1/* Threads compatibily routines for libgcc2. */ 2/* Compile this one with gcc. */ 3/* Copyright (C) 1997, 1998 Free Software Foundation, Inc. 4 5This file is part of GNU CC. 6 7GNU CC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU CC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU CC; see the file COPYING. If not, write to 19the Free Software Foundation, 59 Temple Place - Suite 330, 20Boston, MA 02111-1307, USA. */ 21 22/* As a special exception, if you link this library with other files, 23 some of which are compiled with GCC, to produce an executable, 24 this library does not by itself cause the resulting executable 25 to be covered by the GNU General Public License. 26 This exception does not however invalidate any other reasons why 27 the executable file might be covered by the GNU General Public License. */ 28 29#ifndef __gthr_h 30#define __gthr_h 31 32/* If this file is compiled with threads support, it must 33 #define __GTHREADS 1 34 to indicate that threads support is present. Also it has define 35 function 36 int __gthread_active_p () 37 that returns 1 if thread system is active, 0 if not. 38 39 The threads interface must define the following types: 40 __gthread_key_t 41 __gthread_once_t 42 __gthread_mutex_t 43 44 The threads interface must define the following macros: 45 46 __GTHREAD_ONCE_INIT 47 to initialize __gthread_once_t 48 __GTHREAD_MUTEX_INIT 49 to initialize __gthread_mutex_t to get a fast 50 non-recursive mutex. 51 __GTHREAD_MUTEX_INIT_FUNCTION 52 some systems can't initalize a mutex without a 53 function call. On such systems, define this to a 54 function which looks like this: 55 void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *) 56 Don't define __GTHREAD_MUTEX_INIT in this case 57 58 The threads interface must define the following static functions: 59 60 int __gthread_once (__gthread_once_t *once, void (*func) ()) 61 62 int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *)) 63 int __gthread_key_delete (__gthread_key_t key) 64 65 int __gthread_key_dtor (__gthread_key_t key, void *ptr) 66 67 void *__gthread_getspecific (__gthread_key_t key) 68 int __gthread_setspecific (__gthread_key_t key, const void *ptr) 69 70 int __gthread_mutex_lock (__gthread_mutex_t *mutex); 71 int __gthread_mutex_trylock (__gthread_mutex_t *mutex); 72 int __gthread_mutex_unlock (__gthread_mutex_t *mutex); 73 74 All functions returning int should return zero on success or the error 75 number. If the operation is not supported, -1 is returned. 76 77 Currently supported threads packages are 78 POSIX threads with -D_PTHREADS 79 DCE threads with -D_DCE_THREADS 80 Solaris/UI threads with -D_SOLARIS_THREADS 81*/ 82 83/* Check first for thread specific defines. */ 84#if _PTHREADS 85#include "gthr-posix.h" 86#elif _DCE_THREADS 87#include "gthr-dce.h" 88#elif _SOLARIS_THREADS 89#include "gthr-solaris.h" 90#elif defined(__BEOS__) || defined(__HAIKU__) 91#include "gthr-beos.h" 92 93/* Include GTHREAD_FILE if one is defined. */ 94#elif defined(HAVE_GTHR_DEFAULT) 95#if SUPPORTS_WEAK 96#ifndef GTHREAD_USE_WEAK 97#define GTHREAD_USE_WEAK 1 98#endif 99#endif 100#include "gthr-default.h" 101 102/* Fallback to single thread definitions. */ 103#else 104#include "gthr-single.h" 105#endif 106 107#endif /* not __gthr_h */ 108