1 files changed, 35 insertions, 0 deletions
diff --git a/src/util/unique_id.h b/src/util/unique_id.h
new file mode 100644
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+++ b/src/util/unique_id.h
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+/*********************                                           -*- C++ -*-  */
+/** unique_id.h
+ ** This file is part of the CVC4 prototype.
+ ** Copyright (c) 2009 The Analysis of Computer Systems Group (ACSys)
+ ** Courant Institute of Mathematical Sciences
+ ** New York University
+ ** See the file COPYING in the top-level source directory for licensing
+ ** information.
+ **
+ **/
+
+#ifndef __CVC4_UNIQUE_ID_H
+#define __CVC4_UNIQUE_ID_H
+
+namespace CVC4 {
+
+// NOTE that UniqueID is intended for startup registration; it
+// shouldn't be used in multi-threaded contexts.
+
+template <class T>
+class UniqueID {
+  static unsigned s_topID;
+  const unsigned d_thisID;
+
+public:
+  UniqueID() : d_thisID( s_topID++ ) { }
+  operator unsigned() const { return d_thisID; }
+};
+
+template <class T>
+unsigned UniqueID<T>::s_topID = 0;
+
+} /* CVC4 namespace */
+
+#endif /* __CVC4_UNIQUE_ID_H */