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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_MESSAGE_H_ | 5 #ifndef IPC_IPC_MESSAGE_H_ |
6 #define IPC_IPC_MESSAGE_H_ | 6 #define IPC_IPC_MESSAGE_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
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27 class FileDescriptorSet; | 27 class FileDescriptorSet; |
28 | 28 |
29 namespace IPC { | 29 namespace IPC { |
30 | 30 |
31 //------------------------------------------------------------------------------ | 31 //------------------------------------------------------------------------------ |
32 | 32 |
33 struct LogData; | 33 struct LogData; |
34 | 34 |
35 class IPC_EXPORT Message : public Pickle { | 35 class IPC_EXPORT Message : public Pickle { |
36 public: | 36 public: |
| 37 enum PriorityValue { |
| 38 PRIORITY_LOW = 1, |
| 39 PRIORITY_NORMAL, |
| 40 PRIORITY_HIGH |
| 41 }; |
| 42 |
37 // Bit values used in the flags field. | 43 // Bit values used in the flags field. |
38 // Upper 24 bits of flags store a reference number, so this enum is limited to | 44 // Upper 24 bits of flags store a reference number, so this enum is limited to |
39 // 8 bits. | 45 // 8 bits. |
40 enum { | 46 enum { |
41 UNUSED = 0x03, // Low 2 bits are not used. | 47 PRIORITY_MASK = 0x03, // Low 2 bits of store the priority value. |
42 SYNC_BIT = 0x04, | 48 SYNC_BIT = 0x04, |
43 REPLY_BIT = 0x08, | 49 REPLY_BIT = 0x08, |
44 REPLY_ERROR_BIT = 0x10, | 50 REPLY_ERROR_BIT = 0x10, |
45 UNBLOCK_BIT = 0x20, | 51 UNBLOCK_BIT = 0x20, |
46 PUMPING_MSGS_BIT = 0x40, | 52 PUMPING_MSGS_BIT = 0x40, |
47 HAS_SENT_TIME_BIT = 0x80, | 53 HAS_SENT_TIME_BIT = 0x80, |
48 }; | 54 }; |
49 | 55 |
50 virtual ~Message(); | 56 virtual ~Message(); |
51 | 57 |
52 Message(); | 58 Message(); |
53 | 59 |
54 // Initialize a message with routing ID and a user-defined type. | 60 // Initialize a message with a user-defined type, priority value, and |
55 Message(int32 routing_id, uint32 type); | 61 // destination WebView ID. |
| 62 Message(int32 routing_id, uint32 type, PriorityValue priority); |
56 | 63 |
57 // Initializes a message from a const block of data. The data is not copied; | 64 // Initializes a message from a const block of data. The data is not copied; |
58 // instead the data is merely referenced by this message. Only const methods | 65 // instead the data is merely referenced by this message. Only const methods |
59 // should be used on the message when initialized this way. | 66 // should be used on the message when initialized this way. |
60 Message(const char* data, size_t data_len); | 67 Message(const char* data, int data_len); |
61 | 68 |
62 Message(const Message& other); | 69 Message(const Message& other); |
63 Message& operator=(const Message& other); | 70 Message& operator=(const Message& other); |
64 | 71 |
| 72 PriorityValue priority() const { |
| 73 return static_cast<PriorityValue>(header()->flags & PRIORITY_MASK); |
| 74 } |
| 75 |
65 // True if this is a synchronous message. | 76 // True if this is a synchronous message. |
66 void set_sync() { | 77 void set_sync() { |
67 header()->flags |= SYNC_BIT; | 78 header()->flags |= SYNC_BIT; |
68 } | 79 } |
69 bool is_sync() const { | 80 bool is_sync() const { |
70 return (header()->flags & SYNC_BIT) != 0; | 81 return (header()->flags & SYNC_BIT) != 0; |
71 } | 82 } |
72 | 83 |
73 // Set this on a reply to a synchronous message. | 84 // Set this on a reply to a synchronous message. |
74 void set_reply() { | 85 void set_reply() { |
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273 MSG_ROUTING_NONE = -2, | 284 MSG_ROUTING_NONE = -2, |
274 | 285 |
275 // indicates a general message not sent to a particular tab. | 286 // indicates a general message not sent to a particular tab. |
276 MSG_ROUTING_CONTROL = kint32max, | 287 MSG_ROUTING_CONTROL = kint32max, |
277 }; | 288 }; |
278 | 289 |
279 #define IPC_REPLY_ID 0xFFFFFFF0 // Special message id for replies | 290 #define IPC_REPLY_ID 0xFFFFFFF0 // Special message id for replies |
280 #define IPC_LOGGING_ID 0xFFFFFFF1 // Special message id for logging | 291 #define IPC_LOGGING_ID 0xFFFFFFF1 // Special message id for logging |
281 | 292 |
282 #endif // IPC_IPC_MESSAGE_H_ | 293 #endif // IPC_IPC_MESSAGE_H_ |
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