--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/llvm/Support/Watchdog.h	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,38 @@
+//===--- Watchdog.h - Watchdog timer ----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file declares the llvm::sys::Watchdog class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_WATCHDOG_H
+#define LLVM_SUPPORT_WATCHDOG_H
+
+#include "llvm/Support/Compiler.h"
+
+namespace llvm {
+  namespace sys {
+
+    /// This class provides an abstraction for a timeout around an operation
+    /// that must complete in a given amount of time. Failure to complete before
+    /// the timeout is an unrecoverable situation and no mechanisms to attempt
+    /// to handle it are provided.
+    class Watchdog {
+    public:
+      Watchdog(unsigned int seconds);
+      ~Watchdog();
+    private:
+      // Noncopyable.
+      Watchdog(const Watchdog &other) LLVM_DELETED_FUNCTION;
+      Watchdog &operator=(const Watchdog &other) LLVM_DELETED_FUNCTION;
+    };
+  }
+}
+
+#endif