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-rw-r--r--modules/core/mod_watchdog.c725
1 files changed, 725 insertions, 0 deletions
diff --git a/modules/core/mod_watchdog.c b/modules/core/mod_watchdog.c
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+++ b/modules/core/mod_watchdog.c
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+/* 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.
+ */
+
+/* Watchdog module.
+ */
+
+#include "apr.h"
+#include "mod_watchdog.h"
+#include "ap_provider.h"
+#include "ap_mpm.h"
+#include "http_core.h"
+#include "util_mutex.h"
+
+#define AP_WATCHDOG_PGROUP "watchdog"
+#define AP_WATCHDOG_PVERSION "parent"
+#define AP_WATCHDOG_CVERSION "child"
+
+typedef struct watchdog_list_t watchdog_list_t;
+
+struct watchdog_list_t
+{
+ struct watchdog_list_t *next;
+ ap_watchdog_t *wd;
+ apr_status_t status;
+ apr_interval_time_t interval;
+ apr_interval_time_t step;
+ const void *data;
+ ap_watchdog_callback_fn_t *callback_fn;
+};
+
+struct ap_watchdog_t
+{
+ apr_thread_mutex_t *startup;
+ apr_proc_mutex_t *mutex;
+ const char *name;
+ watchdog_list_t *callbacks;
+ int is_running;
+ int singleton;
+ int active;
+ apr_interval_time_t step;
+ apr_thread_t *thread;
+ apr_pool_t *pool;
+};
+
+typedef struct wd_server_conf_t wd_server_conf_t;
+struct wd_server_conf_t
+{
+ int child_workers;
+ int parent_workers;
+ apr_pool_t *pool;
+ server_rec *s;
+};
+
+static wd_server_conf_t *wd_server_conf = NULL;
+static apr_interval_time_t wd_interval = AP_WD_TM_INTERVAL;
+static int mpm_is_forked = AP_MPMQ_NOT_SUPPORTED;
+static const char *wd_proc_mutex_type = "watchdog-callback";
+
+static apr_status_t wd_worker_cleanup(void *data)
+{
+ apr_status_t rv;
+ ap_watchdog_t *w = (ap_watchdog_t *)data;
+
+ if (w->is_running) {
+ watchdog_list_t *wl = w->callbacks;
+ while (wl) {
+ if (wl->status == APR_SUCCESS) {
+ /* Execute watchdog callback with STOPPING state */
+ (*wl->callback_fn)(AP_WATCHDOG_STATE_STOPPING,
+ (void *)wl->data, w->pool);
+ wl->status = APR_EOF;
+ }
+ wl = wl->next;
+ }
+ }
+ w->is_running = 0;
+ apr_thread_join(&rv, w->thread);
+ return rv;
+}
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* Main watchdog worker thread. */
+/* For singleton workers child thread that first obtains the process */
+/* mutex is running. Threads in other child's are locked on mutex. */
+/* */
+/*--------------------------------------------------------------------------*/
+static void* APR_THREAD_FUNC wd_worker(apr_thread_t *thread, void *data)
+{
+ ap_watchdog_t *w = (ap_watchdog_t *)data;
+ apr_status_t rv;
+ int locked = 0;
+ int probed = 0;
+ int inited = 0;
+ int mpmq_s = 0;
+
+ w->pool = apr_thread_pool_get(thread);
+ w->is_running = 1;
+
+ apr_thread_mutex_unlock(w->startup);
+ if (w->mutex) {
+ while (w->is_running) {
+ if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpmq_s) != APR_SUCCESS) {
+ w->is_running = 0;
+ break;
+ }
+ if (mpmq_s == AP_MPMQ_STOPPING) {
+ w->is_running = 0;
+ break;
+ }
+ rv = apr_proc_mutex_trylock(w->mutex);
+ if (rv == APR_SUCCESS) {
+ if (probed) {
+ /* Sleep after we were locked
+ * up to 1 second. Httpd can be
+ * in the middle of shutdown, and
+ * our child didn't yet received
+ * the shutdown signal.
+ */
+ probed = 10;
+ while (w->is_running && probed > 0) {
+ apr_sleep(AP_WD_TM_INTERVAL);
+ probed--;
+ if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpmq_s) != APR_SUCCESS) {
+ w->is_running = 0;
+ break;
+ }
+ if (mpmq_s == AP_MPMQ_STOPPING) {
+ w->is_running = 0;
+ break;
+ }
+ }
+ }
+ locked = 1;
+ break;
+ }
+ probed = 1;
+ apr_sleep(AP_WD_TM_SLICE);
+ }
+ }
+ if (w->is_running) {
+ watchdog_list_t *wl = w->callbacks;
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wd_server_conf->s,
+ APLOGNO(02972) "%sWatchdog (%s) running",
+ w->singleton ? "Singleton " : "", w->name);
+ apr_time_clock_hires(w->pool);
+ if (wl) {
+ apr_pool_t *ctx = NULL;
+ apr_pool_create(&ctx, w->pool);
+ while (wl && w->is_running) {
+ /* Execute watchdog callback */
+ wl->status = (*wl->callback_fn)(AP_WATCHDOG_STATE_STARTING,
+ (void *)wl->data, ctx);
+ wl = wl->next;
+ }
+ apr_pool_destroy(ctx);
+ }
+ else {
+ ap_run_watchdog_init(wd_server_conf->s, w->name, w->pool);
+ inited = 1;
+ }
+ }
+
+ /* Main execution loop */
+ while (w->is_running) {
+ apr_pool_t *ctx = NULL;
+ apr_time_t curr;
+ watchdog_list_t *wl = w->callbacks;
+
+ apr_sleep(AP_WD_TM_SLICE);
+ if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpmq_s) != APR_SUCCESS) {
+ w->is_running = 0;
+ }
+ if (mpmq_s == AP_MPMQ_STOPPING) {
+ w->is_running = 0;
+ }
+ if (!w->is_running) {
+ break;
+ }
+ curr = apr_time_now() - AP_WD_TM_SLICE;
+ while (wl && w->is_running) {
+ if (wl->status == APR_SUCCESS) {
+ wl->step += (apr_time_now() - curr);
+ if (wl->step >= wl->interval) {
+ if (!ctx)
+ apr_pool_create(&ctx, w->pool);
+ wl->step = 0;
+ /* Execute watchdog callback */
+ wl->status = (*wl->callback_fn)(AP_WATCHDOG_STATE_RUNNING,
+ (void *)wl->data, ctx);
+ if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpmq_s) != APR_SUCCESS) {
+ w->is_running = 0;
+ }
+ if (mpmq_s == AP_MPMQ_STOPPING) {
+ w->is_running = 0;
+ }
+ }
+ }
+ wl = wl->next;
+ }
+ if (w->is_running && w->callbacks == NULL) {
+ /* This is hook mode watchdog
+ * running on WatchogInterval
+ */
+ w->step += (apr_time_now() - curr);
+ if (w->step >= wd_interval) {
+ if (!ctx)
+ apr_pool_create(&ctx, w->pool);
+ w->step = 0;
+ /* Run watchdog step hook */
+ ap_run_watchdog_step(wd_server_conf->s, w->name, ctx);
+ }
+ }
+ if (ctx)
+ apr_pool_destroy(ctx);
+ if (!w->is_running) {
+ break;
+ }
+ }
+ if (inited) {
+ /* Run the watchdog exit hooks.
+ * If this was singleton watchdog the init hook
+ * might never been called, so skip the exit hook
+ * in that case as well.
+ */
+ ap_run_watchdog_exit(wd_server_conf->s, w->name, w->pool);
+ }
+ else {
+ watchdog_list_t *wl = w->callbacks;
+ while (wl) {
+ if (wl->status == APR_SUCCESS) {
+ /* Execute watchdog callback with STOPPING state */
+ (*wl->callback_fn)(AP_WATCHDOG_STATE_STOPPING,
+ (void *)wl->data, w->pool);
+ }
+ wl = wl->next;
+ }
+ }
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wd_server_conf->s,
+ APLOGNO(02973) "%sWatchdog (%s) stopping",
+ w->singleton ? "Singleton " : "", w->name);
+
+ if (locked)
+ apr_proc_mutex_unlock(w->mutex);
+ apr_thread_exit(w->thread, APR_SUCCESS);
+
+ return NULL;
+}
+
+static apr_status_t wd_startup(ap_watchdog_t *w, apr_pool_t *p)
+{
+ apr_status_t rc;
+
+ /* Create thread startup mutex */
+ rc = apr_thread_mutex_create(&w->startup, APR_THREAD_MUTEX_UNNESTED, p);
+ if (rc != APR_SUCCESS)
+ return rc;
+
+ if (w->singleton) {
+ /* Initialize singleton mutex in child */
+ rc = apr_proc_mutex_child_init(&w->mutex,
+ apr_proc_mutex_lockfile(w->mutex), p);
+ if (rc != APR_SUCCESS)
+ return rc;
+ }
+
+ /* This mutex fixes problems with a fast start/fast end, where the pool
+ * cleanup was being invoked before the thread completely spawned.
+ */
+ apr_thread_mutex_lock(w->startup);
+ apr_pool_pre_cleanup_register(p, w, wd_worker_cleanup);
+
+ /* Start the newly created watchdog */
+ rc = apr_thread_create(&w->thread, NULL, wd_worker, w, p);
+ if (rc) {
+ apr_pool_cleanup_kill(p, w, wd_worker_cleanup);
+ }
+
+ apr_thread_mutex_lock(w->startup);
+ apr_thread_mutex_unlock(w->startup);
+ apr_thread_mutex_destroy(w->startup);
+
+ return rc;
+}
+
+static apr_status_t ap_watchdog_get_instance(ap_watchdog_t **watchdog,
+ const char *name,
+ int parent,
+ int singleton,
+ apr_pool_t *p)
+{
+ ap_watchdog_t *w;
+ const char *pver = parent ? AP_WATCHDOG_PVERSION : AP_WATCHDOG_CVERSION;
+
+ if (parent && mpm_is_forked != AP_MPMQ_NOT_SUPPORTED) {
+ /* Parent threads are not supported for
+ * forked mpm's
+ */
+ *watchdog = NULL;
+ return APR_ENOTIMPL;
+ }
+ w = ap_lookup_provider(AP_WATCHDOG_PGROUP, name, pver);
+ if (w) {
+ *watchdog = w;
+ return APR_SUCCESS;
+ }
+ w = apr_pcalloc(p, sizeof(ap_watchdog_t));
+ w->name = name;
+ w->pool = p;
+ w->singleton = parent ? 0 : singleton;
+ *watchdog = w;
+ return ap_register_provider(p, AP_WATCHDOG_PGROUP, name,
+ pver, *watchdog);
+}
+
+static 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_list_t *c = w->callbacks;
+ apr_status_t rv = APR_EOF;
+
+ while (c) {
+ if (c->data == data && c->callback_fn == callback) {
+ /* We have existing callback.
+ * Update the interval and reset status, so the
+ * callback and continue execution if stopped earlier.
+ */
+ c->interval = interval;
+ c->step = 0;
+ c->status = APR_SUCCESS;
+ rv = APR_SUCCESS;
+ break;
+ }
+ c = c->next;
+ }
+ return rv;
+}
+
+static apr_status_t ap_watchdog_register_callback(ap_watchdog_t *w,
+ apr_interval_time_t interval,
+ const void *data,
+ ap_watchdog_callback_fn_t *callback)
+{
+ watchdog_list_t *c = w->callbacks;
+
+ while (c) {
+ if (c->data == data && c->callback_fn == callback) {
+ /* We have already registered callback.
+ * Do not allow callbacks that have the same
+ * function and data pointers.
+ */
+ return APR_EEXIST;
+ }
+ c = c->next;
+ }
+ c = apr_palloc(w->pool, sizeof(watchdog_list_t));
+ c->data = data;
+ c->callback_fn = callback;
+ c->interval = interval;
+ c->step = 0;
+ c->status = APR_EINIT;
+
+ c->wd = w;
+ c->next = w->callbacks;
+ w->callbacks = c;
+ w->active++;
+
+ return APR_SUCCESS;
+}
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* Pre config hook. */
+/* Create default watchdogs for parent and child */
+/* Parent watchdog executes inside parent process so it doesn't need the */
+/* singleton mutex */
+/* */
+/*--------------------------------------------------------------------------*/
+static int wd_pre_config_hook(apr_pool_t *pconf, apr_pool_t *plog,
+ apr_pool_t *ptemp)
+{
+ apr_status_t rv;
+ ap_watchdog_t *w;
+
+ ap_mpm_query(AP_MPMQ_IS_FORKED, &mpm_is_forked);
+ if ((rv = ap_watchdog_get_instance(&w,
+ AP_WATCHDOG_SINGLETON, 0, 1, pconf)) != APR_SUCCESS) {
+ return rv;
+ }
+ if ((rv = ap_watchdog_get_instance(&w,
+ AP_WATCHDOG_DEFAULT, 0, 0, pconf)) != APR_SUCCESS) {
+ return rv;
+ }
+ if (mpm_is_forked == AP_MPMQ_NOT_SUPPORTED) {
+ /* Create parent process watchdog for
+ * non forked mpm's only.
+ */
+ if ((rv = ap_watchdog_get_instance(&w,
+ AP_WATCHDOG_DEFAULT, 1, 0, pconf)) != APR_SUCCESS) {
+ return rv;
+ }
+ }
+
+ if ((rv = ap_mutex_register(pconf, wd_proc_mutex_type, NULL,
+ APR_LOCK_DEFAULT, 0)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ return OK;
+}
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* Post config hook. */
+/* Create watchdog thread in parent and initializes Watchdog module */
+/* */
+/*--------------------------------------------------------------------------*/
+static int wd_post_config_hook(apr_pool_t *pconf, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s)
+{
+ apr_status_t rv;
+ const char *pk = "watchdog_init_module_tag";
+ apr_pool_t *ppconf = pconf;
+ const apr_array_header_t *wl;
+
+ if (ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_PRE_CONFIG)
+ /* First time config phase -- skip. */
+ return OK;
+
+ apr_pool_userdata_get((void *)&wd_server_conf, pk, ppconf);
+ if (!wd_server_conf) {
+ if (!(wd_server_conf = apr_pcalloc(ppconf, sizeof(wd_server_conf_t))))
+ return APR_ENOMEM;
+ apr_pool_create(&wd_server_conf->pool, ppconf);
+ apr_pool_userdata_set(wd_server_conf, pk, apr_pool_cleanup_null, ppconf);
+ }
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(010033)
+ "Watchdog: Running with WatchdogInterval %"
+ APR_TIME_T_FMT "ms", apr_time_as_msec(wd_interval));
+ wd_server_conf->s = s;
+ if ((wl = ap_list_provider_names(pconf, AP_WATCHDOG_PGROUP,
+ AP_WATCHDOG_PVERSION))) {
+ const ap_list_provider_names_t *wn;
+ int i;
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02974)
+ "Watchdog: found parent providers.");
+
+ wn = (ap_list_provider_names_t *)wl->elts;
+ for (i = 0; i < wl->nelts; i++) {
+ ap_watchdog_t *w = ap_lookup_provider(AP_WATCHDOG_PGROUP,
+ wn[i].provider_name,
+ AP_WATCHDOG_PVERSION);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02975)
+ "Watchdog: Looking for parent (%s).", wn[i].provider_name);
+ if (w) {
+ if (!w->active) {
+ int status = ap_run_watchdog_need(s, w->name, 1,
+ w->singleton);
+ if (status == OK) {
+ /* One of the modules returned OK to this watchog.
+ * Mark it as active
+ */
+ w->active = 1;
+ }
+ }
+ if (w->active) {
+ /* We have active watchdog.
+ * Create the watchdog thread
+ */
+ if ((rv = wd_startup(w, wd_server_conf->pool)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(01571)
+ "Watchdog: Failed to create parent worker thread.");
+ return rv;
+ }
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, s, APLOGNO(02976)
+ "Watchdog: Created parent worker thread (%s).", w->name);
+ wd_server_conf->parent_workers++;
+ }
+ }
+ }
+ }
+ if (wd_server_conf->parent_workers) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01572)
+ "Spawned %d parent worker threads.",
+ wd_server_conf->parent_workers);
+ }
+ if ((wl = ap_list_provider_names(pconf, AP_WATCHDOG_PGROUP,
+ AP_WATCHDOG_CVERSION))) {
+ const ap_list_provider_names_t *wn;
+ int i;
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02977)
+ "Watchdog: found child providers.");
+
+ wn = (ap_list_provider_names_t *)wl->elts;
+ for (i = 0; i < wl->nelts; i++) {
+ ap_watchdog_t *w = ap_lookup_provider(AP_WATCHDOG_PGROUP,
+ wn[i].provider_name,
+ AP_WATCHDOG_CVERSION);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02978)
+ "Watchdog: Looking for child (%s).", wn[i].provider_name);
+ if (w) {
+ if (!w->active) {
+ int status = ap_run_watchdog_need(s, w->name, 0,
+ w->singleton);
+ if (status == OK) {
+ /* One of the modules returned OK to this watchog.
+ * Mark it as active
+ */
+ w->active = 1;
+ }
+ }
+ if (w->active) {
+ /* We have some callbacks registered.
+ * Create mutexes for singleton watchdogs
+ */
+ if (w->singleton) {
+ rv = ap_proc_mutex_create(&w->mutex, NULL, wd_proc_mutex_type,
+ w->name, s,
+ wd_server_conf->pool, 0);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(10095)
+ "Watchdog: Failed to create singleton mutex.");
+ return rv;
+ }
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, s, APLOGNO(02979)
+ "Watchdog: Created singleton mutex (%s).", w->name);
+ }
+ wd_server_conf->child_workers++;
+ }
+ }
+ }
+ }
+ return OK;
+}
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* Child init hook. */
+/* Create watchdog threads and initializes Mutexes in child */
+/* */
+/*--------------------------------------------------------------------------*/
+static void wd_child_init_hook(apr_pool_t *p, server_rec *s)
+{
+ apr_status_t rv = OK;
+ const apr_array_header_t *wl;
+
+ if (!wd_server_conf->child_workers) {
+ /* We don't have anything configured, bail out.
+ */
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, s, APLOGNO(02980)
+ "Watchdog: nothing configured?");
+ return;
+ }
+ if ((wl = ap_list_provider_names(p, AP_WATCHDOG_PGROUP,
+ AP_WATCHDOG_CVERSION))) {
+ const ap_list_provider_names_t *wn;
+ int i;
+ wn = (ap_list_provider_names_t *)wl->elts;
+ for (i = 0; i < wl->nelts; i++) {
+ ap_watchdog_t *w = ap_lookup_provider(AP_WATCHDOG_PGROUP,
+ wn[i].provider_name,
+ AP_WATCHDOG_CVERSION);
+ if (w && w->active) {
+ /* We have some callbacks registered.
+ * Kick of the watchdog
+ */
+ if ((rv = wd_startup(w, wd_server_conf->pool)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(01573)
+ "Watchdog: Failed to create child worker thread.");
+ /* No point to continue */
+ return;
+ }
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, s, APLOGNO(02981)
+ "Watchdog: Created child worker thread (%s).", wn[i].provider_name);
+ }
+ }
+ }
+}
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* WatchdogInterval directive */
+/* */
+/*--------------------------------------------------------------------------*/
+static const char *wd_cmd_watchdog_int(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ apr_status_t rv;
+ const char *errs = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+ if (errs != NULL)
+ return errs;
+ rv = ap_timeout_parameter_parse(arg, &wd_interval, "s");
+
+ if (rv != APR_SUCCESS)
+ return "Unparse-able WatchdogInterval setting";
+ if (wd_interval < AP_WD_TM_SLICE) {
+ return apr_psprintf(cmd->pool, "Invalid WatchdogInterval: minimal value %"
+ APR_TIME_T_FMT "ms", apr_time_as_msec(AP_WD_TM_SLICE));
+ }
+
+ return NULL;
+}
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* List of directives specific to our module. */
+/* */
+/*--------------------------------------------------------------------------*/
+static const command_rec wd_directives[] =
+{
+ AP_INIT_TAKE1(
+ "WatchdogInterval", /* directive name */
+ wd_cmd_watchdog_int, /* config action routine */
+ NULL, /* argument to include in call */
+ RSRC_CONF, /* where available */
+ "Watchdog interval in seconds"
+ ),
+ {NULL}
+};
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* Which functions are responsible for which hooks in the server. */
+/* */
+/*--------------------------------------------------------------------------*/
+static void wd_register_hooks(apr_pool_t *p)
+{
+
+ /* Only the mpm_winnt has child init hook handler.
+ * Make sure that we are called after the mpm child init handler
+ * initializes.
+ */
+ static const char *const after_mpm[] = { "mpm_winnt.c", NULL};
+
+ /* Pre config handling
+ */
+ ap_hook_pre_config(wd_pre_config_hook,
+ NULL,
+ NULL,
+ APR_HOOK_FIRST);
+
+ /* Post config handling
+ */
+ ap_hook_post_config(wd_post_config_hook,
+ NULL,
+ NULL,
+ APR_HOOK_LAST);
+
+ /* Child init hook
+ */
+ ap_hook_child_init(wd_child_init_hook,
+ after_mpm,
+ NULL,
+ APR_HOOK_MIDDLE);
+
+ APR_REGISTER_OPTIONAL_FN(ap_watchdog_get_instance);
+ APR_REGISTER_OPTIONAL_FN(ap_watchdog_register_callback);
+ APR_REGISTER_OPTIONAL_FN(ap_watchdog_set_callback_interval);
+}
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* The list of callback routines and data structures that provide */
+/* the static hooks into our module from the other parts of the server. */
+/* */
+/*--------------------------------------------------------------------------*/
+AP_DECLARE_MODULE(watchdog) = {
+ STANDARD20_MODULE_STUFF,
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ wd_directives, /* command apr_table_t */
+ wd_register_hooks /* register hooks */
+};
+
+/*--------------------------------------------------------------------------*/
+/* */
+/* The list of optional hooks that we provide */
+/* */
+/*--------------------------------------------------------------------------*/
+APR_HOOK_STRUCT(
+ APR_HOOK_LINK(watchdog_need)
+ APR_HOOK_LINK(watchdog_init)
+ APR_HOOK_LINK(watchdog_exit)
+ APR_HOOK_LINK(watchdog_step)
+)
+
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(ap, AP_WD, int, watchdog_need,
+ (server_rec *s, const char *name,
+ int parent, int singleton),
+ (s, name, parent, singleton),
+ DECLINED)
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(ap, AP_WD, int, watchdog_init,
+ (server_rec *s, const char *name,
+ apr_pool_t *pool),
+ (s, name, pool),
+ OK, DECLINED)
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(ap, AP_WD, int, watchdog_exit,
+ (server_rec *s, const char *name,
+ apr_pool_t *pool),
+ (s, name, pool),
+ OK, DECLINED)
+APR_IMPLEMENT_EXTERNAL_HOOK_RUN_ALL(ap, AP_WD, int, watchdog_step,
+ (server_rec *s, const char *name,
+ apr_pool_t *pool),
+ (s, name, pool),
+ OK, DECLINED)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 05:18:03 +0000