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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [gthr-solaris.h] - Rev 328
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/* Threads compatibility routines for libgcc2 and libobjc. */ /* Compile this one with gcc. */ /* Copyright (C) 1997, 1999, 2000, 2004, 2005, 2006, 2008, 2009 Free Software Foundation, Inc. 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_SOLARIS_H #define GCC_GTHR_SOLARIS_H /* Solaris threads as found in Solaris 2.[456]. Actually these are Unix International (UI) threads, but I don't know if anyone else implements these. */ #define __GTHREADS 1 #include <thread.h> #include <errno.h> #ifdef __cplusplus #define UNUSED(x) #else #define UNUSED(x) x __attribute__((unused)) #endif typedef thread_key_t __gthread_key_t; typedef struct { mutex_t mutex; int once; } __gthread_once_t; typedef mutex_t __gthread_mutex_t; typedef struct { long depth; thread_t owner; mutex_t actual; } __gthread_recursive_mutex_t; #define __GTHREAD_ONCE_INIT { DEFAULTMUTEX, 0 } #define __GTHREAD_MUTEX_INIT DEFAULTMUTEX #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function #if SUPPORTS_WEAK && GTHREAD_USE_WEAK # define __gthrw(name) \ static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name))); # define __gthrw_(name) __gthrw_ ## name #else # define __gthrw(name) # define __gthrw_(name) name #endif __gthrw(thr_keycreate) __gthrw(thr_getspecific) __gthrw(thr_setspecific) __gthrw(thr_create) __gthrw(thr_self) __gthrw(mutex_init) __gthrw(mutex_destroy) __gthrw(mutex_lock) __gthrw(mutex_trylock) __gthrw(mutex_unlock) #ifdef _LIBOBJC __gthrw(thr_exit) __gthrw(thr_getprio) __gthrw(thr_setprio) __gthrw(thr_yield) __gthrw(cond_init) __gthrw(cond_destroy) __gthrw(cond_wait) __gthrw(cond_broadcast) __gthrw(cond_signal) #endif #if SUPPORTS_WEAK && GTHREAD_USE_WEAK /* This will not actually work in Solaris 2.5, since libc contains dummy symbols of all thr_* routines. */ static inline int __gthread_active_p (void) { static void *const __gthread_active_ptr = __extension__ (void *) &__gthrw_(thr_create); return __gthread_active_ptr != 0; } #else /* not SUPPORTS_WEAK */ static inline int __gthread_active_p (void) { return 1; } #endif /* SUPPORTS_WEAK */ #ifdef _LIBOBJC /* Key structure for maintaining thread specific storage */ static thread_key_t _objc_thread_storage; /* Thread local storage for a single thread */ static void *thread_local_storage = NULL; /* Backend initialization functions */ /* Initialize the threads subsystem. */ static inline int __gthread_objc_init_thread_system (void) { /* Initialize the thread storage key. */ if (__gthread_active_p () && __gthrw_(thr_keycreate) (&_objc_thread_storage, NULL) == 0) return 0; return -1; } /* Close the threads subsystem. */ static inline int __gthread_objc_close_thread_system (void) { if (__gthread_active_p ()) return 0; else return -1; } /* Backend thread functions */ /* Create a new thread of execution. */ static inline objc_thread_t __gthread_objc_thread_detach (void (*func)(void *), void *arg) { objc_thread_t thread_id; thread_t new_thread_id = 0; if (!__gthread_active_p ()) return NULL; if (__gthrw_(thr_create) (NULL, 0, (void *) func, arg, THR_DETACHED | THR_NEW_LWP, &new_thread_id) == 0) thread_id = *(objc_thread_t *) &new_thread_id; else thread_id = NULL; return thread_id; } /* Set the current thread's priority. */ static inline int __gthread_objc_thread_set_priority (int priority) { int sys_priority = 0; if (!__gthread_active_p ()) return -1; switch (priority) { case OBJC_THREAD_INTERACTIVE_PRIORITY: sys_priority = 300; break; default: case OBJC_THREAD_BACKGROUND_PRIORITY: sys_priority = 200; break; case OBJC_THREAD_LOW_PRIORITY: sys_priority = 1000; break; } /* Change priority */ if (__gthrw_(thr_setprio) (__gthrw_(thr_self) (), sys_priority) == 0) return 0; else return -1; } /* Return the current thread's priority. */ static inline int __gthread_objc_thread_get_priority (void) { int sys_priority; if (!__gthread_active_p ()) return OBJC_THREAD_INTERACTIVE_PRIORITY; if (__gthrw_(thr_getprio) (__gthrw_(thr_self) (), &sys_priority) == 0) { if (sys_priority >= 250) return OBJC_THREAD_INTERACTIVE_PRIORITY; else if (sys_priority >= 150) return OBJC_THREAD_BACKGROUND_PRIORITY; return OBJC_THREAD_LOW_PRIORITY; } /* Couldn't get priority. */ return -1; } /* Yield our process time to another thread. */ static inline void __gthread_objc_thread_yield (void) { if (__gthread_active_p ()) __gthrw_(thr_yield) (); } /* Terminate the current thread. */ static inline int __gthread_objc_thread_exit (void) { if (__gthread_active_p ()) /* exit the thread */ __gthrw_(thr_exit) (&__objc_thread_exit_status); /* Failed if we reached here */ return -1; } /* Returns an integer value which uniquely describes a thread. */ static inline objc_thread_t __gthread_objc_thread_id (void) { if (__gthread_active_p ()) return (objc_thread_t) __gthrw_(thr_self) (); else return (objc_thread_t) 1; } /* Sets the thread's local storage pointer. */ static inline int __gthread_objc_thread_set_data (void *value) { if (__gthread_active_p ()) { if (__gthrw_(thr_setspecific) (_objc_thread_storage, value) == 0) return 0; else return -1; } else { thread_local_storage = value; return 0; } } /* Returns the thread's local storage pointer. */ static inline void * __gthread_objc_thread_get_data (void) { void *value = NULL; if (__gthread_active_p ()) { if (__gthrw_(thr_getspecific) (_objc_thread_storage, &value) == 0) return value; else return NULL; } else return thread_local_storage; } /* Backend mutex functions */ /* Allocate a mutex. */ static inline int __gthread_objc_mutex_allocate (objc_mutex_t mutex) { if (__gthread_active_p () && __gthrw_(mutex_init) ((mutex_t *) (&(mutex->backend)), USYNC_THREAD, 0)) return -1; return 0; } /* Deallocate a mutex. */ static inline int __gthread_objc_mutex_deallocate (objc_mutex_t mutex) { if (__gthread_active_p ()) __gthrw_(mutex_destroy) ((mutex_t *) (&(mutex->backend))); return 0; } /* Grab a lock on a mutex. */ static inline int __gthread_objc_mutex_lock (objc_mutex_t mutex) { if (__gthread_active_p () && __gthrw_(mutex_lock) ((mutex_t *) (&(mutex->backend))) != 0) return -1; return 0; } /* Try to grab a lock on a mutex. */ static inline int __gthread_objc_mutex_trylock (objc_mutex_t mutex) { if (__gthread_active_p () && __gthrw_(mutex_trylock) ((mutex_t *) (&(mutex->backend))) != 0) return -1; return 0; } /* Unlock the mutex */ static inline int __gthread_objc_mutex_unlock (objc_mutex_t mutex) { if (__gthread_active_p () && __gthrw_(mutex_unlock) ((mutex_t *) (&(mutex->backend))) != 0) return -1; return 0; } /* Backend condition mutex functions */ /* Allocate a condition. */ static inline int __gthread_objc_condition_allocate (objc_condition_t condition) { if (__gthread_active_p ()) return __gthrw_(cond_init) ((cond_t *) (&(condition->backend)), USYNC_THREAD, NULL); else return 0; } /* Deallocate a condition. */ static inline int __gthread_objc_condition_deallocate (objc_condition_t condition) { if (__gthread_active_p ()) return __gthrw_(cond_destroy) ((cond_t *) (&(condition->backend))); else return 0; } /* Wait on the condition */ static inline int __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex) { if (__gthread_active_p ()) return __gthrw_(cond_wait) ((cond_t *) (&(condition->backend)), (mutex_t *) (&(mutex->backend))); else return 0; } /* Wake up all threads waiting on this condition. */ static inline int __gthread_objc_condition_broadcast (objc_condition_t condition) { if (__gthread_active_p ()) return __gthrw_(cond_broadcast) ((cond_t *) (&(condition->backend))); else return 0; } /* Wake up one thread waiting on this condition. */ static inline int __gthread_objc_condition_signal (objc_condition_t condition) { if (__gthread_active_p ()) return __gthrw_(cond_signal) ((cond_t *) (&(condition->backend))); else return 0; } #else /* _LIBOBJC */ static inline int __gthread_once (__gthread_once_t *__once, void (*__func) (void)) { if (! __gthread_active_p ()) return -1; if (__once == 0 || __func == 0) return EINVAL; if (__once->once == 0) { int __status = __gthrw_(mutex_lock) (&__once->mutex); if (__status != 0) return __status; if (__once->once == 0) { (*__func) (); __once->once++; } __gthrw_(mutex_unlock) (&__once->mutex); } return 0; } static inline int __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *)) { /* Solaris 2.5 contains thr_* routines no-op in libc, so test if we actually got a reasonable key value, and if not, fail. */ *__key = (__gthread_key_t)-1; if (__gthrw_(thr_keycreate) (__key, __dtor) != 0 || *__key == (__gthread_key_t)-1) return -1; else return 0; } static inline int __gthread_key_delete (__gthread_key_t UNUSED (__key)) { /* Not possible. */ return -1; } static inline void * __gthread_getspecific (__gthread_key_t __key) { void *__ptr; if (__gthrw_(thr_getspecific) (__key, &__ptr) == 0) return __ptr; else return 0; } static inline int __gthread_setspecific (__gthread_key_t __key, const void *__ptr) { return __gthrw_(thr_setspecific) (__key, (void *) __ptr); } static inline int __gthread_mutex_destroy (__gthread_mutex_t *__mutex) { if (__gthread_active_p ()) return __gthrw_(mutex_destroy) (__mutex); else return 0; } static inline int __gthread_mutex_lock (__gthread_mutex_t *__mutex) { if (__gthread_active_p ()) return __gthrw_(mutex_lock) (__mutex); else return 0; } static inline int __gthread_mutex_trylock (__gthread_mutex_t *__mutex) { if (__gthread_active_p ()) return __gthrw_(mutex_trylock) (__mutex); else return 0; } static inline int __gthread_mutex_unlock (__gthread_mutex_t *__mutex) { if (__gthread_active_p ()) return __gthrw_(mutex_unlock) (__mutex); else return 0; } static inline int __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex) { __mutex->depth = 0; __mutex->owner = (thread_t) 0; return __gthrw_(mutex_init) (&__mutex->actual, USYNC_THREAD, 0); } static inline int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex) { if (__gthread_active_p ()) { thread_t __me = __gthrw_(thr_self) (); if (__mutex->owner != __me) { __gthrw_(mutex_lock) (&__mutex->actual); __mutex->owner = __me; } __mutex->depth++; } return 0; } static inline int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex) { if (__gthread_active_p ()) { thread_t __me = __gthrw_(thr_self) (); if (__mutex->owner != __me) { if (__gthrw_(mutex_trylock) (&__mutex->actual)) return 1; __mutex->owner = __me; } __mutex->depth++; } return 0; } static inline int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex) { if (__gthread_active_p ()) { if (--__mutex->depth == 0) { __mutex->owner = (thread_t) 0; __gthrw_(mutex_unlock) (&__mutex->actual); } } return 0; } #endif /* _LIBOBJC */ #undef UNUSED #endif /* ! GCC_GTHR_SOLARIS_H */
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