileinfo(&sb, info);
return rv;
}
PRInt32 _MD_getfileinfo64(const char *fn, PRFileInfo64 *info)
{
_MDStat64 sb;
PRInt32 rv = _md_iovector._stat64(fn, &sb);
if (rv < 0)
_PR_MD_MAP_STAT_ERROR(_MD_ERRNO());
else if (NULL != info)
rv = _MD_convert_stat64_to_fileinfo64(&sb, info);
return rv;
}
PRInt32 _MD_getopenfileinfo(const PRFileDesc *fd, PRFileInfo *info)
{
struct stat sb;
PRInt32 rv = fstat(fd->secret->md.osfd, &sb);
if (rv < 0)
_PR_MD_MAP_FSTAT_ERROR(_MD_ERRNO());
else if (NULL != info)
rv = _MD_convert_stat_to_fileinfo(&sb, info);
return rv;
}
PRInt32 _MD_getopenfileinfo64(const PRFileDesc *fd, PRFileInfo64 *info)
{
_MDStat64 sb;
PRInt32 rv = _md_iovector._fstat64(fd->secret->md.osfd, &sb);
if (rv < 0)
_PR_MD_MAP_FSTAT_ERROR(_MD_ERRNO());
else if (NULL != info)
rv = _MD_convert_stat64_to_fileinfo64(&sb, info);
return rv;
}
/*
* _md_iovector._open64 must be initialized to 'open' so that _PR_InitLog can
* open the log file during NSPR initialization, before _md_iovector is
* initialized by _PR_MD_FINAL_INIT. This means the log file cannot be a
* large file on some platforms.
*/
#ifdef SYMBIAN
struct _MD_IOVector _md_iovector; /* Will crash if NSPR_LOG_FILE is set. */
#else
struct _MD_IOVector _md_iovector = { open };
#endif
/*
** These implementations are to emulate large file routines on systems that
** don't have them. Their goal is to check in case overflow occurs. Otherwise
** they will just operate as normal using 32-bit file routines.
**
** The checking might be pre- or post-op, depending on the semantics.
*/
#if defined(SOLARIS2_5)
static PRIntn _MD_solaris25_fstat64(PRIntn osfd, _MDStat64 *buf)
{
PRInt32 rv;
struct stat sb;
rv = fstat(osfd, &sb);
if (rv >= 0)
{
/*
** I'm only copying the fields that are immediately needed.
** If somebody else calls this function, some of the fields
** may not be defined.
*/
(void)memset(buf, 0, sizeof(_MDStat64));
buf->st_mode = sb.st_mode;
buf->st_ctim = sb.st_ctim;
buf->st_mtim = sb.st_mtim;
buf->st_size = sb.st_size;
}
return rv;
} /* _MD_solaris25_fstat64 */
static PRIntn _MD_solaris25_stat64(const char *fn, _MDStat64 *buf)
{
PRInt32 rv;
struct stat sb;
rv = stat(fn, &sb);
if (rv >= 0)
{
/*
** I'm only copying the fields that are immediately needed.
** If somebody else calls this function, some of the fields
** may not be defined.
*/
(void)memset(buf, 0, sizeof(_MDStat64));
buf->st_mode = sb.st_mode;
buf->st_ctim = sb.st_ctim;
buf->st_mtim = sb.st_mtim;
buf->st_size = sb.st_size;
}
return rv;
} /* _MD_solaris25_stat64 */
#endif /* defined(SOLARIS2_5) */
#if defined(_PR_NO_LARGE_FILES) || defined(SOLARIS2_5)
static PROffset64 _MD_Unix_lseek64(PRIntn osfd, PROffset64 offset, PRIntn whence)
{
PRUint64 maxoff;
PROffset64 rv = minus_one;
LL_I2L(maxoff, 0x7fffffff);
if (LL_CMP(offset, <=, maxoff))
{
off_t off;
LL_L2I(off, offset);
LL_I2L(rv, lseek(osfd, off, whence));
}
else errno = EFBIG; /* we can't go there */
return rv;
} /* _MD_Unix_lseek64 */
static void* _MD_Unix_mmap64(
void *addr, PRSize len, PRIntn prot, PRIntn flags,
PRIntn fildes, PRInt64 offset)
{
PR_SetError(PR_FILE_TOO_BIG_ERROR, 0);
return NULL;
} /* _MD_Unix_mmap64 */
#endif /* defined(_PR_NO_LARGE_FILES) || defined(SOLARIS2_5) */
#if defined(OSF1) && defined(__GNUC__)
/*
* On OSF1 V5.0A, <sys/stat.h> defines stat and fstat as
* macros when compiled under gcc, so it is rather tricky to
* take the addresses of the real functions the macros expend
* to. A simple solution is to define forwarder functions
* and take the addresses of the forwarder functions instead.
*/
static int stat_forwarder(const char *path, struct stat *buffer)
{
return stat(path, buffer);
}
static int fstat_forwarder(int filedes, struct stat *buffer)
{
return fstat(filedes, buffer);
}
#endif
static void _PR_InitIOV(void)
{
#if defined(SOLARIS2_5)
PRLibrary *lib;
void *open64_func;
open64_func = PR_FindSymbolAndLibrary("open64", &lib);
if (NULL != open64_func)
{
PR_ASSERT(NULL != lib);
_md_iovector._open64 = (_MD_Open64)open64_func;
_md_iovector._mmap64 = (_MD_Mmap64)PR_FindSymbol(lib, "mmap64");
_md_iovector._fstat64 = (_MD_Fstat64)PR_FindSymbol(lib, "fstat64");
_md_iovector._stat64 = (_MD_Stat64)PR_FindSymbol(lib, "stat64");
_md_iovector._lseek64 = (_MD_Lseek64)PR_FindSymbol(lib, "lseek64");
(void)PR_UnloadLibrary(lib);
}
else
{
_md_iovector._open64 = open;
_md_iovector._mmap64 = _MD_Unix_mmap64;
_md_iovector._fstat64 = _MD_solaris25_fstat64;
_md_iovector._stat64 = _MD_solaris25_stat64;
_md_iovector._lseek64 = _MD_Unix_lseek64;
}
#elif defined(_PR_NO_LARGE_FILES)
_md_iovector._open64 = open;
_md_iovector._mmap64 = _MD_Unix_mmap64;
_md_iovector._fstat64 = fstat;
_md_iovector._stat64 = stat;
_md_iovector._lseek64 = _MD_Unix_lseek64;
#elif defined(_PR_HAVE_OFF64_T)
#if defined(IRIX5_3)
_md_iovector._open64 = open;
#else
_md_iovector._open64 = open64;
#endif
_md_iovector._mmap64 = mmap64;
_md_iovector._fstat64 = fstat64;
_md_iovector._stat64 = stat64;
_md_iovector._lseek64 = lseek64;
#elif defined(_PR_HAVE_LARGE_OFF_T)
_md_iovector._open64 = open;
_md_iovector._mmap64 = mmap;
#if defined(OSF1) && defined(__GNUC__)
_md_iovector._fstat64 = fstat_forwarder;
_md_iovector._stat64 = stat_forwarder;
#else
_md_iovector._fstat64 = fstat;
_md_iovector._stat64 = stat;
#endif
_md_iovector._lseek64 = lseek;
#else
#error "I don't know yet"
#endif
LL_I2L(minus_one, -1);
} /* _PR_InitIOV */
void _PR_UnixInit(void)
{
struct sigaction sigact;
int rv;
sigemptyset(&timer_set);
#if !defined(_PR_PTHREADS)
sigaddset(&timer_set, SIGALRM);
sigemptyset(&empty_set);
intr_timeout_ticks =
PR_SecondsToInterval(_PR_INTERRUPT_CHECK_INTERVAL_SECS);
#if defined(SOLARIS) || defined(IRIX)
if (getenv("NSPR_SIGSEGV_HANDLE")) {
sigact.sa_handler = sigsegvhandler;
sigact.sa_flags = 0;
sigact.sa_mask = timer_set;
sigaction(SIGSEGV, &sigact, 0);
}
if (getenv("NSPR_SIGABRT_HANDLE")) {
sigact.sa_handler = sigaborthandler;
sigact.sa_flags = 0;
sigact.sa_mask = timer_set;
sigaction(SIGABRT, &sigact, 0);
}
if (getenv("NSPR_SIGBUS_HANDLE")) {
sigact.sa_handler = sigbushandler;
sigact.sa_flags = 0;
sigact.sa_mask = timer_set;
sigaction(SIGBUS, &sigact, 0);
}
#endif
#endif /* !defined(_PR_PTHREADS) */
/*
* Under HP-UX DCE threads, sigaction() installs a per-thread
* handler, so we use sigvector() to install a process-wide
* handler.
*/
#if defined(HPUX) && defined(_PR_DCETHREADS)
{
struct sigvec vec;
vec.sv_handler = SIG_IGN;
vec.sv_mask = 0;
vec.sv_flags = 0;
rv = sigvector(SIGPIPE, &vec, NULL);
PR_ASSERT(0 == rv);
}
#else
sigact.sa_handler = SIG_IGN;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
rv = sigaction(SIGPIPE, &sigact, 0);
PR_ASSERT(0 == rv);
#endif /* HPUX && _PR_DCETHREADS */
_pr_rename_lock = PR_NewLock();
PR_ASSERT(NULL != _pr_rename_lock);
_pr_Xfe_mon = PR_NewMonitor();
PR_ASSERT(NULL != _pr_Xfe_mon);
_PR_InitIOV(); /* one last hack */
}
void _PR_UnixCleanup(void)
{
if (_pr_rename_lock) {
PR_DestroyLock(_pr_rename_lock);
_pr_rename_lock = NULL;
}
if (_pr_Xfe_mon) {
PR_DestroyMonitor(_pr_Xfe_mon);
_pr_Xfe_mon = NULL;
}
}
#if !defined(_PR_PTHREADS)
/*
* Variables used by the GC code, initialized in _MD_InitSegs().
*/
static PRInt32 _pr_zero_fd = -1;
static PRLock *_pr_md_lock = NULL;
/*
* _MD_InitSegs --
*
* This is Unix's version of _PR_MD_INIT_SEGS(), which is
* called by _PR_InitSegs(), which in turn is called by
* PR_Init().
*/
void _MD_InitSegs(void)
{
#ifdef DEBUG
/*
** Disable using mmap(2) if NSPR_NO_MMAP is set
*/
if (getenv("NSPR_NO_MMAP")) {
_pr_zero_fd = -2;
return;
}
#endif
_pr_zero_fd = open("/dev/zero",O_RDWR , 0);
/* Prevent the fd from being inherited by child processes */
fcntl(_pr_zero_fd, F_SETFD, FD_CLOEXEC);
_pr_md_lock = PR_NewLock();
}
PRStatus _MD_AllocSegment(PRSegment *seg, PRUint32 size, void *vaddr)
{
static char *lastaddr = (char*) _PR_STACK_VMBASE;
PRStatus retval = PR_SUCCESS;
int prot;
void *rv;
PR_ASSERT(seg != 0);
PR_ASSERT(size != 0);
PR_Lock(_pr_md_lock);
if (_pr_zero_fd < 0) {
from_heap:
seg->vaddr = PR_MALLOC(size);
if (!seg->vaddr) {
retval = PR_FAILURE;
}
else {
seg->size = size;
}
goto exit;
}
prot = PROT_READ|PROT_WRITE;
/*
* On Alpha Linux, the user-level thread stack needs
* to be made executable because longjmp/signal seem
* to put machine instructions on the stack.
*/
#if defined(LINUX) && defined(__alpha)
prot |= PROT_EXEC;
#endif
rv = mmap((vaddr != 0) ? vaddr : lastaddr, size, prot,
_MD_MMAP_FLAGS,
_pr_zero_fd, 0);
if (rv == (void*)-1) {
goto from_heap;
}
lastaddr += size;
seg->vaddr = rv;
seg->size = size;
seg->flags = _PR_SEG_VM;
exit:
PR_Unlock(_pr_md_lock);
return retval;
}
void _MD_FreeSegment(PRSegment *seg)
{
if (seg->flags & _PR_SEG_VM)
(void) munmap(seg->vaddr, seg->size);