X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;ds=sidebyside;f=gcc%2Fgthr-posix.h;h=940c7218ee5f639db1c10bd328505d9e6de02ae0;hb=d7997df08d801df20306d42f2c68cfe03d1acd26;hp=f420e5f8be5b75090be0e173f2fc9b990ad0b731;hpb=205b5771ac9338ca79b9191c4e57de74e05ef028;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/gthr-posix.h b/gcc/gthr-posix.h index f420e5f8be5..940c7218ee5 100644 --- a/gcc/gthr-posix.h +++ b/gcc/gthr-posix.h @@ -1,23 +1,24 @@ -/* Threads compatibility 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, 2001, 2002, 2003 + Free Software Foundation, Inc. -This file is part of GNU CC. +This file is part of GCC. -GNU CC 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 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. -GNU CC 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. +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 GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ +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, @@ -26,22 +27,36 @@ Boston, MA 02111-1307, USA. */ This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. */ -#ifndef __gthr_posix_h -#define __gthr_posix_h +#ifndef GCC_GTHR_POSIX_H +#define GCC_GTHR_POSIX_H /* POSIX threads specific definitions. - Easy, since the interface is just one-to-one mapping. */ + Easy, since the interface is just one-to-one mapping. */ #define __GTHREADS 1 +/* Some implementations of require this to be defined. */ +#ifndef _REENTRANT +#define _REENTRANT 1 +#endif + #include +#include typedef pthread_key_t __gthread_key_t; typedef pthread_once_t __gthread_once_t; typedef pthread_mutex_t __gthread_mutex_t; +typedef pthread_mutex_t __gthread_recursive_mutex_t; #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT +#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER) +#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER +#elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) +#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP +#else +#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function +#endif #if SUPPORTS_WEAK && GTHREAD_USE_WEAK @@ -52,15 +67,45 @@ typedef pthread_mutex_t __gthread_mutex_t; #pragma weak pthread_setspecific #pragma weak pthread_create -#pragma weak pthread_mutex_lock -#pragma weak pthread_mutex_trylock -#pragma weak pthread_mutex_unlock +#pragma weak pthread_mutex_lock +#pragma weak pthread_mutex_trylock +#pragma weak pthread_mutex_unlock +#pragma weak pthread_mutexattr_init +#pragma weak pthread_mutexattr_settype +#pragma weak pthread_mutexattr_destroy + +#pragma weak pthread_mutex_init -static void *__gthread_active_ptr = &pthread_create; +#if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK) +/* 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_destroy +#pragma weak pthread_self +#ifdef _POSIX_PRIORITY_SCHEDULING +#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING +#pragma weak sched_get_priority_max +#pragma weak sched_get_priority_min +#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ +#endif /* _POSIX_PRIORITY_SCHEDULING */ +#pragma weak sched_yield +#pragma weak pthread_attr_destroy +#pragma weak pthread_attr_init +#pragma weak pthread_attr_setdetachstate +#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING +#pragma weak pthread_getschedparam +#pragma weak pthread_setschedparam +#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ +#endif /* _LIBOBJC || _LIBOBJC_WEAK */ static inline int __gthread_active_p (void) { + static void *const __gthread_active_ptr = (void *) &pthread_create; return __gthread_active_ptr != 0; } @@ -74,31 +119,370 @@ __gthread_active_p (void) #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_once (__gthread_once_t *once, void (*func) (void)) +__gthread_objc_init_thread_system (void) { if (__gthread_active_p ()) - return pthread_once (once, func); + { + /* 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; + } + } + + 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 + { +#ifdef _POSIX_PRIORITY_SCHEDULING +#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING + 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)) == -1) + return -1; + + if ((priority_min = sched_get_priority_min (policy)) == -1) + 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; + } +#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ +#endif /* _POSIX_PRIORITY_SCHEDULING */ + return -1; + } } +/* Return the current thread's priority. */ static inline int -__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) +__gthread_objc_thread_get_priority (void) { - return pthread_key_create (key, dtor); +#ifdef _POSIX_PRIORITY_SCHEDULING +#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING + 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 +#endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */ +#endif /* _POSIX_PRIORITY_SCHEDULING */ + 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 ()) + return (objc_thread_t) pthread_self (); + else + return (objc_thread_t) 1; +} + +/* Sets the thread's local storage pointer. */ static inline int -__gthread_key_dtor (__gthread_key_t key, void *ptr) +__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) { - /* Just reset the key value to zero. */ - if (ptr) - return pthread_setspecific (key, 0); + 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 () + && pthread_mutex_lock ((pthread_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 () + && pthread_mutex_trylock ((pthread_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 () + && pthread_mutex_unlock ((pthread_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 ()) + { + 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); + else + return -1; +} + +static inline int +__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *)) +{ + return pthread_key_create (key, dtor); +} + static inline int __gthread_key_delete (__gthread_key_t key) { @@ -144,4 +528,45 @@ __gthread_mutex_unlock (__gthread_mutex_t *mutex) return 0; } -#endif /* not __gthr_posix_h */ +#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP +static inline int +__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex) +{ + if (__gthread_active_p ()) + { + pthread_mutexattr_t attr; + int r; + + r = pthread_mutexattr_init (&attr); + if (!r) + r = pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); + if (!r) + r = pthread_mutex_init (mutex, &attr); + if (!r) + r = pthread_mutexattr_destroy (&attr); + return r; + } +} +#endif + +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); +} + +#endif /* _LIBOBJC */ + +#endif /* ! GCC_GTHR_POSIX_H */