1 files changed, 96 insertions, 0 deletions
diff --git a/include/lldb/Core/ThreadSafeValue.h b/include/lldb/Core/ThreadSafeValue.h
new file mode 100644
index 000000000000..42a5a5c6725a
--- /dev/null
+++ b/include/lldb/Core/ThreadSafeValue.h
@@ -0,0 +1,96 @@
+//===-- ThreadSafeValue.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_ThreadSafeValue_h_
+#define liblldb_ThreadSafeValue_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/Host/Mutex.h"
+
+namespace lldb_private {
+
+template <class T>
+class ThreadSafeValue
+{
+public:
+    //------------------------------------------------------------------
+    // Constructors and Destructors
+    //------------------------------------------------------------------
+    ThreadSafeValue() :
+        m_value (),
+        m_mutex (Mutex::eMutexTypeRecursive)
+    {
+    }
+
+    ThreadSafeValue(const T& value) :
+        m_value (value),
+        m_mutex (Mutex::eMutexTypeRecursive)
+    {
+    }
+
+    ~ThreadSafeValue()
+    {
+    }
+
+    T
+    GetValue () const
+    {
+        T value;
+        {
+            Mutex::Locker locker(m_mutex);
+            value = m_value;
+        }
+        return value;
+    }
+
+    // Call this if you have already manually locked the mutex using the
+    // GetMutex() accessor
+    const T&
+    GetValueNoLock () const
+    {
+        return m_value;
+    }
+
+    void
+    SetValue (const T& value)
+    {
+        Mutex::Locker locker(m_mutex);
+        m_value = value;
+    }
+
+    // Call this if you have already manually locked the mutex using the
+    // GetMutex() accessor
+    void
+    SetValueNoLock (const T& value)
+    {
+        m_value = value;
+    }
+
+    Mutex &
+    GetMutex ()
+    {
+        return m_mutex;
+    }
+
+private:
+    T m_value;
+    mutable Mutex m_mutex;
+
+    //------------------------------------------------------------------
+    // For ThreadSafeValue only
+    //------------------------------------------------------------------
+    DISALLOW_COPY_AND_ASSIGN (ThreadSafeValue);
+};
+
+
+} // namespace lldb_private
+#endif  // liblldb_ThreadSafeValue_h_