1 // Copyright 2013 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_MESSAGE_PORT_MESSAGE_FILTER_H_ 6 #define CONTENT_BROWSER_MESSAGE_PORT_MESSAGE_FILTER_H_ 7 8 #include "base/callback.h" 9 #include "content/public/browser/browser_message_filter.h" 10 11 namespace content { 12 13 // Filter for MessagePort related IPC messages (creating and destroying a 14 // MessagePort, sending a message via a MessagePort etc). 15 class MessagePortMessageFilter : public BrowserMessageFilter { 16 public: 17 typedef base::Callback<int(void)> NextRoutingIDCallback; 18 19 // |next_routing_id| is owned by this object. It can be used up until 20 // OnChannelClosing. 21 explicit MessagePortMessageFilter(const NextRoutingIDCallback& callback); 22 23 // BrowserMessageFilter implementation. 24 virtual void OnChannelClosing() OVERRIDE; 25 virtual bool OnMessageReceived(const IPC::Message& message, 26 bool* message_was_ok) OVERRIDE; 27 virtual void OnDestruct() const OVERRIDE; 28 29 int GetNextRoutingID(); 30 31 private: 32 friend class BrowserThread; 33 friend class base::DeleteHelper<MessagePortMessageFilter>; 34 35 virtual ~MessagePortMessageFilter(); 36 37 // Message handlers. 38 void OnCreateMessagePort(int* route_id, int* message_port_id); 39 40 // This is guaranteed to be valid until OnChannelClosing is invoked, and it's 41 // not used after. 42 NextRoutingIDCallback next_routing_id_; 43 44 DISALLOW_IMPLICIT_CONSTRUCTORS(MessagePortMessageFilter); 45 }; 46 47 } // namespace content 48 49 #endif // CONTENT_BROWSER_WORKER_MESSAGE_FILTER_H_ 50