From 3bf21bf3b6491749da20679afc9d59f89a9bb38c Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 19 Nov 2004 20:05:14 +0000
Subject: [PATCH] Added _lockCount>0 check to lock,unlock and trylock to make
 sure that it is set properly on first time entry.

---
 src/osgDB/ReentrantMutex.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/osgDB/ReentrantMutex.cpp b/src/osgDB/ReentrantMutex.cpp
index e4a89b39a..c4e051d99 100644
--- a/src/osgDB/ReentrantMutex.cpp
+++ b/src/osgDB/ReentrantMutex.cpp
@@ -28,7 +28,7 @@ ReentrantMutex::~ReentrantMutex()
 
 int ReentrantMutex::lock()
 {
-    if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread())
+    if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread() && _lockCount>0)
     {
         ++_lockCount;
         return 0;
@@ -47,7 +47,7 @@ int ReentrantMutex::lock()
 
 int ReentrantMutex::unlock()
 {
-    if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread())
+    if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread() && _lockCount>0)
     {
         --_lockCount;
         if (_lockCount<=0) return Mutex::unlock();
@@ -57,7 +57,7 @@ int ReentrantMutex::unlock()
 
 int ReentrantMutex::trylock()
 {
-    if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread())
+    if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread() && _lockCount>0)
     {
         ++_lockCount;
         return 0;