From 4fd3866e25f4e3cdb674b6351a58222587d6fdc3 Mon Sep 17 00:00:00 2001
From: Jeff Hill <johill@lanl.gov>
Date: Fri, 19 Apr 2002 17:57:15 +0000
Subject: [PATCH] installed

---
 .../cxxTemplates/epicsSingletonMutex.cpp      | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/libCom/cxxTemplates/epicsSingletonMutex.cpp

diff --git a/src/libCom/cxxTemplates/epicsSingletonMutex.cpp b/src/libCom/cxxTemplates/epicsSingletonMutex.cpp
new file mode 100644
index 000000000..51bbdb5a9
--- /dev/null
+++ b/src/libCom/cxxTemplates/epicsSingletonMutex.cpp
@@ -0,0 +1,49 @@
+
+/*
+ *  $Id$
+ *
+ *  Author: Jeff O. Hill
+ *
+ */
+
+#define epicsExportSharedSymbols
+#include "epicsSingleton.h"
+
+class epicsShareClass epicsSingletonMutex {
+public: 
+    epicsSingletonMutex ();
+    ~epicsSingletonMutex ();
+    epicsMutex & get ();
+private:
+    epicsThreadOnceId onceFlag;
+    epicsMutex * pMutex;
+    static void once ( void * );
+};
+
+epicsSingletonMutex::epicsSingletonMutex () :
+    onceFlag ( EPICS_THREAD_ONCE_INIT ), pMutex ( 0 )
+{
+}
+
+epicsSingletonMutex::~epicsSingletonMutex ()
+{
+    delete this->pMutex;
+}
+
+void epicsSingletonMutex::once ( void * pParm )
+{
+    epicsSingletonMutex *pSM = static_cast < epicsSingletonMutex * > ( pParm );
+    pSM->pMutex = new epicsMutex;
+}
+
+epicsMutex & epicsSingletonMutex::get ()
+{
+    epicsThreadOnce ( & this->onceFlag, epicsSingletonMutex::once, this );
+    return * this->pMutex;
+}
+
+epicsMutex & epicsSingletonPrivateMutex ()
+{
+    static epicsSingletonMutex mutex;
+    return mutex.get ();
+}