summaryrefslogtreecommitdiffstats
path: root/lib/libpthread/thread/thr_cond.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libpthread/thread/thr_cond.c')
-rw-r--r--lib/libpthread/thread/thr_cond.c334
1 files changed, 0 insertions, 334 deletions
diff --git a/lib/libpthread/thread/thr_cond.c b/lib/libpthread/thread/thr_cond.c
deleted file mode 100644
index 978ad04..0000000
--- a/lib/libpthread/thread/thr_cond.c
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by John Birrell.
- * 4. Neither the name of the author nor the names of any co-contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- */
-#include <stdlib.h>
-#include <errno.h>
-#ifdef _THREAD_SAFE
-#include <pthread.h>
-#include "pthread_private.h"
-
-int
-pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
-{
- enum pthread_cond_type type;
- pthread_cond_t pcond;
- int rval = 0;
-
- if (cond == NULL) {
- rval = EINVAL;
- } else {
- /*
- * Check if a pointer to a condition variable attribute
- * structure was passed by the caller:
- */
- if (cond_attr != NULL && *cond_attr != NULL) {
- /* Default to a fast condition variable: */
- type = (*cond_attr)->c_type;
- } else {
- /* Default to a fast condition variable: */
- type = COND_TYPE_FAST;
- }
-
- /* Process according to condition variable type: */
- switch (type) {
- /* Fast condition variable: */
- case COND_TYPE_FAST:
- /* Nothing to do here. */
- break;
-
- /* Trap invalid condition variable types: */
- default:
- /* Return an invalid argument error: */
- rval = EINVAL;
- break;
- }
-
- /* Check for no errors: */
- if (rval == 0) {
- if ((pcond = (pthread_cond_t)
- malloc(sizeof(struct pthread_cond))) == NULL) {
- rval = ENOMEM;
- } else {
- /*
- * Initialise the condition variable
- * structure:
- */
- _thread_queue_init(&pcond->c_queue);
- pcond->c_flags |= COND_FLAGS_INITED;
- pcond->c_type = type;
- *cond = pcond;
- }
- }
- }
- /* Return the completion status: */
- return (rval);
-}
-
-int
-pthread_cond_destroy(pthread_cond_t * cond)
-{
- int rval = 0;
-
- if (cond == NULL || *cond == NULL) {
- rval = EINVAL;
- } else {
- /* Process according to condition variable type: */
- switch ((*cond)->c_type) {
- /* Fast condition variable: */
- case COND_TYPE_FAST:
- /* Nothing to do here. */
- break;
-
- /* Trap invalid condition variable types: */
- default:
- /* Return an invalid argument error: */
- rval = EINVAL;
- break;
- }
-
- /* Check for errors: */
- if (rval == 0) {
- /* Destroy the contents of the condition structure: */
- _thread_queue_init(&(*cond)->c_queue);
- (*cond)->c_flags = 0;
- free(*cond);
- *cond = NULL;
- }
- }
- /* Return the completion status: */
- return (rval);
-}
-
-int
-pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex)
-{
- int rval = 0;
- int status;
-
- if (cond == NULL || *cond == NULL) {
- rval = EINVAL;
- } else {
- /* Block signals: */
- _thread_kern_sig_block(&status);
-
- /* Process according to condition variable type: */
- switch ((*cond)->c_type) {
- /* Fast condition variable: */
- case COND_TYPE_FAST:
- /*
- * Queue the running thread for the condition
- * variable:
- */
- _thread_queue_enq(&(*cond)->c_queue, _thread_run);
-
- /* Unlock the mutex: */
- pthread_mutex_unlock(mutex);
-
- /* Wait forever: */
- _thread_run->wakeup_time.tv_sec = -1;
-
- /* Schedule the next thread: */
- _thread_kern_sched_state(PS_COND_WAIT,
- __FILE__, __LINE__);
-
- /* Block signals: */
- _thread_kern_sig_block(NULL);
-
- /* Lock the mutex: */
- rval = pthread_mutex_lock(mutex);
- break;
-
- /* Trap invalid condition variable types: */
- default:
- /* Return an invalid argument error: */
- rval = EINVAL;
- break;
- }
-
- /* Unblock signals: */
- _thread_kern_sig_unblock(status);
- }
-
- /* Return the completion status: */
- return (rval);
-}
-
-int
-pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
- const struct timespec * abstime)
-{
- int rval = 0;
- int status;
-
- if (cond == NULL || *cond == NULL) {
- rval = EINVAL;
- } else {
- /* Block signals: */
- _thread_kern_sig_block(&status);
-
- /* Process according to condition variable type: */
- switch ((*cond)->c_type) {
- /* Fast condition variable: */
- case COND_TYPE_FAST:
- /* Set the wakeup time: */
- _thread_run->wakeup_time.tv_sec = abstime->tv_sec;
- _thread_run->wakeup_time.tv_nsec = abstime->tv_nsec;
-
- /* Reset the timeout flag: */
- _thread_run->timeout = 0;
-
- /*
- * Queue the running thread for the condition
- * variable:
- */
- _thread_queue_enq(&(*cond)->c_queue, _thread_run);
-
- /* Unlock the mutex: */
- if ((rval = pthread_mutex_unlock(mutex)) != 0) {
- /*
- * Cannot unlock the mutex, so remove the
- * running thread from the condition
- * variable queue:
- */
- _thread_queue_deq(&(*cond)->c_queue);
- } else {
- /* Schedule the next thread: */
- _thread_kern_sched_state(PS_COND_WAIT,
- __FILE__, __LINE__);
-
- /* Block signals: */
- _thread_kern_sig_block(NULL);
-
- /* Lock the mutex: */
- if ((rval = pthread_mutex_lock(mutex)) != 0) {
- }
- /* Check if the wait timed out: */
- else if (_thread_run->timeout) {
- /* Return a timeout error: */
- rval = ETIMEDOUT;
- }
- }
- break;
-
- /* Trap invalid condition variable types: */
- default:
- /* Return an invalid argument error: */
- rval = EINVAL;
- break;
- }
-
- /* Unblock signals: */
- _thread_kern_sig_unblock(status);
- }
-
- /* Return the completion status: */
- return (rval);
-}
-
-int
-pthread_cond_signal(pthread_cond_t * cond)
-{
- int rval = 0;
- int status;
- pthread_t pthread;
-
- if (cond == NULL || *cond == NULL) {
- rval = EINVAL;
- } else {
- /* Block signals: */
- _thread_kern_sig_block(&status);
-
- /* Process according to condition variable type: */
- switch ((*cond)->c_type) {
- /* Fast condition variable: */
- case COND_TYPE_FAST:
- /* Bring the next thread off the condition queue: */
- if ((pthread = _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
- /* Allow the thread to run: */
- PTHREAD_NEW_STATE(pthread,PS_RUNNING);
- }
- break;
-
- /* Trap invalid condition variable types: */
- default:
- /* Return an invalid argument error: */
- rval = EINVAL;
- break;
- }
-
- /* Unblock signals: */
- _thread_kern_sig_unblock(status);
- }
-
- /* Return the completion status: */
- return (rval);
-}
-
-int
-pthread_cond_broadcast(pthread_cond_t * cond)
-{
- int rval = 0;
- int status;
- pthread_t pthread;
-
- /* Block signals: */
- _thread_kern_sig_block(&status);
-
- /* Process according to condition variable type: */
- switch ((*cond)->c_type) {
- /* Fast condition variable: */
- case COND_TYPE_FAST:
- /*
- * Enter a loop to bring all threads off the
- * condition queue:
- */
- while ((pthread =
- _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
- /* Allow the thread to run: */
- PTHREAD_NEW_STATE(pthread,PS_RUNNING);
- }
- break;
-
- /* Trap invalid condition variable types: */
- default:
- /* Return an invalid argument error: */
- rval = EINVAL;
- break;
- }
-
- /* Unblock signals: */
- _thread_kern_sig_unblock(status);
-
- /* Return the completion status: */
- return (rval);
-}
-#endif
OpenPOWER on IntegriCloud