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- /* Threads compatibility routines for libgcc2. */
- /* Compile this one with gcc. */
- /* Copyright (C) 1997, 1998 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, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, 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 _GLIBCPP_GCC_GTHR_H
- #define _GLIBCPP_GCC_GTHR_H
-
- /* 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
-
- 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
-
- 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)
-
- 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_lock (__gthread_mutex_t *mutex);
- int __gthread_mutex_trylock (__gthread_mutex_t *mutex);
- int __gthread_mutex_unlock (__gthread_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
- DCE threads with -D_DCE_THREADS
- Solaris/UI threads with -D_SOLARIS_THREADS
- */
-
- /* Check first for thread specific defines. */
- #if _GLIBCPP__PTHREADS
- #include <bits/gthr-posix.h>
- #elif _GLIBCPP__DCE_THREADS
- #include <bits/gthr-dce.h>
- #elif _GLIBCPP__SOLARIS_THREADS
- #include <bits/gthr-solaris.h>
-
- /* Include GTHREAD_FILE if one is defined. */
- #elif defined(_GLIBCPP_HAVE_GTHR_DEFAULT)
- #if _GLIBCPP_SUPPORTS_WEAK
- #ifndef _GLIBCPP_GTHREAD_USE_WEAK
- #define _GLIBCPP_GTHREAD_USE_WEAK 1
- #endif
- #endif
- #include <bits/gthr-default.h>
-
- /* Fallback to single thread definitions. */
- #else
- #include <bits/gthr-single.h>
- #endif
-
- #endif /* ! _GLIBCPP_GCC_GTHR_H */
-