1 | /* |
2 | * Copyright (C) 2018 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 "ProcessIdentifier.h" |
29 | #include <wtf/Hasher.h> |
30 | #include <wtf/text/StringConcatenateNumbers.h> |
31 | |
32 | namespace WebCore { |
33 | |
34 | struct MessagePortIdentifier { |
35 | ProcessIdentifier processIdentifier; |
36 | enum PortIdentifierType { }; |
37 | ObjectIdentifier<PortIdentifierType> portIdentifier; |
38 | |
39 | unsigned hash() const; |
40 | |
41 | template<class Encoder> void encode(Encoder&) const; |
42 | template<class Decoder> static Optional<MessagePortIdentifier> decode(Decoder&); |
43 | |
44 | #if !LOG_DISABLED |
45 | String logString() const; |
46 | #endif |
47 | }; |
48 | |
49 | inline bool operator==(const MessagePortIdentifier& a, const MessagePortIdentifier& b) |
50 | { |
51 | return a.processIdentifier == b.processIdentifier && a.portIdentifier == b.portIdentifier; |
52 | } |
53 | |
54 | template<class Encoder> |
55 | void MessagePortIdentifier::encode(Encoder& encoder) const |
56 | { |
57 | encoder << processIdentifier << portIdentifier; |
58 | } |
59 | |
60 | template<class Decoder> |
61 | Optional<MessagePortIdentifier> MessagePortIdentifier::decode(Decoder& decoder) |
62 | { |
63 | Optional<ProcessIdentifier> processIdentifier; |
64 | decoder >> processIdentifier; |
65 | if (!processIdentifier) |
66 | return WTF::nullopt; |
67 | |
68 | Optional<ObjectIdentifier<PortIdentifierType>> portIdentifier; |
69 | decoder >> portIdentifier; |
70 | if (!portIdentifier) |
71 | return WTF::nullopt; |
72 | |
73 | return { { WTFMove(*processIdentifier), WTFMove(*portIdentifier) } }; |
74 | } |
75 | |
76 | inline unsigned MessagePortIdentifier::hash() const |
77 | { |
78 | return computeHash(processIdentifier.toUInt64(), portIdentifier.toUInt64()); |
79 | } |
80 | |
81 | #if !LOG_DISABLED |
82 | |
83 | inline String MessagePortIdentifier::logString() const |
84 | { |
85 | return makeString(processIdentifier.toUInt64(), '-', portIdentifier.toUInt64()); |
86 | } |
87 | |
88 | #endif |
89 | |
90 | } // namespace WebCore |
91 | |
92 | namespace WTF { |
93 | |
94 | struct MessagePortIdentifierHash { |
95 | static unsigned hash(const WebCore::MessagePortIdentifier& key) { return key.hash(); } |
96 | static bool equal(const WebCore::MessagePortIdentifier& a, const WebCore::MessagePortIdentifier& b) { return a == b; } |
97 | static const bool safeToCompareToEmptyOrDeleted = true; |
98 | }; |
99 | |
100 | template<> struct HashTraits<WebCore::MessagePortIdentifier> : GenericHashTraits<WebCore::MessagePortIdentifier> { |
101 | static WebCore::MessagePortIdentifier emptyValue() { return { }; } |
102 | |
103 | static void constructDeletedValue(WebCore::MessagePortIdentifier& slot) { slot.processIdentifier = makeObjectIdentifier<WebCore::ProcessIdentifierType>(std::numeric_limits<uint64_t>::max()); } |
104 | |
105 | static bool isDeletedValue(const WebCore::MessagePortIdentifier& slot) { return slot.processIdentifier.toUInt64() == std::numeric_limits<uint64_t>::max(); } |
106 | }; |
107 | |
108 | template<> struct DefaultHash<WebCore::MessagePortIdentifier> { |
109 | typedef MessagePortIdentifierHash Hash; |
110 | }; |
111 | |
112 | } // namespace WTF |
113 | |