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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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