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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 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/>.
*/
#ifndef PROC_MUTEX_H
#define PROC_MUTEX_H
#include "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_lib.h"
#include "apr_proc_mutex.h"
#include "apr_pools.h"
#include "apr_portable.h"
#include "apr_file_io.h"
#include "fileio.h"
/* System headers required by Locks library */
#if APR_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if APR_HAVE_STDIO_H
#include <stdio.h>
#endif
#if APR_HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_IPC_H
#include <sys/ipc.h>
#endif
#ifdef HAVE_SYS_SEM_H
#include <sys/sem.h>
#endif
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#if APR_HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#if APR_HAVE_PTHREAD_H
#include <pthread.h>
#endif
#if APR_HAVE_SEMAPHORE_H
#include <semaphore.h>
#endif
/* End System Headers */
struct apr_proc_mutex_unix_lock_methods_t {
unsigned int flags;
apr_status_t (*create)(apr_proc_mutex_t *, const char *);
apr_status_t (*acquire)(apr_proc_mutex_t *);
apr_status_t (*tryacquire)(apr_proc_mutex_t *);
apr_status_t (*release)(apr_proc_mutex_t *);
apr_status_t (*destroy)(apr_proc_mutex_t *);
apr_status_t (*child_init)(apr_proc_mutex_t **, apr_pool_t *, const char *);
const char *name;
};
typedef struct apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_lock_methods_t;
/* bit values for flags field in apr_unix_lock_methods_t */
#define APR_PROCESS_LOCK_MECH_IS_GLOBAL 1
#if APR_HAS_POSIXSEM_SERIALIZE
extern const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_posix_methods;
#endif
#if APR_HAS_SYSVSEM_SERIALIZE
extern const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_sysv_methods;
#endif
#if APR_HAS_FCNTL_SERIALIZE
extern const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_fcntl_methods;
#endif
#if APR_HAS_FLOCK_SERIALIZE
extern const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_flock_methods;
#endif
#if APR_HAS_PROC_PTHREAD_SERIALIZE
extern const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_proc_pthread_methods;
#endif
#if APR_HAS_RWLOCK_SERIALIZE
extern const apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_rwlock_methods;
#endif
#if !APR_HAVE_UNION_SEMUN && defined(APR_HAS_SYSVSEM_SERIALIZE)
union semun {
int val;
struct semid_ds *buf;
unsigned short *array;
};
#endif
struct apr_proc_mutex_t {
apr_pool_t *pool;
const apr_proc_mutex_unix_lock_methods_t *meth;
const apr_proc_mutex_unix_lock_methods_t *inter_meth;
int curr_locked;
char *fname;
#if APR_HAS_SYSVSEM_SERIALIZE || APR_HAS_FCNTL_SERIALIZE || APR_HAS_FLOCK_SERIALIZE
apr_file_t *interproc;
#endif
#if APR_HAS_PROC_PTHREAD_SERIALIZE
pthread_mutex_t *pthread_interproc;
#endif
#if APR_HAS_THREADS
/* APR doesn't have threads, no sense in having a thread lock mechanism.
*/
apr_os_thread_t owner;
int owner_ref;
#endif
};
void apr_proc_mutex_unix_setup_lock(void);
#endif /* PROC_MUTEX_H */
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