content/utility/utility_thread.h

   1 // Copyright (c) 2011 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_UTILITY_UTILITY_THREAD_H_
   6 #define CONTENT_UTILITY_UTILITY_THREAD_H_
   7 #pragma once
   8
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/compiler_specific.h"
  14 #include "base/string16.h"
  15 #include "content/common/child_thread.h"
  16
  17 class IndexedDBKey;
  18 class SerializedScriptValue;
  19
  20 namespace webkit_glue {
  21 class WebKitPlatformSupportImpl;
  22 }
  23
  24 // This class represents the background thread where the utility task runs.
  25 class UtilityThread : public ChildThread {
  26  public:
  27   UtilityThread();
  28   virtual ~UtilityThread();
  29
  30   // Releases the process if we are not (or no longer) in batch mode.
  31   void ReleaseProcessIfNeeded();
  32
  33   // Returns the one utility thread.
  34   static UtilityThread* current() {
  35     return static_cast<UtilityThread*>(ChildThread::current());
  36   }
  37
  38  private:
  39   // ChildThread implementation.
  40   virtual bool OnControlMessageReceived(const IPC::Message& msg) OVERRIDE;
  41
  42   // IPC message handlers.
  43   void OnIDBKeysFromValuesAndKeyPath(
  44       int id,
  45       const std::vector<SerializedScriptValue>& serialized_script_values,
  46       const string16& idb_key_path);
  47   void OnInjectIDBKey(const IndexedDBKey& key,
  48                       const SerializedScriptValue& value,
  49                       const string16& key_path);
  50   void OnBatchModeStarted();
  51   void OnBatchModeFinished();
  52
  53   // True when we're running in batch mode.
  54   bool batch_mode_;
  55
  56   scoped_ptr<webkit_glue::WebKitPlatformSupportImpl> webkit_platform_support_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(UtilityThread);
  59 };
  60
  61 #endif  // CONTENT_UTILITY_UTILITY_THREAD_H_