content/browser/profiler_controller_impl.h

   1 // Copyright (c) 2012 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_PROFILER_CONTROLLER_IMPL_H_
   6 #define CONTENT_BROWSER_PROFILER_CONTROLLER_IMPL_H_
   7
   8 #include "base/memory/singleton.h"
   9 #include "base/process/process.h"
  10 #include "content/common/content_export.h"
  11 #include "content/public/browser/profiler_controller.h"
  12 #include "content/public/common/process_type.h"
  13
  14 namespace tracked_objects {
  15 struct ProcessDataSnapshot;
  16 }
  17
  18 namespace content {
  19
  20 // ProfilerController's implementation.
  21 class ProfilerControllerImpl : public ProfilerController {
  22  public:
  23   static ProfilerControllerImpl* GetInstance();
  24
  25   // Normally instantiated when the child process is launched. Only one instance
  26   // should be created per process.
  27   ProfilerControllerImpl();
  28   ~ProfilerControllerImpl() override;
  29
  30   // Notify the |subscriber_| that it should expect at least |pending_processes|
  31   // additional calls to OnProfilerDataCollected().  OnPendingProcess() may be
  32   // called repeatedly; the last call will have |end| set to true, indicating
  33   // that there is no longer a possibility for the count of pending processes to
  34   // increase.  This is called on the UI thread.
  35   void OnPendingProcesses(int sequence_number, int pending_processes, bool end);
  36
  37   // Send the |profiler_data| back to the |subscriber_|.
  38   // This can be called from any thread.
  39   void OnProfilerDataCollected(
  40       int sequence_number,
  41       const tracked_objects::ProcessDataSnapshot& profiler_data,
  42       content::ProcessType process_type);
  43
  44   // ProfilerController implementation:
  45   void Register(ProfilerSubscriber* subscriber) override;
  46   void Unregister(const ProfilerSubscriber* subscriber) override;
  47   void GetProfilerData(int sequence_number,
  48                        int current_profiling_phase) override;
  49   void OnProfilingPhaseCompleted(int profiling_phase) override;
  50
  51  private:
  52   friend struct DefaultSingletonTraits<ProfilerControllerImpl>;
  53
  54   // Contact child processes and get their profiler data.
  55   void GetProfilerDataFromChildProcesses(int sequence_number,
  56                                          int current_profiling_phase);
  57
  58   // Contact child processes and notify them of a profiling phase completion.
  59   static void NotifyChildProcessesOfProfilingPhaseCompletion(
  60       int profiling_phase);
  61
  62   ProfilerSubscriber* subscriber_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(ProfilerControllerImpl);
  65 };
  66
  67 }  // namespace content
  68
  69 #endif  // CONTENT_BROWSER_PROFILER_CONTROLLER_IMPL_H_