зеркало из https://github.com/mozilla/gecko-dev.git
187 строки
7.6 KiB
C
187 строки
7.6 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#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()
|
|
|
|
#if 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(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)
|
|
#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_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
|
|
|
|
/*
|
|
* 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)
|
|
#define PT_NO_SIGTIMEDWAIT
|
|
#endif
|
|
|
|
#if 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)
|
|
#include <sys/sched.h>
|
|
#define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
|
|
#define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
|
|
#elif defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
|
|
|| 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(AIX)
|
|
extern int (*_PT_aix_yield_fcn)();
|
|
#define _PT_PTHREAD_YIELD() (*_PT_aix_yield_fcn)()
|
|
#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)
|
|
#define _PT_PTHREAD_YIELD() sched_yield()
|
|
#else
|
|
#error "Need to define _PT_PTHREAD_YIELD for this platform"
|
|
#endif
|
|
|
|
#endif /* nspr_pth_defs_h_ */
|