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Diffstat (limited to 'libgcc/config/gthr-vxworks.h')
| -rw-r--r-- | libgcc/config/gthr-vxworks.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/libgcc/config/gthr-vxworks.h b/libgcc/config/gthr-vxworks.h new file mode 100644 index 0000000..2346b52 --- /dev/null +++ b/libgcc/config/gthr-vxworks.h @@ -0,0 +1,170 @@ +/* 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 "config/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 */ |