From 967856b8f844223b509f90a973121517e7c45c34 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);
 }
 
 /*
-- 
cgit v0.12


From e8d057ad672b4675495c308059b951afaa3ce020 Mon Sep 17 00:00:00 2001
From: Joe Mistachkin <joe@mistachkin.com>
Date: Wed, 27 May 2015 22:29:25 +0000
Subject: Make sure the master and mutex locks are in a well-known state across
 the fork() call.

---
 unix/tclUnixNotfy.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/unix/tclUnixNotfy.c b/unix/tclUnixNotfy.c
index 9186f33..2941331 100644
--- a/unix/tclUnixNotfy.c
+++ b/unix/tclUnixNotfy.c
@@ -1335,6 +1335,8 @@ static void
 AtForkPrepare(void)
 {
     Tcl_MutexLock(&notifierMutex);
+    TclpMasterLock();
+    TclpMutexLock();
 }
 
 /*
@@ -1356,6 +1358,8 @@ AtForkPrepare(void)
 static void
 AtForkParent(void)
 {
+    TclpMutexLock();
+    TclpMasterLock();
     Tcl_MutexUnlock(&notifierMutex);
 }
 
@@ -1378,6 +1382,8 @@ AtForkParent(void)
 static void
 AtForkChild(void)
 {
+    TclpMutexLock();
+    TclpMasterLock();
     Tcl_MutexUnlockAndFinalize(&notifierMutex);
     Tcl_InitNotifier();
 }
-- 
cgit v0.12


From d249a8af5d7eaaed1b6e7251a696ce0c68f3a86c Mon Sep 17 00:00:00 2001
From: Joe Mistachkin <joe@mistachkin.com>
Date: Wed, 27 May 2015 22:34:53 +0000
Subject: Fix typo in previous check-in.

---
 unix/tclUnixNotfy.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/unix/tclUnixNotfy.c b/unix/tclUnixNotfy.c
index 2941331..219dd75 100644
--- a/unix/tclUnixNotfy.c
+++ b/unix/tclUnixNotfy.c
@@ -1358,8 +1358,8 @@ AtForkPrepare(void)
 static void
 AtForkParent(void)
 {
-    TclpMutexLock();
-    TclpMasterLock();
+    TclpMutexUnlock();
+    TclpMasterUnlock();
     Tcl_MutexUnlock(&notifierMutex);
 }
 
@@ -1382,8 +1382,8 @@ AtForkParent(void)
 static void
 AtForkChild(void)
 {
-    TclpMutexLock();
-    TclpMasterLock();
+    TclpMutexUnlock();
+    TclpMasterUnlock();
     Tcl_MutexUnlockAndFinalize(&notifierMutex);
     Tcl_InitNotifier();
 }
-- 
cgit v0.12