1 files changed, 56 insertions, 0 deletions
diff --git a/include/lldb/Utility/RefCounter.h b/include/lldb/Utility/RefCounter.h
new file mode 100644
index 0000000..6daed54
--- /dev/null
+++ b/include/lldb/Utility/RefCounter.h
@@ -0,0 +1,56 @@
+//===-- RefCounter.h --------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_RefCounter_h_
+#define liblldb_RefCounter_h_
+
+#include "lldb/lldb-public.h"
+
+namespace lldb_utility {
+
+//----------------------------------------------------------------------
+// A simple reference counter object. You need an uint32_t* to use it
+// Once that is in place, everyone who needs to ref-count, can say
+// RefCounter ref(ptr);
+// (of course, the pointer is a shared resource, and must be accessible to
+// everyone who needs it). Synchronization is handled by RefCounter itself
+// The counter is decreased each time a RefCounter to it goes out of scope
+//----------------------------------------------------------------------
+class RefCounter
+{
+public:
+    typedef uint32_t value_type;
+    
+    RefCounter(value_type* ctr);
+    
+    ~RefCounter();
+    
+private:
+    value_type* m_counter;
+    DISALLOW_COPY_AND_ASSIGN (RefCounter);
+    
+    template <class T>
+    inline T
+    increment(T* t)
+    {
+        return __sync_fetch_and_add(t, 1);
+    }
+    
+    template <class T>
+    inline T
+    decrement(T* t)
+    {
+        return __sync_fetch_and_add(t, -1);
+    }
+    
+};
+
+} // namespace lldb_utility
+
+#endif // #ifndef liblldb_RefCounter_h_