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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#include "locks.h"
apr_status_t lock_intra_cleanup(void *data)
{
apr_lock_t *lock = (apr_lock_t *)data;
if (lock->curr_locked == 1) {
if (atomic_add(&lock->ben_intraproc , -1) > 1){
release_sem (lock->sem_intraproc);
} else {
return errno;
}
}
delete_sem(lock->sem_intraproc);
return APR_SUCCESS;
}
apr_status_t create_intra_lock(apr_lock_t *new)
{
int32 stat;
new->sem_intraproc = (sem_id)apr_palloc(new->cntxt, sizeof(sem_id));
new->ben_intraproc = (int32)apr_palloc(new->cntxt, sizeof(int32));
if ((stat = create_sem(0, "ap_intraproc")) < B_NO_ERROR){
lock_intra_cleanup(new);
return stat;
}
new->ben_intraproc = 0;
new->sem_intraproc = stat;
new->curr_locked = 0;
apr_register_cleanup(new->cntxt, (void *)new, lock_intra_cleanup,
apr_null_cleanup);
return APR_SUCCESS;
}
apr_status_t lock_intra(apr_lock_t *lock)
{
int32 stat;
if (atomic_add (&lock->ben_intraproc, 1) > 0){
if ((stat = acquire_sem(lock->sem_intraproc)) != B_NO_ERROR){
atomic_add(&lock->ben_intraproc,-1);
return stat;
}
}
lock->curr_locked = 1;
return APR_SUCCESS;
}
apr_status_t unlock_intra(apr_lock_t *lock)
{
int32 stat;
if (atomic_add(&lock->ben_intraproc, -1) > 1){
if ((stat = release_sem(lock->sem_intraproc)) != B_NO_ERROR) {
atomic_add(&lock->ben_intraproc, 1);
return stat;
}
}
lock->curr_locked = 0;
return APR_SUCCESS;
}
apr_status_t destroy_intra_lock(apr_lock_t *lock)
{
apr_status_t stat;
if ((stat = lock_intra_cleanup(lock)) == APR_SUCCESS) {
apr_kill_cleanup(lock->cntxt, lock, lock_intra_cleanup);
return APR_SUCCESS;
}
return stat;
}
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