thread_cond.c

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/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include <nks/errno.h>
 
#include "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_strings.h"
#include "apr_arch_thread_mutex.h"
#include "apr_arch_thread_cond.h"
#include "apr_portable.h"
 
static apr_status_t thread_cond_cleanup(void *data)
{
    apr_thread_cond_t *cond = (apr_thread_cond_t *)data;
 
    NXCondFree(cond->cond);        
    return APR_SUCCESS;
} 
 
APR_DECLARE(apr_status_t) apr_thread_cond_create(apr_thread_cond_t **cond,
                                                 apr_pool_t *pool)
{
    apr_thread_cond_t *new_cond = NULL;
 
    new_cond = (apr_thread_cond_t *)apr_pcalloc(pool, sizeof(apr_thread_cond_t));
    
    if(new_cond ==NULL) {
        return APR_ENOMEM;
    }     
    new_cond->pool = pool;
 
    new_cond->cond = NXCondAlloc(NULL);
    
    if(new_cond->cond == NULL)
        return APR_ENOMEM;
 
    apr_pool_cleanup_register(new_cond->pool, new_cond, 
                                (void*)thread_cond_cleanup,
                                apr_pool_cleanup_null);
   *cond = new_cond;
    return APR_SUCCESS;
}
 
APR_DECLARE(apr_status_t) apr_thread_cond_wait(apr_thread_cond_t *cond,
                                               apr_thread_mutex_t *mutex)
{
    if (NXCondWait(cond->cond, mutex->mutex) != 0)
        return APR_EINTR;
    return APR_SUCCESS;
}
 
APR_DECLARE(apr_status_t) apr_thread_cond_timedwait(apr_thread_cond_t *cond,
                                                    apr_thread_mutex_t *mutex,
                                                    apr_interval_time_t timeout)
{
    int rc;
    if (timeout < 0) {
        rc = NXCondWait(cond->cond, mutex->mutex);
    }
    else {
        timeout = timeout * 1000 / NXGetSystemTick();
        rc = NXCondTimedWait(cond->cond, mutex->mutex, timeout);
        if (rc == NX_ETIMEDOUT) {
            return APR_TIMEUP;
        }
    }
    if (rc != 0) {
        return APR_EINTR;
    }
    return APR_SUCCESS;
}
 
APR_DECLARE(apr_status_t) apr_thread_cond_signal(apr_thread_cond_t *cond)
{
    NXCondSignal(cond->cond);
    return APR_SUCCESS;
}
 
APR_DECLARE(apr_status_t) apr_thread_cond_broadcast(apr_thread_cond_t *cond)
{
    NXCondBroadcast(cond->cond);
    return APR_SUCCESS;
}
 
APR_DECLARE(apr_status_t) apr_thread_cond_destroy(apr_thread_cond_t *cond)
{
    apr_status_t stat;
    if ((stat = thread_cond_cleanup(cond)) == APR_SUCCESS) {
        apr_pool_cleanup_kill(cond->pool, cond, thread_cond_cleanup);
        return APR_SUCCESS;
    }
    return stat;
}
 
APR_POOL_IMPLEMENT_ACCESSOR(thread_cond)