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| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef IPC_IPC_CHANNEL_HANDLE_H_ |
| 6 #define IPC_IPC_CHANNEL_HANDLE_H_ |
| 7 |
| 8 #include "build/build_config.h" |
| 9 |
| 10 #if defined(OS_POSIX) |
| 11 #include "base/file_descriptor_posix.h" |
| 12 #endif |
| 13 |
| 14 // On Windows, any process can create an IPC channel and others can fetch |
| 15 // it by name. We pass around the channel names over IPC. |
| 16 // On POSIX, we instead pass around handles to channel endpoints via IPC. |
| 17 // When it's time to IPC a new channel endpoint around, we send both the |
| 18 // channel name as well as a base::FileDescriptor, which is itself a special |
| 19 // type that knows how to copy a socket endpoint over IPC. |
| 20 // |
| 21 // In sum, when passing a handle to a channel over IPC, use this data structure |
| 22 // to work on both Windows and POSIX. |
| 23 |
| 24 namespace IPC { |
| 25 |
| 26 struct ChannelHandle { |
| 27 // Note that serialization for this object is defined in the ParamTraits |
| 28 // template specialization in ipc_message_utils.h. |
| 29 std::string name; |
| 30 #if defined(OS_POSIX) |
| 31 base::FileDescriptor socket; |
| 32 #endif |
| 33 |
| 34 ChannelHandle() {} |
| 35 #if defined(OS_POSIX) |
| 36 ChannelHandle(const std::string& n, const base::FileDescriptor& s) |
| 37 : name(n), socket(s) {} |
| 38 #else |
| 39 ChannelHandle(const std::string& n) : name(n) {} |
| 40 #endif |
| 41 }; |
| 42 |
| 43 } // namespace IPC |
| 44 |
| 45 #endif // IPC_IPC_CHANNEL_HANDLE_H_ |
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