X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fgthr-posix.h;h=1e70f7237048e6e67885a4e0bc703317bd5c2a33;hb=ed684273f8bf24ead0ae7e3924d242ed5d6f7819;hp=19231c3c464d61c34292fc43ba395c97ad44867c;hpb=58febf9e878b004af36d51b927d91dbe4a9e0af0;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/gthr-posix.h b/gcc/gthr-posix.h index 19231c3c464..1e70f723704 100644 --- a/gcc/gthr-posix.h +++ b/gcc/gthr-posix.h @@ -1,6 +1,6 @@ -/* Threads compatibily routines for libgcc2. */ +/* Threads compatibility routines for libgcc2 and libobjc. */ /* Compile this one with gcc. */ -/* Copyright (C) 1997 Free Software Foundation, Inc. +/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. @@ -56,10 +56,29 @@ typedef pthread_mutex_t __gthread_mutex_t; #pragma weak pthread_mutex_trylock #pragma weak pthread_mutex_unlock +#ifdef _LIBOBJC +/* Objective C. */ +#pragma weak pthread_cond_broadcast +#pragma weak pthread_cond_destroy +#pragma weak pthread_cond_init +#pragma weak pthread_cond_signal +#pragma weak pthread_cond_wait +#pragma weak pthread_exit +#pragma weak pthread_mutex_init +#pragma weak pthread_mutex_destroy +#pragma weak pthread_self +#pragma weak sched_yield +#pragma weak pthread_attr_destroy +#pragma weak pthread_attr_init +#pragma weak pthread_attr_setdetachstate +#pragma weak pthread_getschedparam +#pragma weak pthread_setschedparam +#endif + static void *__gthread_active_ptr = &pthread_create; static inline int -__gthread_active_p () +__gthread_active_p (void) { return __gthread_active_ptr != 0; } @@ -67,15 +86,350 @@ __gthread_active_p () #else /* not SUPPORTS_WEAK */ static inline int -__gthread_active_p () +__gthread_active_p (void) { return 1; } #endif /* SUPPORTS_WEAK */ +#ifdef _LIBOBJC + +/* This is the config.h file in libobjc/ */ +#include + +#ifdef HAVE_SCHED_H +# include +#endif + +/* Key structure for maintaining thread specific storage */ +static pthread_key_t _objc_thread_storage; +static pthread_attr_t _objc_thread_attribs; + +/* 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) +{ + if (__gthread_active_p ()) + { + /* Initialize the thread storage key */ + if (pthread_key_create(&_objc_thread_storage, NULL) == 0) + { + /* The normal default detach state for threads is + * PTHREAD_CREATE_JOINABLE which causes threads to not die + * when you think they should. */ + if (pthread_attr_init(&_objc_thread_attribs) == 0 + && pthread_attr_setdetachstate(&_objc_thread_attribs, + PTHREAD_CREATE_DETACHED) == 0) + return 0; + } + } + else + return -1; +} + +/* Close the threads subsystem. */ +static inline int +__gthread_objc_close_thread_system(void) +{ + if (__gthread_active_p () + && pthread_key_delete(_objc_thread_storage) == 0 + && pthread_attr_destroy(&_objc_thread_attribs) == 0) + return 0; + + 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; + pthread_t new_thread_handle; + + if (!__gthread_active_p ()) + return NULL; + + if ( !(pthread_create(&new_thread_handle, NULL, (void *)func, arg)) ) + thread_id = *(objc_thread_t *)&new_thread_handle; + else + thread_id = NULL; + + return thread_id; +} + +/* Set the current thread's priority. */ +static inline int +__gthread_objc_thread_set_priority(int priority) +{ + if (!__gthread_active_p()) + return -1; + else { + pthread_t thread_id = pthread_self(); + int policy; + struct sched_param params; + int priority_min, priority_max; + + if (pthread_getschedparam(thread_id, &policy, ¶ms) == 0) + { + if ((priority_max = sched_get_priority_max(policy)) != 0) + return -1; + + if ((priority_min = sched_get_priority_min(policy)) != 0) + return -1; + + if (priority > priority_max) + priority = priority_max; + else if (priority < priority_min) + priority = priority_min; + params.sched_priority = priority; + + /* + * The solaris 7 and several other man pages incorrectly state that + * this should be a pointer to policy but pthread.h is universally + * at odds with this. + */ + if (pthread_setschedparam(thread_id, policy, ¶ms) == 0) + return 0; + } + return -1; + } +} + +/* Return the current thread's priority. */ +static inline int +__gthread_objc_thread_get_priority(void) +{ + if (__gthread_active_p ()) + { + int policy; + struct sched_param params; + + if (pthread_getschedparam(pthread_self(), &policy, ¶ms) == 0) + return params.sched_priority; + else + return -1; + } + else + return OBJC_THREAD_INTERACTIVE_PRIORITY; +} + +/* Yield our process time to another thread. */ +static inline void +__gthread_objc_thread_yield(void) +{ + if (__gthread_active_p ()) + sched_yield(); +} + +/* Terminate the current thread. */ +static inline int +__gthread_objc_thread_exit(void) +{ + if (__gthread_active_p ()) + /* exit the thread */ + pthread_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 ()) + { + pthread_t self = pthread_self(); + + return *(objc_thread_t *)&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 ()) + return pthread_setspecific(_objc_thread_storage, value); + else + { + thread_local_storage = value; + return 0; + } +} + +/* Returns the thread's local storage pointer. */ +static inline void * +__gthread_objc_thread_get_data(void) +{ + if (__gthread_active_p ()) + return pthread_getspecific(_objc_thread_storage); + 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 ()) + { + mutex->backend = objc_malloc(sizeof(pthread_mutex_t)); + + if (pthread_mutex_init((pthread_mutex_t *)mutex->backend, NULL)) + { + objc_free(mutex->backend); + mutex->backend = NULL; + return -1; + } + } + + return 0; +} + +/* Deallocate a mutex. */ +static inline int +__gthread_objc_mutex_deallocate(objc_mutex_t mutex) +{ + if (__gthread_active_p ()) + { + int count; + + /* + * Posix Threads specifically require that the thread be unlocked + * for pthread_mutex_destroy to work. + */ + + do + { + count = pthread_mutex_unlock((pthread_mutex_t *)mutex->backend); + if (count < 0) + return -1; + } + while (count); + + if (pthread_mutex_destroy((pthread_mutex_t *)mutex->backend)) + return -1; + + objc_free(mutex->backend); + mutex->backend = NULL; + } + return 0; +} + +/* Grab a lock on a mutex. */ +static inline int +__gthread_objc_mutex_lock(objc_mutex_t mutex) +{ + if (__gthread_active_p ()) + return pthread_mutex_lock((pthread_mutex_t *)mutex->backend); + else + 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 ()) + return pthread_mutex_trylock((pthread_mutex_t *)mutex->backend); + else + return 0; +} + +/* Unlock the mutex */ +static inline int +__gthread_objc_mutex_unlock(objc_mutex_t mutex) +{ + if (__gthread_active_p ()) + return pthread_mutex_unlock((pthread_mutex_t *)mutex->backend); + else + return 0; +} + +/* Backend condition mutex functions */ + +/* Allocate a condition. */ static inline int -__gthread_once (__gthread_once_t *once, void (*func) ()) +__gthread_objc_condition_allocate(objc_condition_t condition) +{ + if (__gthread_active_p ()) + { + condition->backend = objc_malloc(sizeof(pthread_cond_t)); + + if (pthread_cond_init((pthread_cond_t *)condition->backend, NULL)) + { + objc_free(condition->backend); + condition->backend = NULL; + return -1; + } + } + + return 0; +} + +/* Deallocate a condition. */ +static inline int +__gthread_objc_condition_deallocate(objc_condition_t condition) +{ + if (__gthread_active_p ()) + { + if (pthread_cond_destroy((pthread_cond_t *)condition->backend)) + return -1; + + objc_free(condition->backend); + condition->backend = NULL; + } + 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 pthread_cond_wait((pthread_cond_t *)condition->backend, + (pthread_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 pthread_cond_broadcast((pthread_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 pthread_cond_signal((pthread_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 pthread_once (once, func); @@ -144,4 +498,6 @@ __gthread_mutex_unlock (__gthread_mutex_t *mutex) return 0; } +#endif /* _LIBOBJC */ + #endif /* not __gthr_posix_h */