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      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   virtual ~ProfilerControllerImpl();
     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       int process_type);
     43 
     44   // ProfilerController implementation:
     45   virtual void Register(ProfilerSubscriber* subscriber) OVERRIDE;
     46   virtual void Unregister(const ProfilerSubscriber* subscriber) OVERRIDE;
     47   virtual void GetProfilerData(int sequence_number) OVERRIDE;
     48 
     49  private:
     50   friend struct DefaultSingletonTraits<ProfilerControllerImpl>;
     51 
     52   // Contact child processes and get their profiler data.
     53   void GetProfilerDataFromChildProcesses(int sequence_number);
     54 
     55   ProfilerSubscriber* subscriber_;
     56 
     57   DISALLOW_COPY_AND_ASSIGN(ProfilerControllerImpl);
     58 };
     59 
     60 }  // namespace content
     61 
     62 #endif  // CONTENT_BROWSER_PROFILER_CONTROLLER_IMPL_H_
     63