| /* Threads compatibility routines for libgcc2 and libobjc for VxWorks. */ |
| /* Compile this one with gcc. */ |
| /* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. |
| Contributed by Mike Stump <mrs@wrs.com>. |
| |
| 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 GCC_GTHR_VXWORKS_H |
| #define GCC_GTHR_VXWORKS_H |
| |
| #ifdef _LIBOBJC |
| |
| /* libobjc requires the optional pthreads component. */ |
| #include "gthr-posix.h" |
| |
| #else |
| |
| #define __GTHREADS 1 |
| #define __gthread_active_p() 1 |
| |
| /* Mutexes are easy, except that they need to be initialized at runtime. */ |
| |
| #include <semLib.h> |
| |
| typedef SEM_ID __gthread_mutex_t; |
| #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function |
| |
| static inline void |
| __gthread_mutex_init_function (__gthread_mutex_t *mutex) |
| { |
| *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE); |
| } |
| |
| static inline int |
| __gthread_mutex_lock (__gthread_mutex_t *mutex) |
| { |
| return semTake (*mutex, WAIT_FOREVER); |
| } |
| |
| static inline int |
| __gthread_mutex_trylock (__gthread_mutex_t *mutex) |
| { |
| return semTake (*mutex, NO_WAIT); |
| } |
| |
| static inline int |
| __gthread_mutex_unlock (__gthread_mutex_t *mutex) |
| { |
| return semGive (*mutex); |
| } |
| |
| /* pthread_once is complicated enough that it's implemented |
| out-of-line. See config/vxlib.c. */ |
| |
| typedef struct |
| { |
| volatile unsigned char busy; |
| volatile unsigned char done; |
| } |
| __gthread_once_t; |
| |
| #define __GTHREAD_ONCE_INIT { 0, 0 } |
| |
| extern int __gthread_once (__gthread_once_t *once, void (*func)(void)); |
| |
| /* Thread-specific data requires a great deal of effort, since VxWorks |
| is not really set up for it. See config/vxlib.c for the gory |
| details. All the TSD routines are sufficiently complex that they |
| need to be implemented out of line. */ |
| |
| typedef unsigned int __gthread_key_t; |
| |
| extern int __gthread_key_create (__gthread_key_t *keyp, void (*dtor)(void *)); |
| extern int __gthread_key_delete (__gthread_key_t key); |
| |
| extern void *__gthread_getspecific (__gthread_key_t key); |
| extern int __gthread_setspecific (__gthread_key_t key, void *ptr); |
| |
| #endif /* not _LIBOBJC */ |
| |
| #endif /* gthr-vxworks.h */ |