content/browser/tracing/power_tracing_agent.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_TRACING_POWER_TRACING_AGENT_H_
   6 #define CONTENT_BROWSER_TRACING_POWER_TRACING_AGENT_H_
   7
   8 #include "base/memory/ref_counted_memory.h"
   9 #include "base/threading/thread.h"
  10
  11 template <typename Type>
  12 struct DefaultSingletonTraits;
  13
  14 namespace content {
  15
  16 class BattorPowerTraceProvider;
  17
  18 class PowerTracingAgent {
  19  public:
  20   typedef base::Callback<void(const scoped_refptr<base::RefCountedString>&)>
  21       OutputCallback;
  22
  23   bool StartTracing();
  24   void StopTracing(const OutputCallback& callback);
  25
  26   // Retrieve the singleton instance.
  27   static PowerTracingAgent* GetInstance();
  28
  29  private:
  30   // This allows constructor and destructor to be private and usable only
  31   // by the Singleton class.
  32   friend struct DefaultSingletonTraits<PowerTracingAgent>;
  33
  34   // Constructor.
  35   PowerTracingAgent();
  36   virtual ~PowerTracingAgent();
  37
  38   void OnStopTracingDone(const OutputCallback& callback,
  39                          const scoped_refptr<base::RefCountedString>& result);
  40
  41   void FlushOnThread(const OutputCallback& callback);
  42
  43   scoped_ptr<BattorPowerTraceProvider> battor_trace_provider_;
  44   bool is_tracing_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(PowerTracingAgent);
  47 };
  48
  49 }  // namespace content
  50
  51 #endif  // CONTENT_BROWSER_TRACING_POWER_TRACING_AGENT_H_