installed into cvs

src/libCom/cxxTemplates/epicsSingletonBase.cpp

@@ -0,0 +1,30 @@
+/*
+ *  $Id$
+ *
+ *  Author: Jeffrey O. Hill
+ *
+ */
+
+#include <new>
+
+#define epicsExportSharedSymbols
+#include "epicsMutex.h"
+#include "epicsGuard.h"
+#include "epicsSingleton.h"
+
+epicsMutex epicsSingletonBase::mutex;
+
+epicsSingletonBase::~epicsSingletonBase ()
+{
+}
+
+void epicsSingletonBase::lockedFactory ()
+{
+    epicsGuard < epicsMutex > guard ( this->mutex );
+    if ( ! this->pSingleton ) {
+        this->pSingleton = this->factory ();
+        if ( ! this->pSingleton ) {
+            throw std::bad_alloc ();
+        }
+    }
+}