From: Paul Querna <pquerna@apache.org>
Date: Fri, 5 Dec 2008 09:14:14 +0000 (+0000)
Subject: Add a comment explaining the start mutex.
X-Git-Tag: 2.3.0~20
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d9370018b82dd7397488b10fca42f7eabd7f2d31;p=thirdparty%2Fapache%2Fhttpd.git

Add a comment explaining the start mutex.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@723675 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/modules/cluster/mod_heartmonitor.c b/modules/cluster/mod_heartmonitor.c
index 41cba183ab2..8097adc3714 100644
--- a/modules/cluster/mod_heartmonitor.c
+++ b/modules/cluster/mod_heartmonitor.c
@@ -392,6 +392,9 @@ static void start_hm_worker(apr_pool_t *p, hm_ctx_t *ctx)
         return;
     }
 
+    /* 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(ctx->start_mtx);
 
     apr_pool_cleanup_register(p, ctx, hm_pool_cleanup, apr_pool_cleanup_null);