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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 #pragma once | 7 #pragma once |
8 | 8 |
9 #if defined(OS_WIN) | 9 #if defined(OS_WIN) |
10 #include <windows.h> | 10 #include <windows.h> |
11 #endif | 11 #endif |
12 #include <string> | 12 #include <string> |
13 #include "base/basictypes.h" | 13 #include "base/basictypes.h" |
14 #include "ipc/ipc_message.h" | 14 #include "ipc/ipc_message.h" |
15 | 15 |
16 namespace base { | 16 namespace base { |
17 class WaitableEvent; | 17 class WaitableEvent; |
18 } | 18 } |
19 | 19 |
20 namespace IPC { | 20 namespace IPC { |
21 | 21 |
22 class MessageReplyDeserializer; | 22 class MessageReplyDeserializer; |
23 | 23 |
24 class SyncMessage : public Message { | 24 class IPC_EXPORT SyncMessage : public Message { |
25 public: | 25 public: |
26 SyncMessage(int32 routing_id, uint32 type, PriorityValue priority, | 26 SyncMessage(int32 routing_id, uint32 type, PriorityValue priority, |
27 MessageReplyDeserializer* deserializer); | 27 MessageReplyDeserializer* deserializer); |
28 | 28 |
29 // Call this to get a deserializer for the output parameters. | 29 // Call this to get a deserializer for the output parameters. |
30 // Note that this can only be called once, and the caller is responsible | 30 // Note that this can only be called once, and the caller is responsible |
31 // for deleting the deserializer when they're done. | 31 // for deleting the deserializer when they're done. |
32 MessageReplyDeserializer* GetReplyDeserializer(); | 32 MessageReplyDeserializer* GetReplyDeserializer(); |
33 | 33 |
34 // If this message can cause the receiver to block while waiting for user | 34 // If this message can cause the receiver to block while waiting for user |
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74 }; | 74 }; |
75 | 75 |
76 static bool ReadSyncHeader(const Message& msg, SyncHeader* header); | 76 static bool ReadSyncHeader(const Message& msg, SyncHeader* header); |
77 static bool WriteSyncHeader(Message* msg, const SyncHeader& header); | 77 static bool WriteSyncHeader(Message* msg, const SyncHeader& header); |
78 | 78 |
79 MessageReplyDeserializer* deserializer_; | 79 MessageReplyDeserializer* deserializer_; |
80 base::WaitableEvent* pump_messages_event_; | 80 base::WaitableEvent* pump_messages_event_; |
81 }; | 81 }; |
82 | 82 |
83 // Used to deserialize parameters from a reply to a synchronous message | 83 // Used to deserialize parameters from a reply to a synchronous message |
84 class MessageReplyDeserializer { | 84 class IPC_EXPORT MessageReplyDeserializer { |
85 public: | 85 public: |
86 virtual ~MessageReplyDeserializer() {} | 86 virtual ~MessageReplyDeserializer() {} |
87 bool SerializeOutputParameters(const Message& msg); | 87 bool SerializeOutputParameters(const Message& msg); |
88 private: | 88 private: |
89 // Derived classes need to implement this, using the given iterator (which | 89 // Derived classes need to implement this, using the given iterator (which |
90 // is skipped past the header for synchronous messages). | 90 // is skipped past the header for synchronous messages). |
91 virtual bool SerializeOutputParameters(const Message& msg, void* iter) = 0; | 91 virtual bool SerializeOutputParameters(const Message& msg, void* iter) = 0; |
92 }; | 92 }; |
93 | 93 |
94 // When sending a synchronous message, this structure contains an object | 94 // When sending a synchronous message, this structure contains an object |
95 // that knows how to deserialize the response. | 95 // that knows how to deserialize the response. |
96 struct PendingSyncMsg { | 96 struct PendingSyncMsg { |
97 PendingSyncMsg(int id, | 97 PendingSyncMsg(int id, |
98 MessageReplyDeserializer* d, | 98 MessageReplyDeserializer* d, |
99 base::WaitableEvent* e) | 99 base::WaitableEvent* e) |
100 : id(id), deserializer(d), done_event(e), send_result(false) { } | 100 : id(id), deserializer(d), done_event(e), send_result(false) { } |
101 int id; | 101 int id; |
102 MessageReplyDeserializer* deserializer; | 102 MessageReplyDeserializer* deserializer; |
103 base::WaitableEvent* done_event; | 103 base::WaitableEvent* done_event; |
104 bool send_result; | 104 bool send_result; |
105 }; | 105 }; |
106 | 106 |
107 } // namespace IPC | 107 } // namespace IPC |
108 | 108 |
109 #endif // IPC_IPC_SYNC_MESSAGE_H_ | 109 #endif // IPC_IPC_SYNC_MESSAGE_H_ |
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