/* GNU Objective C Runtime Thread Implementation   Copyright (C) 1996, 1997 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 theterms of the GNU General Public License as published by the Free SoftwareFoundation; either version 2, or (at your option) any later version.GCC is distributed in the hope that it will be useful, but WITHOUT ANYWARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESSFOR A PARTICULAR PURPOSE.  See the GNU General Public License for moredetails.You should have received a copy of the GNU General Public License along withGCC; see the file COPYING.  If not, write to the Free SoftwareFoundation, 51 Franklin Street, Fifth Floor,Boston, MA 02110-1301, USA.  *//* As a special exception, if you link this library with files compiled with   GCC to produce an executable, this does not cause the resulting executable   to be covered by the GNU General Public License. This exception does not   however invalidate any other reasons why the executable file might be   covered by the GNU General Public License.  */#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 */