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[/] [openrisc/] [tags/] [gnu-dev/] [fsf-gcc-snapshot-1-mar-12/] [or1k-gcc/] [libgcc/] [config/] [gthr-vxworks.h] - Rev 734
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/* Threads compatibility routines for libgcc2 and libobjc for VxWorks. */ /* Compile this one with gcc. */ /* Copyright (C) 1997, 1999, 2000, 2008, 2009, 2011 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 3, 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. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #ifndef GCC_GTHR_VXWORKS_H #define GCC_GTHR_VXWORKS_H #ifdef _LIBOBJC /* libobjc requires the optional pthreads component. */ #include "gthr-posix.h" #else #ifdef __cplusplus #define UNUSED(x) #else #define UNUSED(x) x __attribute__((unused)) #endif #ifdef __cplusplus extern "C" { #endif #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; /* All VxWorks mutexes are recursive. */ typedef SEM_ID __gthread_recursive_mutex_t; #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_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_destroy (__gthread_mutex_t * UNUSED(mutex)) { return 0; } 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); } static inline void __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) { __gthread_mutex_init_function (mutex); } static inline int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex) { return __gthread_mutex_lock (mutex); } static inline int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex) { return __gthread_mutex_trylock (mutex); } static inline int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex) { return __gthread_mutex_unlock (mutex); } /* pthread_once is complicated enough that it's implemented out-of-line. See config/vxlib.c. */ typedef struct { #if !defined(__RTP__) #if defined(__PPC__) __attribute ((aligned (__alignof (unsigned)))) #endif volatile unsigned char busy; #endif volatile unsigned char done; #if !defined(__RTP__) && defined(__PPC__) /* PPC's test-and-set implementation requires a 4 byte aligned object, of which it only sets the first byte. We use padding here, in order to maintain some amount of backwards compatibility. Without this padding, gthread_once objects worked by accident because they happen to be static objects and the ppc port automatically increased their alignment to 4 bytes. */ unsigned char pad1; unsigned char pad2; #endif } __gthread_once_t; #if defined (__RTP__) # define __GTHREAD_ONCE_INIT { 0 } #elif defined (__PPC__) # define __GTHREAD_ONCE_INIT { 0, 0, 0, 0 } #else # define __GTHREAD_ONCE_INIT { 0, 0 } #endif 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); #undef UNUSED #ifdef __cplusplus } #endif #endif /* not _LIBOBJC */ #endif /* gthr-vxworks.h */
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