From a80cb81604ba4aea6373e3de7cb47be0d72b0b6c Mon Sep 17 00:00:00 2001
From: Maxim Dounin <mdounin@mdounin.ru>
Date: Fri, 31 May 2013 14:59:26 +0400
Subject: [PATCH] Win32: accept_mutex now always disabled (ticket #362).

Use of accept mutex on win32 may result in a deadlock if there are multiple
worker_processes configured and the mutex is grabbed by a process which
can't accept connections.
---
 src/event/ngx_event.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/event/ngx_event.c b/src/event/ngx_event.c
index b7205f45b..c4c61204b 100644
--- a/src/event/ngx_event.c
+++ b/src/event/ngx_event.c
@@ -607,6 +607,17 @@ ngx_event_process_init(ngx_cycle_t *cycle)
         ngx_use_accept_mutex = 0;
     }
 
+#if (NGX_WIN32)
+
+    /*
+     * disable accept mutex on win32 as it may cause deadlock if
+     * grabbed by a process which can't accept connections
+     */
+
+    ngx_use_accept_mutex = 0;
+
+#endif
+
 #if (NGX_THREADS)
     ngx_posted_events_mutex = ngx_mutex_init(cycle->log, 0);
     if (ngx_posted_events_mutex == NULL) {