-/* Threads compatibily routines for libgcc2. */
+/* Threads compatibility routines for libgcc2. */
/* Compile this one with gcc. */
-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 2004, 2008, 2009 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC 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 2, or (at your option)
-any later version.
+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
+version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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.
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
+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
+<http://www.gnu.org/licenses/>. */
-#ifndef __gthr_h
-#define __gthr_h
+#ifndef GCC_GTHR_H
+#define GCC_GTHR_H
+
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility push(default)
+#endif
/* If this file is compiled with threads support, it must
#define __GTHREADS 1
to indicate that threads support is present. Also it has define
- function
+ function
int __gthread_active_p ()
that returns 1 if thread system is active, 0 if not.
__gthread_key_t
__gthread_once_t
__gthread_mutex_t
+ __gthread_recursive_mutex_t
The threads interface must define the following macros:
__GTHREAD_MUTEX_INIT
to initialize __gthread_mutex_t to get a fast
non-recursive mutex.
+ __GTHREAD_MUTEX_INIT_FUNCTION
+ 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
+ __GTHREAD_RECURSIVE_MUTEX_INIT
+ __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION
+ as above, but for a recursive mutex.
The threads interface must define the following static functions:
int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *))
int __gthread_key_delete (__gthread_key_t key)
- int __gthread_key_dtor (__gthread_key_t key, void *ptr)
-
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.
+
+ Types:
+ __gthread_cond_t
+
+ Macros:
+ __GTHREAD_COND_INIT
+ __GTHREAD_COND_INIT_FUNCTION
+
+ Interface:
+ 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.
+
+ Types:
+ __gthread_t
+ __gthread_time_t
+
+ Interface:
+ 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
- POSIX threads with -D_PTHREADS
+ 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 _PTHREADS
+/* Check first for thread specific defines. */
+#if defined (__tpf__)
+#include "gthr-tpf.h"
+#elif _PTHREADS
#include "gthr-posix.h"
+#elif _PTHREADS95
+#include "gthr-posix95.h"
#elif _DCE_THREADS
#include "gthr-dce.h"
#elif _SOLARIS_THREADS
#include "gthr-solaris.h"
-/* Include GTHREAD_FILE if one is defined. */
-#elif SUPPORTS_WEAK && HAVE_GTHR_DEFAULT
+/* Include GTHREAD_FILE if one is defined. */
+#elif defined(HAVE_GTHR_DEFAULT)
+#if SUPPORTS_WEAK
#ifndef GTHREAD_USE_WEAK
#define GTHREAD_USE_WEAK 1
#endif
+#endif
#include "gthr-default.h"
-/* Fallback to single thread definitions. */
+/* Fallback to single thread definitions. */
#else
#include "gthr-single.h"
#endif
-#endif /* not __gthr_h */
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility pop
+#endif
+
+#endif /* ! GCC_GTHR_H */
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