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/* Threads compatibility routines for libgcc2. */
/* Compile this one with gcc. */
/* Copyright (C) 1997, 1998, 2004, 2008, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<>. */
#pragma GCC visibility push(default)
/* If this file is compiled with threads support, it must
#define __GTHREADS 1
to indicate that threads support is present. Also it has define
int __gthread_active_p ()
that returns 1 if thread system is active, 0 if not.
The threads interface must define the following types:
The threads interface must define the following macros:
to initialize __gthread_once_t
to initialize __gthread_mutex_t to get a fast
non-recursive mutex.
some systems can't initialize a mutex without a
function call. On such systems, define this to a
function which looks like this:
void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *)
Don't define __GTHREAD_MUTEX_INIT in this case
as above, but for a recursive mutex.
The threads interface must define the following static functions:
int __gthread_once (__gthread_once_t *once, void (*func) ())
int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *))
int __gthread_key_delete (__gthread_key_t key)
void *__gthread_getspecific (__gthread_key_t key)
int __gthread_setspecific (__gthread_key_t key, const void *ptr)
int __gthread_mutex_destroy (__gthread_mutex_t *mutex);
int __gthread_mutex_lock (__gthread_mutex_t *mutex);
int __gthread_mutex_trylock (__gthread_mutex_t *mutex);
int __gthread_mutex_unlock (__gthread_mutex_t *mutex);
int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex);
int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex);
int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex);
The following are supported in POSIX threads only. They are required to
fix a deadlock in static initialization inside libsupc++. The header file
gthr-posix.h defines a symbol __GTHREAD_HAS_COND to signify that these extra
features are supported.
int __gthread_cond_broadcast (__gthread_cond_t *cond);
int __gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex);
int __gthread_cond_wait_recursive (__gthread_cond_t *cond,
__gthread_recursive_mutex_t *mutex);
All functions returning int should return zero on success or the error
number. If the operation is not supported, -1 is returned.
If the following are also defined, you should
#define __GTHREADS_CXX0X 1
to enable the c++0x thread library.
int __gthread_create (__gthread_t *thread, void *(*func) (void*),
void *args);
int __gthread_join (__gthread_t thread, void **value_ptr);
int __gthread_detach (__gthread_t thread);
int __gthread_equal (__gthread_t t1, __gthread_t t2);
__gthread_t __gthread_self (void);
int __gthread_yield (void);
int __gthread_mutex_timedlock (__gthread_mutex_t *m,
const __gthread_time_t *abs_timeout);
int __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *m,
const __gthread_time_t *abs_time);
int __gthread_cond_signal (__gthread_cond_t *cond);
int __gthread_cond_timedwait (__gthread_cond_t *cond,
__gthread_mutex_t *mutex,
const __gthread_time_t *abs_timeout);
int __gthread_cond_timedwait_recursive (__gthread_cond_t *cond,
__gthread_recursive_mutex_t *mutex,
const __gthread_time_t *abs_time)
Currently supported threads packages are
TPF threads with -D__tpf__
POSIX/Unix98 threads with -D_PTHREADS
POSIX/Unix95 threads with -D_PTHREADS95
DCE threads with -D_DCE_THREADS
Solaris/UI threads with -D_SOLARIS_THREADS
/* Check first for thread specific defines. */
#if defined (_GLIBCXX___tpf_GLIBCXX___)
#include <bits/gthr-tpf.h>
#include <bits/gthr-posix.h>
#include <bits/gthr-posix95.h>
#include <bits/gthr-dce.h>
#include <bits/gthr-solaris.h>
/* Include GTHREAD_FILE if one is defined. */
#if __GXX_WEAK__
#include <bits/gthr-default.h>
/* Fallback to single thread definitions. */
#include <bits/gthr-single.h>
#pragma GCC visibility pop
#endif /* ! _GLIBCXX_GCC_GTHR_H */