/usr/include/apache2/mod_watchdog.h is in apache2-dev 2.4.29-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | /* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MOD_WATCHDOG_H
#define MOD_WATCHDOG_H
/**
* @file mod_watchdog.h
* @brief Watchdog module for Apache
*
* @defgroup MOD_WATCHDOG mod_watchdog
* @ingroup APACHE_MODS
* @{
*/
#include "httpd.h"
#include "http_config.h"
#include "http_log.h"
#include "ap_provider.h"
#include "apr.h"
#include "apr_strings.h"
#include "apr_pools.h"
#include "apr_shm.h"
#include "apr_hash.h"
#include "apr_hooks.h"
#include "apr_optional.h"
#include "apr_file_io.h"
#include "apr_time.h"
#include "apr_thread_proc.h"
#include "apr_global_mutex.h"
#include "apr_thread_mutex.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Default singleton watchdog instance name.
* Singleton watchdog is protected by mutex and
* guaranteed to be run inside a single child process
* at any time.
*/
#define AP_WATCHDOG_SINGLETON "_singleton_"
/**
* Default watchdog instance name
*/
#define AP_WATCHDOG_DEFAULT "_default_"
/**
* Default Watchdog interval
*/
#define AP_WD_TM_INTERVAL APR_TIME_C(1000000) /* 1 second */
/**
* Watchdog thread timer resolution
*/
#define AP_WD_TM_SLICE APR_TIME_C(100000) /* 100 ms */
/* State values for callback */
#define AP_WATCHDOG_STATE_STARTING 1
#define AP_WATCHDOG_STATE_RUNNING 2
#define AP_WATCHDOG_STATE_STOPPING 3
typedef struct ap_watchdog_t ap_watchdog_t;
/* Create a set of AP_WD_DECLARE(type), AP_WD_DECLARE_NONSTD(type) and
* AP_WD_DECLARE_DATA with appropriate export and import tags for the platform
*/
#if !defined(AP_WD_DECLARE)
#if !defined(WIN32)
#define AP_WD_DECLARE(type) type
#define AP_WD_DECLARE_NONSTD(type) type
#define AP_WD_DECLARE_DATA
#elif defined(AP_WD_DECLARE_STATIC)
#define AP_WD_DECLARE(type) type __stdcall
#define AP_WD_DECLARE_NONSTD(type) type
#define AP_WD_DECLARE_DATA
#elif defined(AP_WD_DECLARE_EXPORT)
#define AP_WD_DECLARE(type) __declspec(dllexport) type __stdcall
#define AP_WD_DECLARE_NONSTD(type) __declspec(dllexport) type
#define AP_WD_DECLARE_DATA __declspec(dllexport)
#else
#define AP_WD_DECLARE(type) __declspec(dllimport) type __stdcall
#define AP_WD_DECLARE_NONSTD(type) __declspec(dllimport) type
#define AP_WD_DECLARE_DATA __declspec(dllimport)
#endif
#endif
/**
* Callback function used for watchdog.
* @param state Watchdog state function. See @p AP_WATCHDOG_STATE_ .
* @param data is what was passed to @p ap_watchdog_register_callback function.
* @param pool Temporary callback pool destroyed after the call.
* @return APR_SUCCESS to continue calling this callback.
*/
typedef apr_status_t ap_watchdog_callback_fn_t(int state, void *data,
apr_pool_t *pool);
/**
* Get watchdog instance.
* @param watchdog Storage for watchdog instance.
* @param name Watchdog name.
* @param parent Non-zero to get the parent process watchdog instance.
* @param singleton Non-zero to get the singleton watchdog instance.
* @param p The pool to use.
* @return APR_SUCCESS if all went well
* @remark Use @p AP_WATCHDOG_DEFAULT to get default watchdog instance.
* If separate watchdog thread is needed provide unique name
* and function will create a new watchdog instance.
* Note that default client process watchdog works in singleton mode.
*/
APR_DECLARE_OPTIONAL_FN(apr_status_t, ap_watchdog_get_instance,
(ap_watchdog_t **watchdog, const char *name, int parent,
int singleton, apr_pool_t *p));
/**
* Register watchdog callback.
* @param watchdog Watchdog to use
* @param interval Interval on which the callback function will execute.
* @param callback The function to call on watchdog event.
* @param data The data to pass to the callback function.
* @return APR_SUCCESS if all went well. APR_EEXIST if already registered.
*/
APR_DECLARE_OPTIONAL_FN(apr_status_t, ap_watchdog_register_callback,
(ap_watchdog_t *watchdog, apr_interval_time_t interval,
const void *data, ap_watchdog_callback_fn_t *callback));
/**
* Update registered watchdog callback interval.
* @param w Watchdog to use
* @param interval New interval on which the callback function will execute.
* @param callback The function to call on watchdog event.
* @param data The data to pass to the callback function.
* @return APR_SUCCESS if all went well. APR_EOF if callback was not found.
*/
APR_DECLARE_OPTIONAL_FN(apr_status_t, ap_watchdog_set_callback_interval,
(ap_watchdog_t *w, apr_interval_time_t interval,
const void *data, ap_watchdog_callback_fn_t *callback));
/**
* Watchdog require hook.
* @param s The server record
* @param name Watchdog name.
* @param parent Non-zero to indicate the parent process watchdog mode.
* @param singleton Non-zero to indicate the singleton watchdog mode.
* @return OK to enable notifications from this watchdog, DECLINED otherwise.
* @remark This is called in post config phase for all watchdog instances
* that have no callbacks registered. Modules using this hook
* should ensure that their post_config hook is called after watchdog
* post_config.
*/
APR_DECLARE_EXTERNAL_HOOK(ap, AP_WD, int, watchdog_need, (server_rec *s,
const char *name,
int parent, int singleton))
/**
* Watchdog initialize hook.
* It is called after the watchdog thread is initialized.
* @param s The server record
* @param name Watchdog name.
* @param pool The pool used to create the watchdog.
*/
APR_DECLARE_EXTERNAL_HOOK(ap, AP_WD, int, watchdog_init, (
server_rec *s,
const char *name,
apr_pool_t *pool))
/**
* Watchdog terminate hook.
* It is called when the watchdog thread is terminated.
* @param s The server record
* @param name Watchdog name.
* @param pool The pool used to create the watchdog.
*/
APR_DECLARE_EXTERNAL_HOOK(ap, AP_WD, int, watchdog_exit, (
server_rec *s,
const char *name,
apr_pool_t *pool))
/**
* Fixed interval watchdog hook.
* It is called regularly on @p AP_WD_TM_INTERVAL interval.
* @param s The server record
* @param name Watchdog name.
* @param pool Temporary pool destroyed after the call.
*/
APR_DECLARE_EXTERNAL_HOOK(ap, AP_WD, int, watchdog_step, (
server_rec *s,
const char *name,
apr_pool_t *pool))
#ifdef __cplusplus
}
#endif
#endif /* MOD_WATCHDOG_H */
/** @} */
|