1/* Threads compatibily routines for libgcc2. */ 2/* Compile this one with gcc. */ 3/* Copyright (C) 1997 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_beos_h 30#define __gthr_beos_h 31 32/* Simple spinlocks for mutex handling. We would need C++ for semaphores. */ 33 34/* we do our own thread-safe implementation */ 35#define __GTHREADS 0 36 37#if defined(MAX) 38#undef MAX 39#endif 40#if defined(MIN) 41#undef MIN 42#endif 43 44#include <OS.h> 45 46typedef int32 __gthread_mutex_t; 47 48#define __GTHREAD_MUTEX_INIT 0 49 50static inline int 51__gthread_active_p () 52{ 53 return 1; 54} 55 56/* the return value is not documented -- let's assume 0 for "no error" */ 57/* the only user I found was in frame.c, which doesn't check... */ 58static inline int 59__gthread_mutex_lock (__gthread_mutex_t *mutex) 60{ 61 while (atomic_or(mutex, 1)) { 62 snooze(3000); 63 } 64 return 0; 65} 66 67#if 0 68// This appears unused, so I will not implement it. 69// If it's needed later, we'll do it then. 70static inline int 71__gthread_mutex_trylock (__gthread_mutex_t *mutex __attribute__ ((__unused__))) 72{ 73 return 0; 74} 75#endif 76 77/* the return value is not documented -- let's assume 0 for "no error" */ 78/* the only user I found was in frame.c, which doesn't check... */ 79static inline int 80__gthread_mutex_unlock (__gthread_mutex_t *mutex) 81{ 82 /* assert(*mutex != 0); */ 83 atomic_and(mutex, 0); 84 return 0; 85} 86 87#endif /* not __gthr_beos_h */ 88