localStaticLock - static local thread-safety

pvDataApp/misc/localStaticLock.cpp

@@ -0,0 +1,39 @@
+/* localStaticLock.cpp */
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvData is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+/**
+ *  @author mse
+ */
+
+#include <pv/localStaticLock.h>
+
+static int nifty_counter;
+static epics::pvData::Mutex* g_localStaticInitMutex;
+
+epics::pvData::Mutex& getLocalStaticInitMutex()
+{
+    return *g_localStaticInitMutex;
+}
+
+
+// The counter is initialized at load-time, i.e., before any of the static objects are initialized.
+MutexInitializer::MutexInitializer ()
+{
+    if (0 == nifty_counter++)
+    {
+        // Initialize static members.
+        g_localStaticInitMutex = new epics::pvData::Mutex();
+    }
+}
+
+MutexInitializer::~MutexInitializer ()
+{
+    if (0 == --nifty_counter)
+    {
+        // Clean-up.
+        delete g_localStaticInitMutex;
+    }
+}