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-rw-r--r--locks/unix/locks.c284
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diff --git a/locks/unix/locks.c b/locks/unix/locks.c
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-/* ====================================================================
- * Copyright (c) 1999 The Apache Group. 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 acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" 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 names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``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 GROUP 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 Group.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
-#include "apr_general.h"
-#include "apr_portable.h"
-#include "locks.h"
-#include <string.h>
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_create_lock(ap_context_t *, ap_locktype_e, char *,
- * ap_lock_t **)
- * Create a new instance of a lock structure.
- * arg 1) The context to operate on.
- * arg 2) The type of lock to create, one of:
- * APR_CROSS_PROCESS -- lock processes from the protected area.
- * APR_INTRAPROCESS -- lock threads from the protected area.
- * APR_LOCKALL -- lock processes and threads from the
- * protected area.
- * arg 3) A file name to use if the lock mechanism requires one. This
- * argument should always be provided. The lock code itself will
- * determine if it should be used.
- * arg 4) The newly created lock structure.
- * NOTE: APR_CROSS_PROCESS may lock both processes and threads, but it is
- * only garaunteed to lock processes.
- */
-ap_status_t ap_create_lock(ap_context_t *cont, ap_locktype_e type, char *fname, struct lock_t **lock)
-{
- struct lock_t *new;
- ap_status_t stat;
-
- new = (struct lock_t *)ap_palloc(cont, sizeof(struct lock_t));
-
- new->cntxt = cont;
- new->type = type;
- new->fname = strdup(fname);
-
- if (type != APR_CROSS_PROCESS) {
- if ((stat = create_intra_lock(new)) != APR_SUCCESS) {
- return stat;
- }
- }
- if (type != APR_INTRAPROCESS) {
- if ((stat = create_inter_lock(new)) != APR_SUCCESS) {
- return stat;
- }
- }
- *lock = new;
- return APR_SUCCESS;
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_lock(ap_lock_t *)
- * Lock a protected region.
- * arg 1) The lock to set.
- */
-ap_status_t ap_lock(struct lock_t *lock)
-{
- ap_status_t stat;
- if (lock->type != APR_CROSS_PROCESS) {
- if ((stat = lock_intra(lock)) != APR_SUCCESS) {
- return stat;
- }
- }
- if (lock->type != APR_INTRAPROCESS) {
- if ((stat = lock_inter(lock)) != APR_SUCCESS) {
- return stat;
- }
- }
- return APR_SUCCESS;
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_unlock(ap_lock_t *)
- * Unlock a protected region.
- * arg 1) The lock to reset.
- */
-ap_status_t ap_unlock(struct lock_t *lock)
-{
- ap_status_t stat;
-
- if (lock->type != APR_CROSS_PROCESS) {
- if ((stat = unlock_intra(lock)) != APR_SUCCESS) {
- return stat;
- }
- }
- if (lock->type != APR_INTRAPROCESS) {
- if ((stat = unlock_inter(lock)) != APR_SUCCESS) {
- return stat;
- }
- }
- return APR_SUCCESS;
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_destroy_lock(ap_lock_t *)
- * Free the memory associated with a lock.
- * arg 1) The lock to free.
- * NOTE: If the lock is currently active when it is destroyed, it
- * will be unlocked first.
- */
-ap_status_t ap_destroy_lock(struct lock_t *lock)
-{
- ap_status_t stat;
- if (lock->type != APR_CROSS_PROCESS) {
- if ((stat = destroy_intra_lock(lock)) != APR_SUCCESS) {
- return stat;
- }
- }
- if (lock->type != APR_INTRAPROCESS) {
- if ((stat = destroy_inter_lock(lock)) != APR_SUCCESS) {
- return stat;
- }
- }
- return APR_SUCCESS;
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_child_init_lock(ap_context_t *, char *, ap_lock_t **)
- * Re-open a lock in a child process.
- * arg 1) The context to operate on.
- * arg 2) A file name to use if the lock mechanism requires one. This
- * argument should always be provided. The lock code itself will
- * determine if it should be used. This filename should be the same
- * one that was passed to ap_create_lock
- * arg 1) The newly re-opened lock structure.
- * NOTE: This function doesn't always do something, it depends on the
- * locking mechanism chosen for the platform, but it is a good
- * idea to call it regardless, because it makes the code more
- * portable.
- */
-ap_status_t ap_child_init_lock(ap_context_t *cont, char *fname, struct lock_t **lock)
-{
- ap_status_t stat;
- if ((*lock)->type != APR_CROSS_PROCESS) {
- if ((stat = child_init_lock(cont, fname, lock)) != APR_SUCCESS) {
- return stat;
- }
- }
- return APR_SUCCESS;
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_get_lockdata(ap_lock_t *, void *)
- * Return the context associated with the current lock.
- * arg 1) The currently open lock.
- * arg 2) The user data associated with the lock.
- */
-ap_status_t ap_get_lockdata(struct lock_t *lock, void *data)
-{
- if (lock != NULL) {
- return ap_get_userdata(lock->cntxt, &data);
- }
- else {
- data = NULL;
- return APR_ENOLOCK;
- }
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_set_lockdata(ap_lock_t *, void *)
- * Return the context associated with the current lock.
- * arg 1) The currently open lock.
- * arg 2) The user data to associate with the lock.
- */
-ap_status_t ap_set_lockdata(struct lock_t *lock, void *data)
-{
- if (lock != NULL) {
- return ap_set_userdata(lock->cntxt, data);
- }
- else {
- data = NULL;
- return APR_ENOLOCK;
- }
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_get_os_lock(ap_lock_t **, ap_os_lock_t *)
- * onvert the lock from os specific type to apr type
- * arg 1) The apr lock to convert.
- * arg 2) The os specific lock we are converting to.
- */
-ap_status_t ap_get_os_lock(struct lock_t *lock, ap_os_lock_t *oslock)
-{
- if (lock == NULL) {
- return APR_ENOLOCK;
- }
- oslock->crossproc = lock->interproc;
-#if defined (USE_SYSVSEM_SERIALIZE)
- oslock->op_on = lock->op_on;
- oslock->op_off = lock->op_off;
-#elif defined (USE_FCNTL_SERIALIZE)
- oslock->lock_it = lock->lock_it;
- oslock->unlock_it = lock->unlock_it;
-#endif
-#if defined (USE_PTHREAD_SERIALIZE)
- oslock->intraproc = lock->intraproc;
-#endif
-
- return APR_SUCCESS;
-}
-
-/* ***APRDOC********************************************************
- * ap_status_t ap_put_os_lock(ap_context_t *, ap_lock_t **, ap_os_lock_t *)
- * onvert the lock from os specific type to apr type
- * arg 1) The context to use if it is needed.
- * arg 2) The apr lock we are converting to.
- * arg 3) The os specific lock to convert.
- */
-ap_status_t ap_put_os_lock(ap_context_t *cont, struct lock_t **lock,
- ap_os_lock_t *thelock)
-{
- if (cont == NULL) {
- return APR_ENOCONT;
- }
- if ((*lock) == NULL) {
- (*lock) = (struct lock_t *)ap_palloc(cont, sizeof(struct lock_t));
- (*lock)->cntxt = cont;
- }
- (*lock)->interproc = thelock->crossproc;
-#if defined (USE_SYSVSEM_SERIALIZE)
- (*lock)->op_on = thelock->op_on;
- (*lock)->op_off = thelock->op_off;
-#elif defined (USE_FCNTL_SERIALIZE)
- (*lock)->lock_it = thelock->lock_it;
- (*lock)->unlock_it = thelock->unlock_it;
-#endif
-#if defined (USE_PTHREAD_SERIALIZE)
- (*lock)->intraproc = thelock->intraproc;
-#endif
- return APR_SUCCESS;
-}
-
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