content/child/push_messaging/push_dispatcher.h

   1 // Copyright 2014 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_CHILD_PUSH_MESSAGING_PUSH_DISPATCHER_H_
   6 #define CONTENT_CHILD_PUSH_MESSAGING_PUSH_DISPATCHER_H_
   7
   8 #include <map>
   9
  10 #include "base/synchronization/lock.h"
  11 #include "content/child/worker_thread_message_filter.h"
  12
  13 namespace content {
  14
  15 class PushDispatcher : public WorkerThreadMessageFilter {
  16  public:
  17   explicit PushDispatcher(ThreadSafeSender* thread_safe_sender);
  18
  19   // Generates a process-unique new request id. Stores it in a map as key to
  20   // |thread_id| and returns it. This method can be called on any thread.
  21   // Note that the registration requests from document contexts do not go via
  22   // this class and their request ids may overlap with the ones generated here.
  23   int GenerateRequestId(int thread_id);
  24
  25  protected:
  26   ~PushDispatcher() override;
  27
  28  private:
  29   // WorkerThreadMessageFilter:
  30   bool ShouldHandleMessage(const IPC::Message& msg) const override;
  31   void OnFilteredMessageReceived(const IPC::Message& msg) override;
  32   bool GetWorkerThreadIdForMessage(const IPC::Message& msg,
  33                                    int* ipc_thread_id) override;
  34
  35   base::Lock request_id_map_lock_;
  36   std::map<int, int> request_id_map_;  // Maps request id to thread id.
  37   int next_request_id_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(PushDispatcher);
  40 };
  41
  42 }  // namespace content
  43
  44 #endif  // CONTENT_CHILD_PUSH_MESSAGING_PUSH_DISPATCHER_H_