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+/* Threads compatibility routines for libgcc2. */
+/* Compile this one with gcc. */
+/* Copyright (C) 1997, 1998, 2004 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 2, or (at your option) any later
+version.
+
+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 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 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. */
+
+#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
+ int __gthread_active_p ()
+ that returns 1 if thread system is active, 0 if not.
+
+ The threads interface must define the following types:
+ __gthread_key_t
+ __gthread_once_t
+ __gthread_mutex_t
+ __gthread_recursive_mutex_t
+
+ The threads interface must define the following macros:
+
+ __GTHREAD_ONCE_INIT
+ to initialize __gthread_once_t
+ __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_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_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);
+
+ 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
+ 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 (__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 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. */
+#else
+#include "gthr-single.h"
+#endif
+
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility pop
+#endif
+
+#endif /* ! GCC_GTHR_H */