1 files changed, 40 insertions, 0 deletions
diff --git a/chrome/gpu/gpu_watchdog_thread.h b/chrome/gpu/gpu_watchdog_thread.h
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+++ b/chrome/gpu/gpu_watchdog_thread.h
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+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_GPU_GPU_WATCHDOG_THREAD_H_
+#define CHROME_GPU_GPU_WATCHDOG_THREAD_H_
+
+#include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "base/task.h"
+#include "base/thread.h"
+
+// A thread that intermitently sends tasks to a group of watched message loops
+// and deliberately crashes if one of them does not respond after a timeout.
+class GpuWatchdogThread : public base::Thread,
+                          public base::RefCountedThreadSafe<GpuWatchdogThread> {
+ public:
+  explicit GpuWatchdogThread(MessageLoop* watched_message_loop);
+  virtual ~GpuWatchdogThread();
+
+ protected:
+  virtual void Init();
+  virtual void CleanUp();
+
+ private:
+  void OnAcknowledge();
+  void OnCheck();
+  void PostAcknowledge();
+  void OnExit();
+  void Disable();
+
+  MessageLoop* watched_message_loop_;
+
+  typedef ScopedRunnableMethodFactory<GpuWatchdogThread> MethodFactory;
+  scoped_ptr<MethodFactory> method_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuWatchdogThread);
+};
+
+#endif  // CHROME_GPU_GPU_WATCHDOG_THREAD_H_