+++ /dev/null
-/* GNU Objective C Runtime Thread Interface
- Copyright (C) 1996, 1997 Free Software Foundation, Inc.
- Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
- Conditions added by Mircea Oancea (mircea@first.elcom.pub.ro)
-
-This file is part of GNU CC.
-
-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.
-
-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.
-
-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. */
-
-/* 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 "runtime.h"
-
-#include <thread.h>
-#include <synch.h>
-#include <errno.h>
-
-/* Key structure for maintaining thread specific storage */
-static thread_key_t __objc_thread_data_key;
-
-/* Backend initialization functions */
-
-/* Initialize the threads subsystem. */
-int
-__objc_init_thread_system(void)
-{
- /* Initialize the thread storage key */
- if (thr_keycreate(&__objc_thread_data_key, NULL) == 0)
- return 0;
- else
- return -1;
-}
-
-/* Close the threads subsystem. */
-int
-__objc_close_thread_system(void)
-{
- return 0;
-}
-
-/* Backend thread functions */
-
-/* Create a new thread of execution. */
-objc_thread_t
-__objc_thread_detach(void (*func)(void *arg), void *arg)
-{
- objc_thread_t thread_id;
- thread_t new_thread_id = 0;
-
- if (thr_create(NULL, 0, (void *)func, arg,
- THR_DETACHED | THR_NEW_LWP,
- &new_thread_id) == 0)
- thread_id = *(objc_thread_t *)&new_thread_id;
- else
- thread_id = NULL;
-
- return thread_id;
-}
-
-/* Set the current thread's priority. */
-int
-__objc_thread_set_priority(int priority)
-{
- int sys_priority = 0;
-
- switch (priority)
- {
- case OBJC_THREAD_INTERACTIVE_PRIORITY:
- sys_priority = 300;
- break;
- default:
- case OBJC_THREAD_BACKGROUND_PRIORITY:
- sys_priority = 200;
- break;
- case OBJC_THREAD_LOW_PRIORITY:
- sys_priority = 1000;
- break;
- }
-
- /* Change priority */
- if (thr_setprio(thr_self(), sys_priority) == 0)
- return 0;
- else
- return -1;
-}
-
-/* Return the current thread's priority. */
-int
-__objc_thread_get_priority(void)
-{
- int sys_priority;
-
- if (thr_getprio(thr_self(), &sys_priority) == 0)
- {
- if (sys_priority >= 250)
- return OBJC_THREAD_INTERACTIVE_PRIORITY;
- else if (sys_priority >= 150)
- return OBJC_THREAD_BACKGROUND_PRIORITY;
- return OBJC_THREAD_LOW_PRIORITY;
- }
-
- /* Couldn't get priority. */
- return -1;
-}
-
-/* Yield our process time to another thread. */
-void
-__objc_thread_yield(void)
-{
- thr_yield();
-}
-
-/* Terminate the current thread. */
-int
-__objc_thread_exit(void)
-{
- /* exit the thread */
- thr_exit(&__objc_thread_exit_status);
-
- /* Failed if we reached here */
- return -1;
-}
-
-/* Returns an integer value which uniquely describes a thread. */
-objc_thread_t
-__objc_thread_id(void)
-{
- return (objc_thread_t)thr_self();
-}
-
-/* Sets the thread's local storage pointer. */
-int
-__objc_thread_set_data(void *value)
-{
- if (thr_setspecific(__objc_thread_data_key, value) == 0)
- return 0;
- else
- return -1;
-}
-
-/* Returns the thread's local storage pointer. */
-void *
-__objc_thread_get_data(void)
-{
- void *value = NULL;
-
- if (thr_getspecific(__objc_thread_data_key, &value) == 0)
- return value;
-
- return NULL;
-}
-
-/* Backend mutex functions */
-
-/* Allocate a mutex. */
-int
-__objc_mutex_allocate(objc_mutex_t mutex)
-{
- if (mutex_init( (mutex_t *)(&(mutex->backend)), USYNC_THREAD, 0))
- return -1;
- else
- return 0;
-}
-
-
-/* Deallocate a mutex. */
-int
-__objc_mutex_deallocate(objc_mutex_t mutex)
-{
- mutex_destroy((mutex_t *)(&(mutex->backend)));
- return 0;
-}
-
-/* Grab a lock on a mutex. */
-int
-__objc_mutex_lock(objc_mutex_t mutex)
-{
- if (mutex_lock((mutex_t *)(&(mutex->backend))) != 0)
- return -1;
- else
- return 0;
-}
-
-/* Try to grab a lock on a mutex. */
-int
-__objc_mutex_trylock(objc_mutex_t mutex)
-{
- if (mutex_trylock((mutex_t *)(&(mutex->backend))) != 0)
- return -1;
- else
- return 0;
-}
-
-/* Unlock the mutex */
-int
-__objc_mutex_unlock(objc_mutex_t mutex)
-{
- if (mutex_unlock((mutex_t *)(&(mutex->backend))) != 0)
- return -1;
- else
- return 0;
-}
-
-/* Backend condition mutex functions */
-
-/* Allocate a condition. */
-int
-__objc_condition_allocate(objc_condition_t condition)
-{
- return cond_init((cond_t *)(&(condition->backend)), USYNC_THREAD, NULL);
-}
-
-/* Deallocate a condition. */
-int
-__objc_condition_deallocate(objc_condition_t condition)
-{
- return cond_destroy((cond_t *)(&(condition->backend)));
-}
-
-/* Wait on the condition */
-int
-__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
-{
- return cond_wait((cond_t *)(&(condition->backend)),
- (mutex_t *)(&(mutex->backend)));
-}
-
-/* Wake up all threads waiting on this condition. */
-int
-__objc_condition_broadcast(objc_condition_t condition)
-{
- return cond_broadcast((cond_t *)(&(condition->backend)));
-}
-
-/* Wake up one thread waiting on this condition. */
-int
-__objc_condition_signal(objc_condition_t condition)
-{
- return cond_signal((cond_t *)(&(condition->backend)));
-}
-
-/* End of File */
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