From 25d3bf68ab7856859d6ce2e81bf30062030d01d7 Mon Sep 17 00:00:00 2001
From: Hartmut Birr <osexpert@googlemail.com>
Date: Thu, 25 Aug 2005 12:33:37 +0000
Subject: [PATCH] Fixed a bug in RtlLeaveCriticalSection. We have only to
 signal the event if someone waits on it.

svn path=/trunk/; revision=17538
---
 reactos/lib/ntdll/rtl/critical.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/reactos/lib/ntdll/rtl/critical.c b/reactos/lib/ntdll/rtl/critical.c
index a7b34c40374..60b5de0af20 100644
--- a/reactos/lib/ntdll/rtl/critical.c
+++ b/reactos/lib/ntdll/rtl/critical.c
@@ -329,10 +329,11 @@ RtlLeaveCriticalSection(
         CriticalSection->OwningThread = 0;
 
         /* Was someone wanting us? This needs to be done atomically. */
-        InterlockedDecrement(&CriticalSection->LockCount);
+        if (-1 != InterlockedDecrement(&CriticalSection->LockCount)) {
 
-        /* Let him have us */
-        RtlpUnWaitCriticalSection(CriticalSection);
+            /* Let him have us */
+            RtlpUnWaitCriticalSection(CriticalSection);
+        }
     }
 
     /* Sucessful! */