299 lines
6.3 KiB
C
299 lines
6.3 KiB
C
/* Threads compatibility routines for libgcc2 and libobjc. */
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/* Compile this one with gcc. */
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/* Copyright (C) 1997-2014 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_GTHR_SINGLE_H
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#define GCC_GTHR_SINGLE_H
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/* Just provide compatibility for mutex handling. */
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typedef int __gthread_key_t;
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typedef int __gthread_once_t;
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typedef int __gthread_mutex_t;
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typedef int __gthread_recursive_mutex_t;
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#define __GTHREAD_ONCE_INIT 0
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#define __GTHREAD_MUTEX_INIT 0
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#define __GTHREAD_MUTEX_INIT_FUNCTION(mx)
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#define __GTHREAD_RECURSIVE_MUTEX_INIT 0
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#define UNUSED __attribute__((unused))
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#ifdef _LIBOBJC
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/* Thread local storage for a single thread */
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static void *thread_local_storage = NULL;
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/* Backend initialization functions */
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/* Initialize the threads subsystem. */
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static inline int
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__gthread_objc_init_thread_system (void)
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{
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/* No thread support available */
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return -1;
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}
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/* Close the threads subsystem. */
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static inline int
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__gthread_objc_close_thread_system (void)
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{
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/* No thread support available */
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return -1;
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}
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/* Backend thread functions */
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/* Create a new thread of execution. */
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static inline objc_thread_t
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__gthread_objc_thread_detach (void (* func)(void *), void * arg UNUSED)
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{
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/* No thread support available */
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return NULL;
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}
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/* Set the current thread's priority. */
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static inline int
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__gthread_objc_thread_set_priority (int priority UNUSED)
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{
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/* No thread support available */
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return -1;
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}
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/* Return the current thread's priority. */
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static inline int
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__gthread_objc_thread_get_priority (void)
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{
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return OBJC_THREAD_INTERACTIVE_PRIORITY;
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}
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/* Yield our process time to another thread. */
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static inline void
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__gthread_objc_thread_yield (void)
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{
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return;
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}
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/* Terminate the current thread. */
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static inline int
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__gthread_objc_thread_exit (void)
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{
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/* No thread support available */
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/* Should we really exit the program */
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/* exit (&__objc_thread_exit_status); */
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return -1;
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}
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/* Returns an integer value which uniquely describes a thread. */
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static inline objc_thread_t
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__gthread_objc_thread_id (void)
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{
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/* No thread support, use 1. */
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return (objc_thread_t) 1;
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}
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/* Sets the thread's local storage pointer. */
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static inline int
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__gthread_objc_thread_set_data (void *value)
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{
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thread_local_storage = value;
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return 0;
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}
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/* Returns the thread's local storage pointer. */
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static inline void *
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__gthread_objc_thread_get_data (void)
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{
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return thread_local_storage;
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}
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/* Backend mutex functions */
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/* Allocate a mutex. */
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static inline int
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__gthread_objc_mutex_allocate (objc_mutex_t mutex UNUSED)
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{
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return 0;
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}
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/* Deallocate a mutex. */
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static inline int
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__gthread_objc_mutex_deallocate (objc_mutex_t mutex UNUSED)
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{
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return 0;
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}
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/* Grab a lock on a mutex. */
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static inline int
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__gthread_objc_mutex_lock (objc_mutex_t mutex UNUSED)
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{
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/* There can only be one thread, so we always get the lock */
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return 0;
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}
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/* Try to grab a lock on a mutex. */
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static inline int
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__gthread_objc_mutex_trylock (objc_mutex_t mutex UNUSED)
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{
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/* There can only be one thread, so we always get the lock */
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return 0;
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}
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/* Unlock the mutex */
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static inline int
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__gthread_objc_mutex_unlock (objc_mutex_t mutex UNUSED)
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{
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return 0;
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}
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/* Backend condition mutex functions */
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/* Allocate a condition. */
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static inline int
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__gthread_objc_condition_allocate (objc_condition_t condition UNUSED)
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{
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return 0;
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}
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/* Deallocate a condition. */
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static inline int
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__gthread_objc_condition_deallocate (objc_condition_t condition UNUSED)
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{
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return 0;
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}
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/* Wait on the condition */
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static inline int
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__gthread_objc_condition_wait (objc_condition_t condition UNUSED,
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objc_mutex_t mutex UNUSED)
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{
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return 0;
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}
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/* Wake up all threads waiting on this condition. */
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static inline int
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__gthread_objc_condition_broadcast (objc_condition_t condition UNUSED)
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{
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return 0;
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}
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/* Wake up one thread waiting on this condition. */
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static inline int
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__gthread_objc_condition_signal (objc_condition_t condition UNUSED)
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{
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return 0;
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}
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#else /* _LIBOBJC */
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static inline int
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__gthread_active_p (void)
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{
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return 0;
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}
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static inline int
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__gthread_once (__gthread_once_t *__once UNUSED, void (*__func) (void) UNUSED)
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{
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return 0;
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}
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static inline int UNUSED
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__gthread_key_create (__gthread_key_t *__key UNUSED, void (*__func) (void *) UNUSED)
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{
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return 0;
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}
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static int UNUSED
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__gthread_key_delete (__gthread_key_t __key UNUSED)
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{
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return 0;
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}
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static inline void *
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__gthread_getspecific (__gthread_key_t __key UNUSED)
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{
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return 0;
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}
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static inline int
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__gthread_setspecific (__gthread_key_t __key UNUSED, const void *__v UNUSED)
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{
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return 0;
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}
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static inline int
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__gthread_mutex_destroy (__gthread_mutex_t *__mutex UNUSED)
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{
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return 0;
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}
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static inline int
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__gthread_mutex_lock (__gthread_mutex_t *__mutex UNUSED)
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{
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return 0;
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}
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static inline int
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__gthread_mutex_trylock (__gthread_mutex_t *__mutex UNUSED)
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{
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return 0;
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}
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static inline int
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__gthread_mutex_unlock (__gthread_mutex_t *__mutex UNUSED)
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{
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return 0;
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}
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static inline int
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__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
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{
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return __gthread_mutex_lock (__mutex);
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}
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static inline int
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__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
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{
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return __gthread_mutex_trylock (__mutex);
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}
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static inline int
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__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
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{
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return __gthread_mutex_unlock (__mutex);
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}
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static inline int
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__gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex)
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{
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return __gthread_mutex_destroy (__mutex);
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}
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#endif /* _LIBOBJC */
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#undef UNUSED
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#endif /* ! GCC_GTHR_SINGLE_H */
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