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00001 /* Licensed to the Apache Software Foundation (ASF) under one or more 00002 * contributor license agreements. See the NOTICE file distributed with 00003 * this work for additional information regarding copyright ownership. 00004 * The ASF licenses this file to You under the Apache License, Version 2.0 00005 * (the "License"); you may not use this file except in compliance with 00006 * the License. You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #ifndef PROC_MUTEX_H 00018 #define PROC_MUTEX_H 00019 00020 #include "apr.h" 00021 #include "apr_private.h" 00022 #include "apr_general.h" 00023 #include "apr_lib.h" 00024 #include "apr_proc_mutex.h" 00025 #include "apr_pools.h" 00026 #include "apr_portable.h" 00027 #include "apr_file_io.h" 00028 #include "apr_arch_file_io.h" 00029 00030 /* System headers required by Locks library */ 00031 #if APR_HAVE_SYS_TYPES_H 00032 #include <sys/types.h> 00033 #endif 00034 #if APR_HAVE_STDIO_H 00035 #include <stdio.h> 00036 #endif 00037 #if APR_HAVE_FCNTL_H 00038 #include <fcntl.h> 00039 #endif 00040 00041 #ifdef HAVE_SYS_IPC_H 00042 #include <sys/ipc.h> 00043 #endif 00044 #ifdef HAVE_SYS_SEM_H 00045 #include <sys/sem.h> 00046 #endif 00047 #ifdef HAVE_SYS_FILE_H 00048 #include <sys/file.h> 00049 #endif 00050 #if APR_HAVE_STDLIB_H 00051 #include <stdlib.h> 00052 #endif 00053 #if APR_HAVE_UNISTD_H 00054 #include <unistd.h> 00055 #endif 00056 #if APR_HAVE_STRING_H 00057 #include <string.h> 00058 #endif 00059 #ifdef HAVE_SYS_MMAN_H 00060 #include <sys/mman.h> 00061 #endif 00062 #if APR_HAVE_PTHREAD_H 00063 #include <pthread.h> 00064 #endif 00065 #if APR_HAVE_SEMAPHORE_H 00066 #include <semaphore.h> 00067 #endif 00068 /* End System Headers */ 00069 00070 struct apr_proc_mutex_unix_lock_methods_t { 00071 unsigned int flags; 00072 apr_status_t (*create)(apr_proc_mutex_t *, const char *); 00073 apr_status_t (*acquire)(apr_proc_mutex_t *); 00074 apr_status_t (*tryacquire)(apr_proc_mutex_t *); 00075 apr_status_t (*release)(apr_proc_mutex_t *); 00076 apr_status_t (*cleanup)(void *); 00077 apr_status_t (*child_init)(apr_proc_mutex_t **, apr_pool_t *, const char *); 00078 const char *name; 00079 }; 00080 typedef struct apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_lock_methods_t; 00081 00082 /* bit values for flags field in apr_unix_lock_methods_t */ 00083 #define APR_PROCESS_LOCK_MECH_IS_GLOBAL 1 00084 00085 #if !APR_HAVE_UNION_SEMUN && defined(APR_HAS_SYSVSEM_SERIALIZE) 00086 union semun { 00087 int val; 00088 struct semid_ds *buf; 00089 unsigned short *array; 00090 }; 00091 #endif 00092 00093 struct apr_proc_mutex_t { 00094 apr_pool_t *pool; 00095 const apr_proc_mutex_unix_lock_methods_t *meth; 00096 const apr_proc_mutex_unix_lock_methods_t *inter_meth; 00097 int curr_locked; 00098 char *fname; 00099 #if APR_HAS_SYSVSEM_SERIALIZE || APR_HAS_FCNTL_SERIALIZE || APR_HAS_FLOCK_SERIALIZE 00100 apr_file_t *interproc; 00101 #endif 00102 #if APR_HAS_POSIXSEM_SERIALIZE 00103 sem_t *psem_interproc; 00104 #endif 00105 #if APR_HAS_PROC_PTHREAD_SERIALIZE 00106 pthread_mutex_t *pthread_interproc; 00107 #endif 00108 }; 00109 00110 void apr_proc_mutex_unix_setup_lock(void); 00111 00112 #endif /* PROC_MUTEX_H */ 00113