• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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_SERVICE_H_
6 #define CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_
7 
8 #include <map>
9 #include <utility>
10 #include <vector>
11 
12 #include "base/basictypes.h"
13 #include "base/memory/singleton.h"
14 #include "base/strings/string16.h"
15 #include "ipc/ipc_message.h"
16 
17 namespace content {
18 class MessagePortMessageFilter;
19 
20 class MessagePortService {
21  public:
22   typedef std::vector<std::pair<base::string16, std::vector<int> > >
23       QueuedMessages;
24 
25   // Returns the MessagePortService singleton.
26   static MessagePortService* GetInstance();
27 
28   // These methods correspond to the message port related IPCs.
29   void Create(int route_id,
30               MessagePortMessageFilter* filter,
31               int* message_port_id);
32   void Destroy(int message_port_id);
33   void Entangle(int local_message_port_id, int remote_message_port_id);
34   void PostMessage(int sender_message_port_id,
35                    const base::string16& message,
36                    const std::vector<int>& sent_message_port_ids);
37   void QueueMessages(int message_port_id);
38   void SendQueuedMessages(int message_port_id,
39                           const QueuedMessages& queued_messages);
40 
41   // Updates the information needed to reach a message port when it's sent to a
42   // (possibly different) process.
43   void UpdateMessagePort(
44       int message_port_id,
45       MessagePortMessageFilter* filter,
46       int routing_id);
47 
48   void OnMessagePortMessageFilterClosing(MessagePortMessageFilter* filter);
49 
50   // Attempts to send the queued messages for a message port.
51   void SendQueuedMessagesIfPossible(int message_port_id);
52 
53  private:
54   friend struct DefaultSingletonTraits<MessagePortService>;
55 
56   MessagePortService();
57   ~MessagePortService();
58 
59   void PostMessageTo(int message_port_id,
60                      const base::string16& message,
61                      const std::vector<int>& sent_message_port_ids);
62 
63   // Handles the details of removing a message port id. Before calling this,
64   // verify that the message port id exists.
65   void Erase(int message_port_id);
66 
67   struct MessagePort;
68   typedef std::map<int, MessagePort> MessagePorts;
69   MessagePorts message_ports_;
70 
71   // We need globally unique identifiers for each message port.
72   int next_message_port_id_;
73 
74   DISALLOW_COPY_AND_ASSIGN(MessagePortService);
75 };
76 
77 }  // namespace content
78 
79 #endif  // CONTENT_BROWSER_MESSAGE_PORT_SERVICE_H_
80