Copyright (C) 1996, 1997 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.
-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. */
+along with GCC; see the file COPYING. If not, write to
+the Free Software Foundation, 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
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 "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. */
* pthread_mutex_destroy to work.
*/
- while ( count )
+ while (count)
{
- if (( count = pthread_mutex_unlock((pthread_mutex_t *)mutex->backend))
- < 0 )
+ if ((count = pthread_mutex_unlock((pthread_mutex_t*)mutex->backend)) < 0)
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 */