From b0a5cb0bb967c5b40adbbfa09bb1ceb5f8e72f57 Mon Sep 17 00:00:00 2001
From: Nick Kew <niq@apache.org>
Date: Tue, 7 Jun 2005 19:13:37 +0000
Subject: [PATCH] Add monitor hook (discussed under "watchdog" thread).

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@188846 13f79535-47bb-0310-9956-ffa450edef68
---
 include/mpm_common.h |  2 ++
 server/mpm_common.c  | 23 ++++++++++++++++-------
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/include/mpm_common.h b/include/mpm_common.h
index 1fdac30671..a36b926ff5 100644
--- a/include/mpm_common.h
+++ b/include/mpm_common.h
@@ -296,6 +296,8 @@ extern const char *ap_mpm_set_exception_hook(cmd_parms *cmd, void *dummy,
                                              const char *arg);
 #endif
 
+AP_DECLARE_HOOK(int,monitor,(apr_pool_t *p))
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/server/mpm_common.c b/server/mpm_common.c
index 2d502b47a6..e6bf91ffbe 100644
--- a/server/mpm_common.c
+++ b/server/mpm_common.c
@@ -59,6 +59,21 @@
 #include <unistd.h>
 #endif
 
+APR_HOOK_STRUCT(
+#if AP_ENABLE_EXCEPTION_HOOK
+    APR_HOOK_LINK(fatal_exception)
+#endif
+    APR_HOOK_LINK(monitor)
+)
+
+#if AP_ENABLE_EXCEPTION_HOOK
+AP_IMPLEMENT_HOOK_RUN_ALL(int, fatal_exception,
+                          (ap_exception_info_t *ei), (ei), OK, DECLINED)
+#endif
+AP_IMPLEMENT_HOOK_RUN_ALL(int, monitor,
+                          (apr_pool_t *p), (p), OK, DECLINED)
+
+
 #ifdef AP_MPM_WANT_RECLAIM_CHILD_PROCESSES
 
 typedef enum {DO_NOTHING, SEND_SIGTERM, SEND_SIGKILL, GIVEUP} action_t;
@@ -275,6 +290,7 @@ void ap_wait_or_timeout(apr_exit_why_e *status, int *exitcode, apr_proc_t *ret,
     ++wait_or_timeout_counter;
     if (wait_or_timeout_counter == INTERVAL_OF_WRITABLE_PROBES) {
         wait_or_timeout_counter = 0;
+        ap_run_monitor(p);
     }
 
     rv = apr_proc_wait_all_procs(ret, exitcode, status, APR_NOWAIT, p);
@@ -1028,13 +1044,6 @@ const char *ap_mpm_set_exception_hook(cmd_parms *cmd, void *dummy,
     return NULL;
 }
 
-APR_HOOK_STRUCT(
-    APR_HOOK_LINK(fatal_exception)
-)
-
-AP_IMPLEMENT_HOOK_RUN_ALL(int, fatal_exception,
-                          (ap_exception_info_t *ei), (ei), OK, DECLINED)
-
 static void run_fatal_exception_hook(int sig)
 {
     ap_exception_info_t ei = {0};
-- 
2.40.0