-/* 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 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 2, 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. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* As a special exception, if you link this library with other files,
some of which are compiled with GCC, to produce an executable,
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License. */
-#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.
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. */
+/* Include GTHREAD_FILE if one is defined. */
#elif defined(HAVE_GTHR_DEFAULT)
#if SUPPORTS_WEAK
#ifndef GTHREAD_USE_WEAK
#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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