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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 "apr_general.h"
#include "apr_strings.h"
#include "locks.h"
#include "apr_portable.h"
apr_status_t apr_create_lock(apr_lock_t **lock, apr_locktype_e type,
apr_lockscope_e scope, const char *fname,
apr_pool_t *cont)
{
apr_lock_t *newlock;
SECURITY_ATTRIBUTES sec;
newlock = (apr_lock_t *)apr_palloc(cont, sizeof(apr_lock_t));
newlock->cntxt = cont;
/* ToDo: How to handle the case when no context is available?
* How to cleanup the storage properly?
*/
newlock->fname = apr_pstrdup(cont, fname);
newlock->type = type;
newlock->scope = scope;
sec.nLength = sizeof(SECURITY_ATTRIBUTES);
sec.lpSecurityDescriptor = NULL;
if (scope == APR_CROSS_PROCESS || scope == APR_LOCKALL) {
sec.bInheritHandle = TRUE;
}
else {
sec.bInheritHandle = FALSE;
}
if (scope == APR_INTRAPROCESS) {
InitializeCriticalSection(&newlock->section);
} else {
newlock->mutex = CreateMutex(&sec, FALSE, fname);
}
*lock = newlock;
return APR_SUCCESS;
}
apr_status_t apr_child_init_lock(apr_lock_t **lock, const char *fname,
apr_pool_t *cont)
{
/* This routine should not be called (and OpenMutex will fail if called)
* on a INTRAPROCESS lock
*/
(*lock) = (apr_lock_t *)apr_palloc(cont, sizeof(apr_lock_t));
if ((*lock) == NULL) {
return APR_ENOMEM;
}
(*lock)->fname = apr_pstrdup(cont, fname);
(*lock)->mutex = OpenMutex(MUTEX_ALL_ACCESS, TRUE, fname);
if ((*lock)->mutex == NULL) {
return GetLastError();
}
return APR_SUCCESS;
}
apr_status_t apr_lock(apr_lock_t *lock)
{
DWORD rv;
if (lock->scope == APR_INTRAPROCESS) {
EnterCriticalSection(&lock->section);
return APR_SUCCESS;
} else {
rv = WaitForSingleObject(lock->mutex, INFINITE);
if (rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
return APR_SUCCESS;
}
}
return GetLastError();
}
apr_status_t apr_unlock(apr_lock_t *lock)
{
if (lock->scope == APR_INTRAPROCESS) {
LeaveCriticalSection(&lock->section);
return APR_SUCCESS;
} else {
if (ReleaseMutex(lock->mutex) == 0) {
return GetLastError();
}
}
return APR_SUCCESS;
}
apr_status_t apr_destroy_lock(apr_lock_t *lock)
{
if (lock->scope == APR_INTRAPROCESS) {
DeleteCriticalSection(&lock->section);
return APR_SUCCESS;
} else {
if (CloseHandle(lock->mutex) == 0) {
return GetLastError();
}
}
return APR_SUCCESS;
}
apr_status_t apr_get_lockdata(apr_lock_t *lock, const char *key, void *data)
{
return apr_get_userdata(data, key, lock->cntxt);
}
apr_status_t apr_set_lockdata(apr_lock_t *lock, void *data, const char *key,
apr_status_t (*cleanup) (void *))
{
return apr_set_userdata(data, key, cleanup, lock->cntxt);
}
apr_status_t apr_get_os_lock(apr_os_lock_t *thelock, apr_lock_t *lock)
{
*thelock = lock->mutex;
return APR_SUCCESS;
}
apr_status_t apr_put_os_lock(apr_lock_t **lock, apr_os_lock_t *thelock,
apr_pool_t *cont)
{
if (cont == NULL) {
return APR_ENOPOOL;
}
if ((*lock) == NULL) {
(*lock) = (apr_lock_t *)apr_palloc(cont, sizeof(apr_lock_t));
(*lock)->cntxt = cont;
}
(*lock)->mutex = *thelock;
return APR_SUCCESS;
}
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