gcc/libobjc/thr-solaris.c

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/* GNU Objective C Runtime Thread Interface
Copyright (C) 1996, 1997, 2009 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 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"
#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 */