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📄 ap_config.h (6,606 bytes)	6.45 KB	0644	✍️ ⬇️ 🗑️
📄 ap_config_auto.h (10,142 bytes)	9.9 KB	0644	✍️ ⬇️ 🗑️
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📄 ap_expr.h (14,076 bytes)	13.75 KB	0644	✍️ ⬇️ 🗑️
📄 ap_hooks.h (5,988 bytes)	5.85 KB	0644	✍️ ⬇️ 🗑️
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📄 ap_regex.h (11,405 bytes)	11.14 KB	0644	✍️ ⬇️ 🗑️
📄 ap_regkey.h (9,183 bytes)	8.97 KB	0644	✍️ ⬇️ 🗑️
📄 ap_release.h (3,144 bytes)	3.07 KB	0644	✍️ ⬇️ 🗑️
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📄 ap_socache.h (9,400 bytes)	9.18 KB	0644	✍️ ⬇️ 🗑️
📄 apache_noprobes.h (15,968 bytes)	15.59 KB	0644	✍️ ⬇️ 🗑️
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📄 heartbeat.h (1,595 bytes)	1.56 KB	0644	✍️ ⬇️ 🗑️
📄 http_config.h (57,718 bytes)	56.37 KB	0644	✍️ ⬇️ 🗑️
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📄 http_log.h (36,871 bytes)	36.01 KB	0644	✍️ ⬇️ 🗑️
📄 http_main.h (3,245 bytes)	3.17 KB	0644	✍️ ⬇️ 🗑️
📄 http_protocol.h (42,399 bytes)	41.41 KB	0644	✍️ ⬇️ 🗑️
📄 http_request.h (26,335 bytes)	25.72 KB	0644	✍️ ⬇️ 🗑️
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📄 httpd.h (99,526 bytes)	97.19 KB	0644	✍️ ⬇️ 🗑️
📄 mod_auth.h (4,523 bytes)	4.42 KB	0644	✍️ ⬇️ 🗑️
📄 mod_cache.h (7,256 bytes)	7.09 KB	0644	✍️ ⬇️ 🗑️
📄 mod_cgi.h (2,496 bytes)	2.44 KB	0644	✍️ ⬇️ 🗑️
📄 mod_core.h (3,406 bytes)	3.33 KB	0644	✍️ ⬇️ 🗑️
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📄 mod_dbd.h (4,154 bytes)	4.06 KB	0644	✍️ ⬇️ 🗑️
📄 mod_http2.h (4,696 bytes)	4.59 KB	0644	✍️ ⬇️ 🗑️
📄 mod_include.h (3,984 bytes)	3.89 KB	0644	✍️ ⬇️ 🗑️
📄 mod_log_config.h (2,485 bytes)	2.43 KB	0644	✍️ ⬇️ 🗑️
📄 mod_proxy.h (67,375 bytes)	65.8 KB	0644	✍️ ⬇️ 🗑️
📄 mod_request.h (1,628 bytes)	1.59 KB	0644	✍️ ⬇️ 🗑️
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📄 mod_session.h (6,768 bytes)	6.61 KB	0644	✍️ ⬇️ 🗑️
📄 mod_so.h (1,226 bytes)	1.2 KB	0644	✍️ ⬇️ 🗑️
📄 mod_ssl.h (4,989 bytes)	4.87 KB	0644	✍️ ⬇️ 🗑️
📄 mod_ssl_openssl.h (4,911 bytes)	4.8 KB	0644	✍️ ⬇️ 🗑️
📄 mod_status.h (2,441 bytes)	2.38 KB	0644	✍️ ⬇️ 🗑️
📄 mod_unixd.h (1,114 bytes)	1.09 KB	0644	✍️ ⬇️ 🗑️
📄 mod_watchdog.h (7,518 bytes)	7.34 KB	0644	✍️ ⬇️ 🗑️
📄 mod_xml2enc.h (2,307 bytes)	2.25 KB	0644	✍️ ⬇️ 🗑️
📄 mpm_common.h (17,499 bytes)	17.09 KB	0644	✍️ ⬇️ 🗑️
📄 os.h (1,670 bytes)	1.63 KB	0644	✍️ ⬇️ 🗑️
📄 scoreboard.h (10,178 bytes)	9.94 KB	0644	✍️ ⬇️ 🗑️
📄 unixd.h (4,236 bytes)	4.14 KB	0644	✍️ ⬇️ 🗑️
📄 util_cfgtree.h (3,153 bytes)	3.08 KB	0644	✍️ ⬇️ 🗑️
📄 util_charset.h (2,267 bytes)	2.21 KB	0644	✍️ ⬇️ 🗑️
📄 util_cookies.h (4,961 bytes)	4.84 KB	0644	✍️ ⬇️ 🗑️
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📄 util_script.h (9,860 bytes)	9.63 KB	0644	✍️ ⬇️ 🗑️
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✍️ Editing: mod_watchdog.h

            File: /usr/include/apache2/mod_watchdog.h

            Size: 7.34 KB | 
            Last Modified: 2026-05-05 17:22:06        

/* 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 */
/** @} */

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✍️ Editing: mod_watchdog.h

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