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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef IPC_IPC_SYNC_MESSAGE_H_ | 5 #ifndef IPC_IPC_SYNC_MESSAGE_H_ |
6 #define IPC_IPC_SYNC_MESSAGE_H_ | 6 #define IPC_IPC_SYNC_MESSAGE_H_ |
7 | 7 |
8 #if defined(OS_WIN) | 8 #if defined(OS_WIN) |
9 #include <windows.h> | 9 #include <windows.h> |
10 #endif | 10 #endif |
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53 | 53 |
54 base::WaitableEvent* pump_messages_event() const { | 54 base::WaitableEvent* pump_messages_event() const { |
55 return pump_messages_event_; | 55 return pump_messages_event_; |
56 } | 56 } |
57 | 57 |
58 // Returns true if the message is a reply to the given request id. | 58 // Returns true if the message is a reply to the given request id. |
59 static bool IsMessageReplyTo(const Message& msg, int request_id); | 59 static bool IsMessageReplyTo(const Message& msg, int request_id); |
60 | 60 |
61 // Given a reply message, returns an iterator to the beginning of the data | 61 // Given a reply message, returns an iterator to the beginning of the data |
62 // (i.e. skips over the synchronous specific data). | 62 // (i.e. skips over the synchronous specific data). |
63 static PickleIterator GetDataIterator(const Message* msg); | 63 static base::PickleIterator GetDataIterator(const Message* msg); |
64 | 64 |
65 // Given a synchronous message (or its reply), returns its id. | 65 // Given a synchronous message (or its reply), returns its id. |
66 static int GetMessageId(const Message& msg); | 66 static int GetMessageId(const Message& msg); |
67 | 67 |
68 // Generates a reply message to the given message. | 68 // Generates a reply message to the given message. |
69 static Message* GenerateReply(const Message* msg); | 69 static Message* GenerateReply(const Message* msg); |
70 | 70 |
71 private: | 71 private: |
72 struct SyncHeader { | 72 struct SyncHeader { |
73 // unique ID (unique per sender) | 73 // unique ID (unique per sender) |
74 int message_id; | 74 int message_id; |
75 }; | 75 }; |
76 | 76 |
77 static bool ReadSyncHeader(const Message& msg, SyncHeader* header); | 77 static bool ReadSyncHeader(const Message& msg, SyncHeader* header); |
78 static bool WriteSyncHeader(Message* msg, const SyncHeader& header); | 78 static bool WriteSyncHeader(Message* msg, const SyncHeader& header); |
79 | 79 |
80 scoped_ptr<MessageReplyDeserializer> deserializer_; | 80 scoped_ptr<MessageReplyDeserializer> deserializer_; |
81 base::WaitableEvent* pump_messages_event_; | 81 base::WaitableEvent* pump_messages_event_; |
82 }; | 82 }; |
83 | 83 |
84 // Used to deserialize parameters from a reply to a synchronous message | 84 // Used to deserialize parameters from a reply to a synchronous message |
85 class IPC_EXPORT MessageReplyDeserializer { | 85 class IPC_EXPORT MessageReplyDeserializer { |
86 public: | 86 public: |
87 virtual ~MessageReplyDeserializer() {} | 87 virtual ~MessageReplyDeserializer() {} |
88 bool SerializeOutputParameters(const Message& msg); | 88 bool SerializeOutputParameters(const Message& msg); |
89 private: | 89 private: |
90 // Derived classes need to implement this, using the given iterator (which | 90 // Derived classes need to implement this, using the given iterator (which |
91 // is skipped past the header for synchronous messages). | 91 // is skipped past the header for synchronous messages). |
92 virtual bool SerializeOutputParameters(const Message& msg, | 92 virtual bool SerializeOutputParameters(const Message& msg, |
93 PickleIterator iter) = 0; | 93 base::PickleIterator iter) = 0; |
94 }; | 94 }; |
95 | 95 |
96 // When sending a synchronous message, this structure contains an object | 96 // When sending a synchronous message, this structure contains an object |
97 // that knows how to deserialize the response. | 97 // that knows how to deserialize the response. |
98 struct PendingSyncMsg { | 98 struct PendingSyncMsg { |
99 PendingSyncMsg(int id, | 99 PendingSyncMsg(int id, |
100 MessageReplyDeserializer* d, | 100 MessageReplyDeserializer* d, |
101 base::WaitableEvent* e) | 101 base::WaitableEvent* e) |
102 : id(id), deserializer(d), done_event(e), send_result(false) { } | 102 : id(id), deserializer(d), done_event(e), send_result(false) { } |
103 int id; | 103 int id; |
104 MessageReplyDeserializer* deserializer; | 104 MessageReplyDeserializer* deserializer; |
105 base::WaitableEvent* done_event; | 105 base::WaitableEvent* done_event; |
106 bool send_result; | 106 bool send_result; |
107 }; | 107 }; |
108 | 108 |
109 } // namespace IPC | 109 } // namespace IPC |
110 | 110 |
111 #endif // IPC_IPC_SYNC_MESSAGE_H_ | 111 #endif // IPC_IPC_SYNC_MESSAGE_H_ |
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