192 lines
3.9 KiB
C
192 lines
3.9 KiB
C
/* GNU Objective C Runtime Thread Implementation
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Copyright (C) 1996, 1997, 2009 Free Software Foundation, Inc.
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Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
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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 the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later 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 FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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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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#include "objc/thr.h"
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#include "objc/runtime.h"
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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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int
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__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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int
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__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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objc_thread_t
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__objc_thread_detach(void (*func)(void *arg), void *arg)
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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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int
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__objc_thread_set_priority(int priority)
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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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int
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__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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void
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__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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int
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__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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objc_thread_t
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__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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int
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__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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void *
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__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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int
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__objc_mutex_allocate(objc_mutex_t mutex)
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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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int
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__objc_mutex_deallocate(objc_mutex_t mutex)
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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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int
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__objc_mutex_lock(objc_mutex_t mutex)
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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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int
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__objc_mutex_trylock(objc_mutex_t mutex)
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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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int
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__objc_mutex_unlock(objc_mutex_t mutex)
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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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int
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__objc_condition_allocate(objc_condition_t condition)
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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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int
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__objc_condition_deallocate(objc_condition_t condition)
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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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int
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__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
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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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int
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__objc_condition_broadcast(objc_condition_t condition)
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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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int
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__objc_condition_signal(objc_condition_t condition)
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{
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return 0;
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}
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/* End of File */
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