From 0d2ca3e2c188604f0bfa6533f719ffebca8b5df4 Mon Sep 17 00:00:00 2001
From: Dwight <dwight@10gen.com>
Date: Wed, 6 Apr 2011 10:56:03 -0400
Subject: [PATCH] fix threading test

---
 db/common.cpp             | 2 ++
 dbtests/threadedtests.cpp | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/db/common.cpp b/db/common.cpp
index 44bc54d0ab0..178453cccda 100644
--- a/db/common.cpp
+++ b/db/common.cpp
@@ -27,6 +27,8 @@ namespace mongo {
     MongoMutex &dbMutex( *(new MongoMutex("rw:dbMutex")) );
 
     MongoMutex::MongoMutex(const char *name) : _m(name) {
+        static int n;
+        assert( ++n == 1 ); // below releasingWriteLock we assume MongoMutex is a singleton, and uses dbMutex ref above
         _remapPrivateViewRequested = false;
     }
 
diff --git a/dbtests/threadedtests.cpp b/dbtests/threadedtests.cpp
index 0cb04759a8c..4cda469ae59 100644
--- a/dbtests/threadedtests.cpp
+++ b/dbtests/threadedtests.cpp
@@ -73,7 +73,7 @@ namespace ThreadedTests {
         }
     private:
         virtual void setup() {
-            mm = new MongoMutex("MongoMutexTest");
+            mm = &dbMutex;
         }
         virtual void subthread(int) {
             Client::initThread("mongomutextest");