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/* GNU Objective C Runtime Thread Implementation
Copyright (C) 1996, 1997, 2009 Free Software Foundation, Inc.
Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
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/>. */
#include "objc/thr.h"
#include "objc/runtime.h"
/* Thread local storage for a single thread */
static void *thread_local_storage = NULL;
/* Backend initialization functions */
/* Initialize the threads subsystem. */
int
__objc_init_thread_system(void)
{
/* No thread support available */
return -1;
}
/* Close the threads subsystem. */
int
__objc_close_thread_system(void)
{
/* No thread support available */
return -1;
}
/* Backend thread functions */
/* Create a new thread of execution. */
objc_thread_t
__objc_thread_detach(void (*func)(void *arg), void *arg)
{
/* No thread support available */
return NULL;
}
/* Set the current thread's priority. */
int
__objc_thread_set_priority(int priority)
{
/* No thread support available */
return -1;
}
/* Return the current thread's priority. */
int
__objc_thread_get_priority(void)
{
return OBJC_THREAD_INTERACTIVE_PRIORITY;
}
/* Yield our process time to another thread. */
void
__objc_thread_yield(void)
{
return;
}
/* Terminate the current thread. */
int
__objc_thread_exit(void)
{
/* No thread support available */
/* Should we really exit the program */
/* exit(&__objc_thread_exit_status); */
return -1;
}
/* Returns an integer value which uniquely describes a thread. */
objc_thread_t
__objc_thread_id(void)
{
/* No thread support, use 1. */
return (objc_thread_t)1;
}
/* Sets the thread's local storage pointer. */
int
__objc_thread_set_data(void *value)
{
thread_local_storage = value;
return 0;
}
/* Returns the thread's local storage pointer. */
void *
__objc_thread_get_data(void)
{
return thread_local_storage;
}
/* Backend mutex functions */
/* Allocate a mutex. */
int
__objc_mutex_allocate(objc_mutex_t mutex)
{
return 0;
}
/* Deallocate a mutex. */
int
__objc_mutex_deallocate(objc_mutex_t mutex)
{
return 0;
}
/* Grab a lock on a mutex. */
int
__objc_mutex_lock(objc_mutex_t mutex)
{
/* There can only be one thread, so we always get the lock */
return 0;
}
/* Try to grab a lock on a mutex. */
int
__objc_mutex_trylock(objc_mutex_t mutex)
{
/* There can only be one thread, so we always get the lock */
return 0;
}
/* Unlock the mutex */
int
__objc_mutex_unlock(objc_mutex_t mutex)
{
return 0;
}
/* Backend condition mutex functions */
/* Allocate a condition. */
int
__objc_condition_allocate(objc_condition_t condition)
{
return 0;
}
/* Deallocate a condition. */
int
__objc_condition_deallocate(objc_condition_t condition)
{
return 0;
}
/* Wait on the condition */
int
__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
{
return 0;
}
/* Wake up all threads waiting on this condition. */
int
__objc_condition_broadcast(objc_condition_t condition)
{
return 0;
}
/* Wake up one thread waiting on this condition. */
int
__objc_condition_signal(objc_condition_t condition)
{
return 0;
}
/* End of File */
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