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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 MOJO_EDK_SYSTEM_CHANNEL_H_ | 5 #ifndef MOJO_EDK_SYSTEM_CHANNEL_H_ |
6 #define MOJO_EDK_SYSTEM_CHANNEL_H_ | 6 #define MOJO_EDK_SYSTEM_CHANNEL_H_ |
7 | 7 |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "base/macros.h" | 9 #include "base/macros.h" |
10 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
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38 // A control message containing handles to echo back. | 38 // A control message containing handles to echo back. |
39 HANDLES_SENT, | 39 HANDLES_SENT, |
40 // A control message containing handles that can now be closed. | 40 // A control message containing handles that can now be closed. |
41 HANDLES_SENT_ACK, | 41 HANDLES_SENT_ACK, |
42 #endif | 42 #endif |
43 }; | 43 }; |
44 | 44 |
45 // Message size in bytes, including the header. | 45 // Message size in bytes, including the header. |
46 uint32_t num_bytes; | 46 uint32_t num_bytes; |
47 | 47 |
48 #if defined(OS_CHROMEOS) | 48 #if defined(OS_CHROMEOS) || defined(OS_ANDROID) |
49 // Old message wire format for ChromeOS. | 49 // Old message wire format for ChromeOS and Android. |
50 // Number of attached handles. | 50 // Number of attached handles. |
51 uint16_t num_handles; | 51 uint16_t num_handles; |
52 | 52 |
53 MessageType message_type; | 53 MessageType message_type; |
54 #else | 54 #else |
55 // Total size of header, including extra header data (i.e. HANDLEs on | 55 // Total size of header, including extra header data (i.e. HANDLEs on |
56 // windows). | 56 // windows). |
57 uint16_t num_header_bytes; | 57 uint16_t num_header_bytes; |
58 | 58 |
59 // Number of attached handles. May be less than the reserved handle | 59 // Number of attached handles. May be less than the reserved handle |
60 // storage size in this message on platforms that serialise handles as | 60 // storage size in this message on platforms that serialise handles as |
61 // data (i.e. HANDLEs on Windows, Mach ports on OSX). | 61 // data (i.e. HANDLEs on Windows, Mach ports on OSX). |
62 uint16_t num_handles; | 62 uint16_t num_handles; |
63 | 63 |
64 MessageType message_type; | 64 MessageType message_type; |
65 | 65 |
66 char padding[6]; | 66 char padding[6]; |
67 #endif // defined(OS_CHROMEOS) | 67 #endif // defined(OS_CHROMEOS) || defined(OS_ANDROID) |
68 }; | 68 }; |
69 #pragma pack(pop) | 69 #pragma pack(pop) |
70 | 70 |
71 // Allocates and owns a buffer for message data with enough capacity for | 71 // Allocates and owns a buffer for message data with enough capacity for |
72 // |payload_size| bytes plus a header, plus |max_handles| platform handles. | 72 // |payload_size| bytes plus a header, plus |max_handles| platform handles. |
73 Message(size_t payload_size, | 73 Message(size_t payload_size, |
74 size_t max_handles, | 74 size_t max_handles, |
75 Header::MessageType message_type = Header::MessageType::NORMAL); | 75 Header::MessageType message_type = Header::MessageType::NORMAL); |
76 | 76 |
77 ~Message(); | 77 ~Message(); |
78 | 78 |
79 // Constructs a Message from serialized message data. | 79 // Constructs a Message from serialized message data. |
80 static MessagePtr Deserialize(const void* data, size_t data_num_bytes); | 80 static MessagePtr Deserialize(const void* data, size_t data_num_bytes); |
81 | 81 |
82 const void* data() const { return data_; } | 82 const void* data() const { return data_; } |
83 size_t data_num_bytes() const { return size_; } | 83 size_t data_num_bytes() const { return size_; } |
84 | 84 |
85 #if defined(OS_CHROMEOS) | 85 #if defined(OS_CHROMEOS) || defined(OS_ANDROID) |
86 void* mutable_payload() { return static_cast<void*>(header_ + 1); } | 86 void* mutable_payload() { return static_cast<void*>(header_ + 1); } |
87 const void* payload() const { | 87 const void* payload() const { |
88 return static_cast<const void*>(header_ + 1); | 88 return static_cast<const void*>(header_ + 1); |
89 } | 89 } |
90 size_t payload_size() const; | 90 size_t payload_size() const; |
91 #else | 91 #else |
92 const void* extra_header() const { return data_ + sizeof(Header); } | 92 const void* extra_header() const { return data_ + sizeof(Header); } |
93 void* mutable_extra_header() { return data_ + sizeof(Header); } | 93 void* mutable_extra_header() { return data_ + sizeof(Header); } |
94 size_t extra_header_size() const { | 94 size_t extra_header_size() const { |
95 return header_->num_header_bytes - sizeof(Header); | 95 return header_->num_header_bytes - sizeof(Header); |
96 } | 96 } |
97 | 97 |
98 void* mutable_payload() { return data_ + header_->num_header_bytes; } | 98 void* mutable_payload() { return data_ + header_->num_header_bytes; } |
99 const void* payload() const { return data_ + header_->num_header_bytes; } | 99 const void* payload() const { return data_ + header_->num_header_bytes; } |
100 size_t payload_size() const; | 100 size_t payload_size() const; |
101 #endif // defined(OS_CHROMEOS) | 101 #endif // defined(OS_CHROMEOS) || defined(OS_ANDROID) |
102 | 102 |
103 size_t num_handles() const { return header_->num_handles; } | 103 size_t num_handles() const { return header_->num_handles; } |
104 bool has_handles() const { return header_->num_handles > 0; } | 104 bool has_handles() const { return header_->num_handles > 0; } |
105 PlatformHandle* handles(); | 105 PlatformHandle* handles(); |
106 #if defined(OS_MACOSX) && !defined(OS_IOS) | 106 #if defined(OS_MACOSX) && !defined(OS_IOS) |
107 bool has_mach_ports() const; | 107 bool has_mach_ports() const; |
108 #endif | 108 #endif |
109 | 109 |
110 // Note: SetHandles() and TakeHandles() invalidate any previous value of | 110 // Note: SetHandles() and TakeHandles() invalidate any previous value of |
111 // handles(). | 111 // handles(). |
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232 Delegate* delegate_; | 232 Delegate* delegate_; |
233 const scoped_ptr<ReadBuffer> read_buffer_; | 233 const scoped_ptr<ReadBuffer> read_buffer_; |
234 | 234 |
235 DISALLOW_COPY_AND_ASSIGN(Channel); | 235 DISALLOW_COPY_AND_ASSIGN(Channel); |
236 }; | 236 }; |
237 | 237 |
238 } // namespace edk | 238 } // namespace edk |
239 } // namespace mojo | 239 } // namespace mojo |
240 | 240 |
241 #endif // MOJO_EDK_SYSTEM_CHANNEL_H_ | 241 #endif // MOJO_EDK_SYSTEM_CHANNEL_H_ |
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