/* GNU Objective C Runtime Thread Interface for POSIX compliant threads
- Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 2009 Free Software Foundation, Inc.
Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
Modified for Linux/Pthreads by Kai-Uwe Sattler (kus@iti.cs.uni-magdeburg.de)
+ Modified for posix compliance by Chris Ball (cball@fmco.com)
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify it under the
+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 2, or (at your option) any later version.
+Foundation; either version 3, or (at your option) any later version.
-GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
+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.
-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. */
+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.
-/* 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. */
+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 "runtime.h"
+
+#include "objc/thr.h"
+#include "objc/runtime.h"
#include <pthread.h>
/* Key structure for maintaining thread specific storage */
static pthread_key_t _objc_thread_storage;
+static pthread_attr_t _objc_thread_attribs;
/* Backend initialization functions */
__objc_init_thread_system(void)
{
/* Initialize the thread storage key */
- return pthread_key_create(&_objc_thread_storage, NULL);
+ if (pthread_key_create(&_objc_thread_storage, NULL) == 0)
+ {
+ /*
+ * The normal default detach state for threads is PTHREAD_CREATE_JOINABLE
+ * which causes threads to not die when you think they should.
+ */
+ if (pthread_attr_init(&_objc_thread_attribs) == 0)
+ {
+ if (pthread_attr_setdetachstate(&_objc_thread_attribs,
+ PTHREAD_CREATE_DETACHED) == 0)
+ return 0;
+ }
+ }
+
+ return -1;
}
/* Close the threads subsystem. */
int
__objc_close_thread_system(void)
{
- return 0;
+ if (pthread_key_delete(_objc_thread_storage) == 0)
+ {
+ if (pthread_attr_destroy(&_objc_thread_attribs) == 0)
+ return 0;
+ }
+
+ return -1;
}
/* Backend thread functions */
{
objc_thread_t thread_id;
pthread_t new_thread_handle;
-
- if ( !(pthread_create(&new_thread_handle, NULL, (void *)func, arg)) )
- thread_id = *(objc_thread_t *)&new_thread_handle;
+
+ if (!(pthread_create(&new_thread_handle, &_objc_thread_attribs,
+ (void *)func, arg)))
+ thread_id = *(objc_thread_t *)&new_thread_handle;
else
thread_id = NULL;
return thread_id;
}
-/* Set the current thread's priority. */
+/* Set the current thread's priority.
+ *
+ * Be aware that the default schedpolicy often disallows thread priorities.
+ */
int
__objc_thread_set_priority(int priority)
{
- /* Not implemented yet */
+ pthread_t thread_id = pthread_self();
+ int policy;
+ struct sched_param params;
+ int priority_min, priority_max;
+
+ if (pthread_getschedparam(thread_id, &policy, ¶ms) == 0)
+ {
+ if ((priority_max = sched_get_priority_max(policy)) != 0)
+ return -1;
+
+ if ((priority_min = sched_get_priority_min(policy)) != 0)
+ return -1;
+
+ if (priority > priority_max)
+ priority = priority_max;
+ else if (priority < priority_min)
+ priority = priority_min;
+ params.sched_priority = priority;
+
+ /*
+ * The solaris 7 and several other man pages incorrectly state that
+ * this should be a pointer to policy but pthread.h is universally
+ * at odds with this.
+ */
+ if (pthread_setschedparam(thread_id, policy, ¶ms) == 0)
+ return 0;
+ }
return -1;
}
int
__objc_thread_get_priority(void)
{
- /* Not implemented yet */
- return -1;
+ int policy;
+ struct sched_param params;
+
+ if (pthread_getschedparam(pthread_self(), &policy, ¶ms) == 0)
+ return params.sched_priority;
+ else
+ return -1;
}
/* Yield our process time to another thread. */
int
__objc_thread_set_data(void *value)
{
- return pthread_setspecific(_objc_thread_storage, value);
+ if (pthread_setspecific(_objc_thread_storage, value) == 0)
+ return 0;
+ else
+ return -1;
}
/* Returns the thread's local storage pointer. */
int
__objc_mutex_deallocate(objc_mutex_t mutex)
{
+ int count = 1;
+
+ /*
+ * Posix Threads specifically require that the thread be unlocked for
+ * pthread_mutex_destroy to work.
+ */
+
+ while (count)
+ {
+ if ((count = pthread_mutex_unlock((pthread_mutex_t*)mutex->backend)) < 0)
+ return -1;
+ }
+
if (pthread_mutex_destroy((pthread_mutex_t *)mutex->backend))
return -1;
int
__objc_mutex_lock(objc_mutex_t mutex)
{
- return pthread_mutex_lock((pthread_mutex_t *)mutex->backend);
+ if (pthread_mutex_lock((pthread_mutex_t *)mutex->backend) == 0)
+ return 0;
+ else
+ return -1;
}
/* Try to grab a lock on a mutex. */
int
__objc_mutex_trylock(objc_mutex_t mutex)
{
- return pthread_mutex_trylock((pthread_mutex_t *)mutex->backend);
+ if (pthread_mutex_trylock((pthread_mutex_t *)mutex->backend) == 0)
+ return 0;
+ else
+ return -1;
}
/* Unlock the mutex */
int
__objc_mutex_unlock(objc_mutex_t mutex)
{
- return pthread_mutex_unlock((pthread_mutex_t *)mutex->backend);
+ if (pthread_mutex_unlock((pthread_mutex_t *)mutex->backend) == 0)
+ return 0;
+ else
+ return -1;
}
/* Backend condition mutex functions */
int
__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
{
- return pthread_cond_wait((pthread_cond_t *)condition->backend,
- (pthread_mutex_t *)mutex->backend);
+ if (pthread_cond_wait((pthread_cond_t *)condition->backend,
+ (pthread_mutex_t *)mutex->backend) == 0)
+ return 0;
+ else
+ return -1;
}
/* Wake up all threads waiting on this condition. */
int
__objc_condition_broadcast(objc_condition_t condition)
{
- return pthread_cond_broadcast((pthread_cond_t *)condition->backend);
+ if (pthread_cond_broadcast((pthread_cond_t *)condition->backend) == 0)
+ return 0;
+ else
+ return -1;
}
/* Wake up one thread waiting on this condition. */
int
__objc_condition_signal(objc_condition_t condition)
{
- return pthread_cond_signal((pthread_cond_t *)condition->backend);
+ if (pthread_cond_signal((pthread_cond_t *)condition->backend) == 0)
+ return 0;
+ else
+ return -1;
}
-
-/* End of File */