1/* Threads compatibility routines for libgcc2 and libobjc for VxWorks. */ 2/* Compile this one with gcc. */ 3/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. 4 Contributed by Mike Stump <mrs@wrs.com>. 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify it under 9the terms of the GNU General Public License as published by the Free 10Software Foundation; either version 2, or (at your option) any later 11version. 12 13GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14WARRANTY; without even the implied warranty of MERCHANTABILITY or 15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16for more details. 17 18You should have received a copy of the GNU General Public License 19along with GCC; see the file COPYING. If not, write to the Free 20Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2102110-1301, USA. */ 22 23/* As a special exception, if you link this library with other files, 24 some of which are compiled with GCC, to produce an executable, 25 this library does not by itself cause the resulting executable 26 to be covered by the GNU General Public License. 27 This exception does not however invalidate any other reasons why 28 the executable file might be covered by the GNU General Public License. */ 29 30#ifndef GCC_GTHR_VXWORKS_H 31#define GCC_GTHR_VXWORKS_H 32 33#ifdef _LIBOBJC 34 35/* libobjc requires the optional pthreads component. */ 36#include "gthr-posix.h" 37 38#else 39 40#define __GTHREADS 1 41#define __gthread_active_p() 1 42 43/* Mutexes are easy, except that they need to be initialized at runtime. */ 44 45#include <semLib.h> 46 47typedef SEM_ID __gthread_mutex_t; 48/* All VxWorks mutexes are recursive. */ 49typedef SEM_ID __gthread_recursive_mutex_t; 50#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function 51#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function 52 53static inline void 54__gthread_mutex_init_function (__gthread_mutex_t *mutex) 55{ 56 *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); 57} 58 59static inline int 60__gthread_mutex_lock (__gthread_mutex_t *mutex) 61{ 62 return semTake (*mutex, WAIT_FOREVER); 63} 64 65static inline int 66__gthread_mutex_trylock (__gthread_mutex_t *mutex) 67{ 68 return semTake (*mutex, NO_WAIT); 69} 70 71static inline int 72__gthread_mutex_unlock (__gthread_mutex_t *mutex) 73{ 74 return semGive (*mutex); 75} 76 77static inline void 78__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) 79{ 80 __gthread_mutex_init_function (mutex); 81} 82 83static inline int 84__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) 85{ 86 return __gthread_mutex_lock (mutex); 87} 88 89static inline int 90__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) 91{ 92 return __gthread_mutex_trylock (mutex); 93} 94 95static inline int 96__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) 97{ 98 return __gthread_mutex_unlock (mutex); 99} 100 101/* pthread_once is complicated enough that it's implemented 102 out-of-line. See config/vxlib.c. */ 103 104typedef struct 105{ 106 volatile unsigned char busy; 107 volatile unsigned char done; 108} 109__gthread_once_t; 110 111#define __GTHREAD_ONCE_INIT { 0, 0 } 112 113extern int __gthread_once (__gthread_once_t *once, void (*func)(void)); 114 115/* Thread-specific data requires a great deal of effort, since VxWorks 116 is not really set up for it. See config/vxlib.c for the gory 117 details. All the TSD routines are sufficiently complex that they 118 need to be implemented out of line. */ 119 120typedef unsigned int __gthread_key_t; 121 122extern int __gthread_key_create (__gthread_key_t *keyp, void (*dtor)(void *)); 123extern int __gthread_key_delete (__gthread_key_t key); 124 125extern void *__gthread_getspecific (__gthread_key_t key); 126extern int __gthread_setspecific (__gthread_key_t key, void *ptr); 127 128#endif /* not _LIBOBJC */ 129 130#endif /* gthr-vxworks.h */ 131