From 067dafca0bf3ee80f5e1c9b998d40e6ea468cfa3 Mon Sep 17 00:00:00 2001
From: Joe Mistachkin <joe@mistachkin.com>
Date: Thu, 21 May 2015 17:58:49 +0000
Subject: Additional mutex locking/unlocking during fork() to keep things
 synchronized.

---
 unix/tclUnixNotfy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/unix/tclUnixNotfy.c b/unix/tclUnixNotfy.c
index aa32915..9186f33 100644
--- a/unix/tclUnixNotfy.c
+++ b/unix/tclUnixNotfy.c
@@ -1334,6 +1334,7 @@ NotifierThreadProc(
 static void
 AtForkPrepare(void)
 {
+    Tcl_MutexLock(&notifierMutex);
 }
 
 /*
@@ -1355,6 +1356,7 @@ AtForkPrepare(void)
 static void
 AtForkParent(void)
 {
+    Tcl_MutexUnlock(&notifierMutex);
 }
 
 /*
-- 
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