1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/Assertions.h>
29
30namespace IPC {
31
32class Connection;
33class Decoder;
34class Encoder;
35
36class MessageReceiver {
37public:
38 virtual ~MessageReceiver()
39 {
40 ASSERT(!m_messageReceiverMapCount);
41 }
42
43 virtual void didReceiveMessage(Connection&, Decoder&) = 0;
44 virtual void didReceiveSyncMessage(Connection&, Decoder&, std::unique_ptr<Encoder>&)
45 {
46 ASSERT_NOT_REACHED();
47 }
48
49private:
50 friend class MessageReceiverMap;
51
52 void willBeAddedToMessageReceiverMap()
53 {
54#if !ASSERT_DISABLED
55 m_messageReceiverMapCount++;
56#endif
57 }
58
59 void willBeRemovedFromMessageReceiverMap()
60 {
61 ASSERT(m_messageReceiverMapCount);
62#if !ASSERT_DISABLED
63 m_messageReceiverMapCount--;
64#endif
65 }
66
67#if !ASSERT_DISABLED
68 unsigned m_messageReceiverMapCount { 0 };
69#endif
70};
71
72} // namespace IPC
73