src/components/tracing/child_trace_message_filter.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 COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
   6 #define COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
   7
   8 #include "base/bind.h"
   9 #include "base/memory/ref_counted_memory.h"
  10 #include "ipc/ipc_channel_proxy.h"
  11
  12 namespace base {
  13 class MessageLoopProxy;
  14 }
  15
  16 namespace tracing {
  17
  18 // This class sends and receives trace messages on child processes.
  19 class ChildTraceMessageFilter : public IPC::ChannelProxy::MessageFilter {
  20  public:
  21   explicit ChildTraceMessageFilter(base::MessageLoopProxy* ipc_message_loop);
  22
  23   // IPC::ChannelProxy::MessageFilter implementation.
  24   virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
  25   virtual void OnFilterRemoved() OVERRIDE;
  26   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  27
  28  protected:
  29   virtual ~ChildTraceMessageFilter();
  30
  31  private:
  32   // Message handlers.
  33   void OnBeginTracing(const std::string& category_filter_str,
  34                       base::TimeTicks browser_time,
  35                       int options,
  36                       bool tracing_startup);
  37   void OnEndTracing();
  38   void OnEnableMonitoring(const std::string& category_filter_str,
  39                           base::TimeTicks browser_time,
  40                           int options);
  41   void OnDisableMonitoring();
  42   void OnCaptureMonitoringSnapshot();
  43   void OnGetTraceBufferPercentFull();
  44   void OnSetWatchEvent(const std::string& category_name,
  45                        const std::string& event_name);
  46   void OnCancelWatchEvent();
  47
  48   // Callback from trace subsystem.
  49   void OnTraceDataCollected(
  50       const scoped_refptr<base::RefCountedString>& events_str_ptr,
  51       bool has_more_events);
  52
  53   void OnMonitoringTraceDataCollected(
  54       const scoped_refptr<base::RefCountedString>& events_str_ptr,
  55       bool has_more_events);
  56
  57   void OnTraceNotification(int notification);
  58
  59   IPC::Channel* channel_;
  60   base::MessageLoopProxy* ipc_message_loop_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(ChildTraceMessageFilter);
  63 };
  64
  65 }  // namespace tracing
  66
  67 #endif  // COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_