_pth.h
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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 ***** */
- #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(DARWIN)
- #define _PT_PTHREAD_CONDATTR_INIT(x) 0
- #else
- #define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_init
- #endif
- #define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_destroy
- #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(HPUX) || defined(LINUX) || defined(FREEBSD)
- || defined(NETBSD) || defined(OPENBSD) || defined(BSDI)
- || defined(VMS) || defined(NTO) || defined(DARWIN)
- || defined(UNIXWARE) || defined(RISCOS)
- #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(FREEBSD) || defined(NETBSD) || defined(OPENBSD)
- || defined(BSDI) || defined(VMS) || defined(UNIXWARE)
- || defined(DARWIN)
- #define PT_NO_SIGTIMEDWAIT
- #endif
- /*
- * These platforms don't have pthread_kill()
- */
- #if defined(DARWIN)
- #define pthread_kill(thread, sig) ENOSYS
- #endif
- #if defined(OSF1) || defined(VMS)
- #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(FREEBSD)
- #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) || defined(VMS)
- /*
- * 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(LINUX) || defined(SOLARIS)
- || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD)
- || defined(BSDI) || defined(NTO) || defined(DARWIN)
- || defined(UNIXWARE) || defined(RISCOS)
- #define _PT_PTHREAD_YIELD() sched_yield()
- #else
- #error "Need to define _PT_PTHREAD_YIELD for this platform"
- #endif
- #endif /* nspr_pth_defs_h_ */