Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/critical_flet.h

@@ -0,0 +1,45 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    critical flet.cpp
+
+Abstract:
+
+    Version of flet using "omp critical" directive.
+    
+    Warning: it uses omp critical section "critical_flet"
+
+Author:
+
+    Leonardo de Moura (leonardo) 2011-05-12
+
+Revision History:
+
+--*/
+#ifndef _CRITICAL_FLET_H_
+#define _CRITICAL_FLET_H_
+
+template<typename T>
+class critical_flet {
+    T & m_ref;
+    T   m_old_value;
+public:
+    critical_flet(T & ref, const T & new_value):
+        m_ref(ref),
+        m_old_value(ref) {
+        #pragma omp critical (critical_flet)
+        {
+            m_ref = new_value;
+        }
+    }
+    ~critical_flet() {
+        #pragma omp critical (critical_flet)
+        {
+            m_ref = m_old_value;
+        }
+    }
+};
+
+#endif