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authorobrien <obrien@FreeBSD.org>2000-03-27 03:00:05 +0000
committerobrien <obrien@FreeBSD.org>2000-03-27 03:00:05 +0000
commit4044c01127d0ad5c7333ef4b1429a67c8d0cdc3b (patch)
treea1f2c4c47e8e2c43a83ae4b26946eb4a8d4f14b9 /contrib/libobjc/thr-posix.c
parent922a45e8c80d9c15acdba0eee3d03681cc7cb8d6 (diff)
downloadFreeBSD-src-4044c01127d0ad5c7333ef4b1429a67c8d0cdc3b.zip
FreeBSD-src-4044c01127d0ad5c7333ef4b1429a67c8d0cdc3b.tar.gz
Virgin import of GCC 2.95.1's libobjc.
(previous GCC/EGCS versions had these files in gcc/objc/)
Diffstat (limited to 'contrib/libobjc/thr-posix.c')
-rw-r--r--contrib/libobjc/thr-posix.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/contrib/libobjc/thr-posix.c b/contrib/libobjc/thr-posix.c
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--- /dev/null
+++ b/contrib/libobjc/thr-posix.c
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+/* GNU Objective C Runtime Thread Interface for POSIX compliant threads
+ 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)
+
+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 <pthread.h>
+
+/* Key structure for maintaining thread specific storage */
+static pthread_key_t _objc_thread_storage;
+
+/* Backend initialization functions */
+
+/* Initialize the threads subsystem. */
+int
+__objc_init_thread_system(void)
+{
+ /* Initialize the thread storage key */
+ return pthread_key_create(&_objc_thread_storage, NULL);
+}
+
+/* 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;
+ pthread_t new_thread_handle;
+
+ if ( !(pthread_create(&new_thread_handle, NULL, (void *)func, arg)) )
+ thread_id = *(objc_thread_t *)&new_thread_handle;
+ else
+ thread_id = NULL;
+
+ return thread_id;
+}
+
+/* Set the current thread's priority. */
+int
+__objc_thread_set_priority(int priority)
+{
+ /* Not implemented yet */
+ return -1;
+}
+
+/* Return the current thread's priority. */
+int
+__objc_thread_get_priority(void)
+{
+ /* Not implemented yet */
+ return -1;
+}
+
+/* Yield our process time to another thread. */
+void
+__objc_thread_yield(void)
+{
+ sched_yield();
+}
+
+/* Terminate the current thread. */
+int
+__objc_thread_exit(void)
+{
+ /* exit the thread */
+ pthread_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)
+{
+ pthread_t self = pthread_self();
+
+ return *(objc_thread_t *)&self;
+}
+
+/* Sets the thread's local storage pointer. */
+int
+__objc_thread_set_data(void *value)
+{
+ return pthread_setspecific(_objc_thread_storage, value);
+}
+
+/* Returns the thread's local storage pointer. */
+void *
+__objc_thread_get_data(void)
+{
+ return pthread_getspecific(_objc_thread_storage);
+}
+
+/* Backend mutex functions */
+
+/* Allocate a mutex. */
+int
+__objc_mutex_allocate(objc_mutex_t mutex)
+{
+ mutex->backend = objc_malloc(sizeof(pthread_mutex_t));
+
+ if (pthread_mutex_init((pthread_mutex_t *)mutex->backend, NULL))
+ {
+ objc_free(mutex->backend);
+ mutex->backend = NULL;
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Deallocate a mutex. */
+int
+__objc_mutex_deallocate(objc_mutex_t mutex)
+{
+ if (pthread_mutex_destroy((pthread_mutex_t *)mutex->backend))
+ return -1;
+
+ objc_free(mutex->backend);
+ mutex->backend = NULL;
+ return 0;
+}
+
+/* Grab a lock on a mutex. */
+int
+__objc_mutex_lock(objc_mutex_t mutex)
+{
+ return pthread_mutex_lock((pthread_mutex_t *)mutex->backend);
+}
+
+/* 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);
+}
+
+/* Unlock the mutex */
+int
+__objc_mutex_unlock(objc_mutex_t mutex)
+{
+ return pthread_mutex_unlock((pthread_mutex_t *)mutex->backend);
+}
+
+/* Backend condition mutex functions */
+
+/* Allocate a condition. */
+int
+__objc_condition_allocate(objc_condition_t condition)
+{
+ condition->backend = objc_malloc(sizeof(pthread_cond_t));
+
+ if (pthread_cond_init((pthread_cond_t *)condition->backend, NULL))
+ {
+ objc_free(condition->backend);
+ condition->backend = NULL;
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Deallocate a condition. */
+int
+__objc_condition_deallocate(objc_condition_t condition)
+{
+ if (pthread_cond_destroy((pthread_cond_t *)condition->backend))
+ return -1;
+
+ objc_free(condition->backend);
+ condition->backend = NULL;
+ return 0;
+}
+
+/* Wait on the condition */
+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);
+}
+
+/* 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);
+}
+
+/* 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);
+}
+
+/* End of File */
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