nspr-4.8.6/mozilla/nsprpub/pr/include/md/_pth.h - nest-learning-thermostat/5.1.5/nspr - Git at Google

 /* -*- 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 ***** */

 #ifndef nspr_pth_defs_h_
 #define nspr_pth_defs_h_

 /*
 ** Appropriate definitions of entry points not used in a pthreads world
 */
 #define _PR_MD_BLOCK_CLOCK_INTERRUPTS()
 #define _PR_MD_UNBLOCK_CLOCK_INTERRUPTS()
 #define _PR_MD_DISABLE_CLOCK_INTERRUPTS()
 #define _PR_MD_ENABLE_CLOCK_INTERRUPTS()

 /* In good standards fashion, the DCE threads (based on posix-4) are not
  * quite the same as newer posix implementations.  These are mostly name
  * changes and small differences, so macros usually do the trick
  */
 #ifdef _PR_DCETHREADS
 #define _PT_PTHREAD_MUTEXATTR_INIT        pthread_mutexattr_create
 #define _PT_PTHREAD_MUTEXATTR_DESTROY     pthread_mutexattr_delete
 #define _PT_PTHREAD_MUTEX_INIT(m, a)      pthread_mutex_init(&(m), a)
 #define _PT_PTHREAD_MUTEX_IS_LOCKED(m)    (0 == pthread_mutex_trylock(&(m)))
 #define _PT_PTHREAD_CONDATTR_INIT         pthread_condattr_create
 #define _PT_PTHREAD_COND_INIT(m, a)       pthread_cond_init(&(m), a)
 #define _PT_PTHREAD_CONDATTR_DESTROY      pthread_condattr_delete

 /* Notes about differences between DCE threads and pthreads 10:
  *   1. pthread_mutex_trylock returns 1 when it locks the mutex
  *      0 when it does not.  The latest pthreads has a set of errno-like
  *      return values.
  *   2. return values from pthread_cond_timedwait are different.
  *
  *
  *
  */
 #elif defined(BSDI)
 /*
  * Mutex and condition attributes are not supported.  The attr
  * argument to pthread_mutex_init() and pthread_cond_init() must
  * be passed as NULL.
  *
  * The memset calls in _PT_PTHREAD_MUTEX_INIT and _PT_PTHREAD_COND_INIT
  * are to work around BSDI's using a single bit to indicate a mutex
  * or condition variable is initialized.  This entire BSDI section
  * will go away when BSDI releases updated threads libraries for
  * BSD/OS 3.1 and 4.0.
  */
 #define _PT_PTHREAD_MUTEXATTR_INIT(x)     0
 #define _PT_PTHREAD_MUTEXATTR_DESTROY(x)  /* */
 #define _PT_PTHREAD_MUTEX_INIT(m, a)      (memset(&(m), 0, sizeof(m)), \
                                       pthread_mutex_init(&(m), NULL))
 #define _PT_PTHREAD_MUTEX_IS_LOCKED(m)    (EBUSY == pthread_mutex_trylock(&(m)))
 #define _PT_PTHREAD_CONDATTR_INIT(x)      0
 #define _PT_PTHREAD_CONDATTR_DESTROY(x)   /* */
 #define _PT_PTHREAD_COND_INIT(m, a)       (memset(&(m), 0, sizeof(m)), \
                                       pthread_cond_init(&(m), NULL))
 #else
 #define _PT_PTHREAD_MUTEXATTR_INIT        pthread_mutexattr_init
 #define _PT_PTHREAD_MUTEXATTR_DESTROY     pthread_mutexattr_destroy
 #define _PT_PTHREAD_MUTEX_INIT(m, a)      pthread_mutex_init(&(m), &(a))
 #if defined(FREEBSD)
 #define _PT_PTHREAD_MUTEX_IS_LOCKED(m)    pt_pthread_mutex_is_locked(&(m))
 #else
 #define _PT_PTHREAD_MUTEX_IS_LOCKED(m)    (EBUSY == pthread_mutex_trylock(&(m)))
 #endif
 #if defined(ANDROID)
 /* Conditional attribute init and destroy aren't implemented in bionic. */
 #define _PT_PTHREAD_CONDATTR_INIT(x)      0
 #define _PT_PTHREAD_CONDATTR_DESTROY(x)   /* */
 #else
 #define _PT_PTHREAD_CONDATTR_INIT         pthread_condattr_init
 #define _PT_PTHREAD_CONDATTR_DESTROY      pthread_condattr_destroy
 #endif
 #define _PT_PTHREAD_COND_INIT(m, a)       pthread_cond_init(&(m), &(a))
 #endif

 /* The pthreads standard does not specify an invalid value for the
  * pthread_t handle.  (0 is usually an invalid pthread identifier
  * but there are exceptions, for example, DG/UX.)  These macros
  * define a way to set the handle to or compare the handle with an
  * invalid identifier.  These macros are not portable and may be
  * more of a problem as we adapt to more pthreads implementations.
  * They are only used in the PRMonitor functions.  Do not use them
  * in new code.
  *
  * Unfortunately some of our clients depend on certain properties
  * of our PRMonitor implementation, preventing us from replacing
  * it by a portable implementation.
  * - High-performance servers like the fact that PR_EnterMonitor
  *   only calls PR_Lock and PR_ExitMonitor only calls PR_Unlock.
  *   (A portable implementation would use a PRLock and a PRCondVar
  *   to implement the recursive lock in a monitor and call both
  *   PR_Lock and PR_Unlock in PR_EnterMonitor and PR_ExitMonitor.)
  *   Unfortunately this forces us to read the monitor owner field
  *   without holding a lock.
  * - One way to make it safe to read the monitor owner field
  *   without holding a lock is to make that field a PRThread*
  *   (one should be able to read a pointer with a single machine
  *   instruction).  However, PR_GetCurrentThread calls calloc if
  *   it is called by a thread that was not created by NSPR.  The
  *   malloc tracing tools in the Mozilla client use PRMonitor for
  *   locking in their malloc, calloc, and free functions.  If
  *   PR_EnterMonitor calls any of these functions, infinite
  *   recursion ensues.
  */
 #if defined(_PR_DCETHREADS)
 #define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) \
 	memset(&(t), 0, sizeof(pthread_t))
 #define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) \
 	(!memcmp(&(t), &pt_zero_tid, sizeof(pthread_t)))
 #define _PT_PTHREAD_COPY_THR_HANDLE(st, dt)   (dt) = (st)
 #elif defined(IRIX) || defined(OSF1) || defined(AIX) || defined(SOLARIS) \
 	|| defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
 	|| defined(HPUX) || defined(FREEBSD) \
 	|| defined(NETBSD) || defined(OPENBSD) || defined(BSDI) \
 	|| defined(NTO) || defined(DARWIN) \
 	|| defined(UNIXWARE) || defined(RISCOS)	|| defined(SYMBIAN)
 #ifdef __GNU__
 /* Hurd pthreads don't have an invalid value for pthread_t. -- rmh */
 #error Using Hurd pthreads
 #endif
 #define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t)  (t) = 0
 #define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t)  (t) == 0
 #define _PT_PTHREAD_COPY_THR_HANDLE(st, dt)   (dt) = (st)
 #else
 #error "pthreads is not supported for this architecture"
 #endif

 #if defined(_PR_DCETHREADS)
 #define _PT_PTHREAD_ATTR_INIT            pthread_attr_create
 #define _PT_PTHREAD_ATTR_DESTROY         pthread_attr_delete
 #define _PT_PTHREAD_CREATE(t, a, f, r)   pthread_create(t, a, f, r)
 #define _PT_PTHREAD_KEY_CREATE           pthread_keycreate
 #define _PT_PTHREAD_ATTR_SETSCHEDPOLICY  pthread_attr_setsched
 #define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) \
                                      (*(s) = pthread_attr_getstacksize(*(a)), 0)
 #define _PT_PTHREAD_GETSPECIFIC(k, r) \
 		pthread_getspecific((k), (pthread_addr_t *) &(r))
 #elif defined(_PR_PTHREADS)
 #define _PT_PTHREAD_ATTR_INIT            pthread_attr_init
 #define _PT_PTHREAD_ATTR_DESTROY         pthread_attr_destroy
 #define _PT_PTHREAD_CREATE(t, a, f, r)   pthread_create(t, &a, f, r)
 #define _PT_PTHREAD_KEY_CREATE           pthread_key_create
 #define _PT_PTHREAD_ATTR_SETSCHEDPOLICY  pthread_attr_setschedpolicy
 #define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) pthread_attr_getstacksize(a, s)
 #define _PT_PTHREAD_GETSPECIFIC(k, r)    (r) = pthread_getspecific(k)
 #else
 #error "Cannot determine pthread strategy"
 #endif

 #if defined(_PR_DCETHREADS)
 #define _PT_PTHREAD_EXPLICIT_SCHED      _PT_PTHREAD_DEFAULT_SCHED
 #endif

 /*
  * pthread_mutex_trylock returns different values in DCE threads and
  * pthreads.
  */
 #if defined(_PR_DCETHREADS)
 #define PT_TRYLOCK_SUCCESS 1
 #define PT_TRYLOCK_BUSY    0
 #else
 #define PT_TRYLOCK_SUCCESS 0
 #define PT_TRYLOCK_BUSY    EBUSY
 #endif

 /*
  * These platforms don't have sigtimedwait()
  */
 #if (defined(AIX) && !defined(AIX4_3_PLUS)) \
 	|| defined(LINUX) || defined(__GNU__)|| defined(__GLIBC__) \
 	|| defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
 	|| defined(BSDI) || defined(UNIXWARE) \
 	|| defined(DARWIN) || defined(SYMBIAN)
 #define PT_NO_SIGTIMEDWAIT
 #endif

 #if defined(OSF1)
 #define PT_PRIO_MIN            PRI_OTHER_MIN
 #define PT_PRIO_MAX            PRI_OTHER_MAX
 #elif defined(IRIX)
 #include <sys/sched.h>
 #define PT_PRIO_MIN            PX_PRIO_MIN
 #define PT_PRIO_MAX            PX_PRIO_MAX
 #elif defined(AIX)
 #include <sys/priv.h>
 #include <sys/sched.h>
 #ifndef PTHREAD_CREATE_JOINABLE
 #define PTHREAD_CREATE_JOINABLE     PTHREAD_CREATE_UNDETACHED
 #endif
 #define PT_PRIO_MIN            DEFAULT_PRIO
 #define PT_PRIO_MAX            DEFAULT_PRIO
 #elif defined(HPUX)

 #if defined(_PR_DCETHREADS)
 #define PT_PRIO_MIN            PRI_OTHER_MIN
 #define PT_PRIO_MAX            PRI_OTHER_MAX
 #else /* defined(_PR_DCETHREADS) */
 #include <sys/sched.h>
 #define PT_PRIO_MIN            sched_get_priority_min(SCHED_OTHER)
 #define PT_PRIO_MAX            sched_get_priority_max(SCHED_OTHER)
 #endif /* defined(_PR_DCETHREADS) */

 #elif defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
 	|| defined(FREEBSD) || defined(SYMBIAN)
 #define PT_PRIO_MIN            sched_get_priority_min(SCHED_OTHER)
 #define PT_PRIO_MAX            sched_get_priority_max(SCHED_OTHER)
 #elif defined(NTO)
 /*
  * Neutrino has functions that return the priority range but
  * they return invalid numbers, so I just hard coded these here
  * for now.  Jerry.Kirk@Nexarecorp.com
  */
 #define PT_PRIO_MIN            0
 #define PT_PRIO_MAX            30
 #elif defined(SOLARIS)
 /*
  * Solaris doesn't seem to have macros for the min/max priorities.
  * The range of 0-127 is mentioned in the pthread_setschedparam(3T)
  * man pages, and pthread_setschedparam indeed allows 0-127.  However,
  * pthread_attr_setschedparam does not allow 0; it allows 1-127.
  */
 #define PT_PRIO_MIN            1
 #define PT_PRIO_MAX            127
 #elif defined(OPENBSD)
 #define PT_PRIO_MIN            0
 #define PT_PRIO_MAX            31
 #elif defined(NETBSD) \
 	|| defined(BSDI) || defined(DARWIN) || defined(UNIXWARE) \
 	|| defined(RISCOS) /* XXX */
 #define PT_PRIO_MIN            0
 #define PT_PRIO_MAX            126
 #else
 #error "pthreads is not supported for this architecture"
 #endif

 /*
  * The _PT_PTHREAD_YIELD function is called from a signal handler.
  * Needed for garbage collection -- Look at PR_Suspend/PR_Resume
  * implementation.
  */
 #if defined(_PR_DCETHREADS)
 #define _PT_PTHREAD_YIELD()            	pthread_yield()
 #elif defined(OSF1)
 /*
  * sched_yield can't be called from a signal handler.  Must use
  * the _np version.
  */
 #define _PT_PTHREAD_YIELD()            	pthread_yield_np()
 #elif defined(AIX)
 extern int (*_PT_aix_yield_fcn)();
 #define _PT_PTHREAD_YIELD()			(*_PT_aix_yield_fcn)()
 #elif defined(IRIX)
 #include <time.h>
 #define _PT_PTHREAD_YIELD() \
     PR_BEGIN_MACRO               				\
 		struct timespec onemillisec = {0};		\
 		onemillisec.tv_nsec = 1000000L;			\
         nanosleep(&onemillisec,NULL);			\
     PR_END_MACRO
 #elif defined(HPUX) || defined(SOLARIS) \
 	|| defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
 	|| defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
 	|| defined(BSDI) || defined(NTO) || defined(DARWIN) \
 	|| defined(UNIXWARE) || defined(RISCOS) || defined(SYMBIAN)
 #define _PT_PTHREAD_YIELD()            	sched_yield()
 #else
 #error "Need to define _PT_PTHREAD_YIELD for this platform"
 #endif

 #endif /* nspr_pth_defs_h_ */
	/* -- 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 *** */

	#ifndef nspr_pth_defs_h_
	#define nspr_pth_defs_h_

	/*
	** Appropriate definitions of entry points not used in a pthreads world
	*/
	#define _PR_MD_BLOCK_CLOCK_INTERRUPTS()
	#define _PR_MD_UNBLOCK_CLOCK_INTERRUPTS()
	#define _PR_MD_DISABLE_CLOCK_INTERRUPTS()
	#define _PR_MD_ENABLE_CLOCK_INTERRUPTS()

	/* In good standards fashion, the DCE threads (based on posix-4) are not
	* quite the same as newer posix implementations. These are mostly name
	* changes and small differences, so macros usually do the trick
	*/
	#ifdef _PR_DCETHREADS
	#define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_create
	#define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_delete
	#define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), a)
	#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (0 == pthread_mutex_trylock(&(m)))
	#define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_create
	#define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), a)
	#define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_delete

	/* Notes about differences between DCE threads and pthreads 10:
	* 1. pthread_mutex_trylock returns 1 when it locks the mutex
	* 0 when it does not. The latest pthreads has a set of errno-like
	* return values.
	* 2. return values from pthread_cond_timedwait are different.
	*
	*
	*
	*/
	#elif defined(BSDI)
	/*
	* Mutex and condition attributes are not supported. The attr
	* argument to pthread_mutex_init() and pthread_cond_init() must
	* be passed as NULL.
	*
	* The memset calls in _PT_PTHREAD_MUTEX_INIT and _PT_PTHREAD_COND_INIT
	* are to work around BSDI's using a single bit to indicate a mutex
	* or condition variable is initialized. This entire BSDI section
	* will go away when BSDI releases updated threads libraries for
	* BSD/OS 3.1 and 4.0.
	*/
	#define _PT_PTHREAD_MUTEXATTR_INIT(x) 0
	#define _PT_PTHREAD_MUTEXATTR_DESTROY(x) /* */
	#define _PT_PTHREAD_MUTEX_INIT(m, a) (memset(&(m), 0, sizeof(m)), \
	pthread_mutex_init(&(m), NULL))
	#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m)))
	#define _PT_PTHREAD_CONDATTR_INIT(x) 0
	#define _PT_PTHREAD_CONDATTR_DESTROY(x) /* */
	#define _PT_PTHREAD_COND_INIT(m, a) (memset(&(m), 0, sizeof(m)), \
	pthread_cond_init(&(m), NULL))
	#else
	#define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_init
	#define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_destroy
	#define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), &(a))
	#if defined(FREEBSD)
	#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) pt_pthread_mutex_is_locked(&(m))
	#else
	#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m)))
	#endif
	#if defined(ANDROID)
	/* Conditional attribute init and destroy aren't implemented in bionic. */
	#define _PT_PTHREAD_CONDATTR_INIT(x) 0
	#define _PT_PTHREAD_CONDATTR_DESTROY(x) /* */
	#else
	#define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_init
	#define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_destroy
	#endif
	#define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), &(a))
	#endif

	/* The pthreads standard does not specify an invalid value for the
	* pthread_t handle. (0 is usually an invalid pthread identifier
	* but there are exceptions, for example, DG/UX.) These macros
	* define a way to set the handle to or compare the handle with an
	* invalid identifier. These macros are not portable and may be
	* more of a problem as we adapt to more pthreads implementations.
	* They are only used in the PRMonitor functions. Do not use them
	* in new code.
	*
	* Unfortunately some of our clients depend on certain properties
	* of our PRMonitor implementation, preventing us from replacing
	* it by a portable implementation.
	* - High-performance servers like the fact that PR_EnterMonitor
	* only calls PR_Lock and PR_ExitMonitor only calls PR_Unlock.
	* (A portable implementation would use a PRLock and a PRCondVar
	* to implement the recursive lock in a monitor and call both
	* PR_Lock and PR_Unlock in PR_EnterMonitor and PR_ExitMonitor.)
	* Unfortunately this forces us to read the monitor owner field
	* without holding a lock.
	* - One way to make it safe to read the monitor owner field
	* without holding a lock is to make that field a PRThread*
	* (one should be able to read a pointer with a single machine
	* instruction). However, PR_GetCurrentThread calls calloc if
	* it is called by a thread that was not created by NSPR. The
	* malloc tracing tools in the Mozilla client use PRMonitor for
	* locking in their malloc, calloc, and free functions. If
	* PR_EnterMonitor calls any of these functions, infinite
	* recursion ensues.
	*/
	#if defined(_PR_DCETHREADS)
	#define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) \
	memset(&(t), 0, sizeof(pthread_t))
	#define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) \
	(!memcmp(&(t), &pt_zero_tid, sizeof(pthread_t)))
	#define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st)
	#elif defined(IRIX) \|\| defined(OSF1) \|\| defined(AIX) \|\| defined(SOLARIS) \
	\|\| defined(LINUX) \|\| defined(__GNU__) \|\| defined(__GLIBC__) \
	\|\| defined(HPUX) \|\| defined(FREEBSD) \
	\|\| defined(NETBSD) \|\| defined(OPENBSD) \|\| defined(BSDI) \
	\|\| defined(NTO) \|\| defined(DARWIN) \
	\|\| defined(UNIXWARE) \|\| defined(RISCOS) \|\| defined(SYMBIAN)
	#ifdef __GNU__
	/* Hurd pthreads don't have an invalid value for pthread_t. -- rmh */
	#error Using Hurd pthreads
	#endif
	#define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) (t) = 0
	#define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) (t) == 0
	#define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st)
	#else
	#error "pthreads is not supported for this architecture"
	#endif

	#if defined(_PR_DCETHREADS)
	#define _PT_PTHREAD_ATTR_INIT pthread_attr_create
	#define _PT_PTHREAD_ATTR_DESTROY pthread_attr_delete
	#define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, a, f, r)
	#define _PT_PTHREAD_KEY_CREATE pthread_keycreate
	#define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setsched
	#define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) \
	((s) = pthread_attr_getstacksize((a)), 0)
	#define _PT_PTHREAD_GETSPECIFIC(k, r) \
	pthread_getspecific((k), (pthread_addr_t *) &(r))
	#elif defined(_PR_PTHREADS)
	#define _PT_PTHREAD_ATTR_INIT pthread_attr_init
	#define _PT_PTHREAD_ATTR_DESTROY pthread_attr_destroy
	#define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, &a, f, r)
	#define _PT_PTHREAD_KEY_CREATE pthread_key_create
	#define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setschedpolicy
	#define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) pthread_attr_getstacksize(a, s)
	#define _PT_PTHREAD_GETSPECIFIC(k, r) (r) = pthread_getspecific(k)
	#else
	#error "Cannot determine pthread strategy"
	#endif

	#if defined(_PR_DCETHREADS)
	#define _PT_PTHREAD_EXPLICIT_SCHED _PT_PTHREAD_DEFAULT_SCHED
	#endif

	/*
	* pthread_mutex_trylock returns different values in DCE threads and
	* pthreads.
	*/
	#if defined(_PR_DCETHREADS)
	#define PT_TRYLOCK_SUCCESS 1
	#define PT_TRYLOCK_BUSY 0
	#else
	#define PT_TRYLOCK_SUCCESS 0
	#define PT_TRYLOCK_BUSY EBUSY
	#endif

	/*
	* These platforms don't have sigtimedwait()
	*/
	#if (defined(AIX) && !defined(AIX4_3_PLUS)) \
	\|\| defined(LINUX) \|\| defined(__GNU__)\|\| defined(__GLIBC__) \
	\|\| defined(FREEBSD) \|\| defined(NETBSD) \|\| defined(OPENBSD) \
	\|\| defined(BSDI) \|\| defined(UNIXWARE) \
	\|\| defined(DARWIN) \|\| defined(SYMBIAN)
	#define PT_NO_SIGTIMEDWAIT
	#endif

	#if defined(OSF1)
	#define PT_PRIO_MIN PRI_OTHER_MIN
	#define PT_PRIO_MAX PRI_OTHER_MAX
	#elif defined(IRIX)
	#include <sys/sched.h>
	#define PT_PRIO_MIN PX_PRIO_MIN
	#define PT_PRIO_MAX PX_PRIO_MAX
	#elif defined(AIX)
	#include <sys/priv.h>
	#include <sys/sched.h>
	#ifndef PTHREAD_CREATE_JOINABLE
	#define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED
	#endif
	#define PT_PRIO_MIN DEFAULT_PRIO
	#define PT_PRIO_MAX DEFAULT_PRIO
	#elif defined(HPUX)

	#if defined(_PR_DCETHREADS)
	#define PT_PRIO_MIN PRI_OTHER_MIN
	#define PT_PRIO_MAX PRI_OTHER_MAX
	#else /* defined(_PR_DCETHREADS) */
	#include <sys/sched.h>
	#define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
	#define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
	#endif /* defined(_PR_DCETHREADS) */

	#elif defined(LINUX) \|\| defined(__GNU__) \|\| defined(__GLIBC__) \
	\|\| defined(FREEBSD) \|\| defined(SYMBIAN)
	#define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
	#define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
	#elif defined(NTO)
	/*
	* Neutrino has functions that return the priority range but
	* they return invalid numbers, so I just hard coded these here
	* for now. Jerry.Kirk@Nexarecorp.com
	*/
	#define PT_PRIO_MIN 0
	#define PT_PRIO_MAX 30
	#elif defined(SOLARIS)
	/*
	* Solaris doesn't seem to have macros for the min/max priorities.
	* The range of 0-127 is mentioned in the pthread_setschedparam(3T)
	* man pages, and pthread_setschedparam indeed allows 0-127. However,
	* pthread_attr_setschedparam does not allow 0; it allows 1-127.
	*/
	#define PT_PRIO_MIN 1
	#define PT_PRIO_MAX 127
	#elif defined(OPENBSD)
	#define PT_PRIO_MIN 0
	#define PT_PRIO_MAX 31
	#elif defined(NETBSD) \
	\|\| defined(BSDI) \|\| defined(DARWIN) \|\| defined(UNIXWARE) \
	\|\| defined(RISCOS) /* XXX */
	#define PT_PRIO_MIN 0
	#define PT_PRIO_MAX 126
	#else
	#error "pthreads is not supported for this architecture"
	#endif

	/*
	* The _PT_PTHREAD_YIELD function is called from a signal handler.
	* Needed for garbage collection -- Look at PR_Suspend/PR_Resume
	* implementation.
	*/
	#if defined(_PR_DCETHREADS)
	#define _PT_PTHREAD_YIELD() pthread_yield()
	#elif defined(OSF1)
	/*
	* sched_yield can't be called from a signal handler. Must use
	* the _np version.
	*/
	#define _PT_PTHREAD_YIELD() pthread_yield_np()
	#elif defined(AIX)
	extern int (*_PT_aix_yield_fcn)();
	#define _PT_PTHREAD_YIELD() (*_PT_aix_yield_fcn)()
	#elif defined(IRIX)
	#include <time.h>
	#define _PT_PTHREAD_YIELD() \
	PR_BEGIN_MACRO \
	struct timespec onemillisec = {0}; \
	onemillisec.tv_nsec = 1000000L; \
	nanosleep(&onemillisec,NULL); \
	PR_END_MACRO
	#elif defined(HPUX) \|\| defined(SOLARIS) \
	\|\| defined(LINUX) \|\| defined(__GNU__) \|\| defined(__GLIBC__) \
	\|\| defined(FREEBSD) \|\| defined(NETBSD) \|\| defined(OPENBSD) \
	\|\| defined(BSDI) \|\| defined(NTO) \|\| defined(DARWIN) \
	\|\| defined(UNIXWARE) \|\| defined(RISCOS) \|\| defined(SYMBIAN)
	#define _PT_PTHREAD_YIELD() sched_yield()
	#else
	#error "Need to define _PT_PTHREAD_YIELD for this platform"
	#endif

	#endif /* nspr_pth_defs_h_ */