|  | // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style license that can be | 
|  | // found in the LICENSE file. | 
|  |  | 
|  | #ifndef BASE_FILE_DESCRIPTOR_POSIX_H_ | 
|  | #define BASE_FILE_DESCRIPTOR_POSIX_H_ | 
|  |  | 
|  | #include "base/files/file.h" | 
|  | #include "base/files/scoped_file.h" | 
|  |  | 
|  | namespace base { | 
|  |  | 
|  | // ----------------------------------------------------------------------------- | 
|  | // We introduct a special structure for file descriptors in order that we are | 
|  | // able to use template specialisation to special-case their handling. | 
|  | // | 
|  | // WARNING: (Chromium only) There are subtleties to consider if serialising | 
|  | // these objects over IPC. See comments in ipc/ipc_message_utils.h | 
|  | // above the template specialisation for this structure. | 
|  | // ----------------------------------------------------------------------------- | 
|  | struct FileDescriptor { | 
|  | FileDescriptor() : fd(-1), auto_close(false) {} | 
|  |  | 
|  | FileDescriptor(int ifd, bool iauto_close) : fd(ifd), auto_close(iauto_close) { | 
|  | } | 
|  |  | 
|  | FileDescriptor(File file) : fd(file.TakePlatformFile()), auto_close(true) {} | 
|  | explicit FileDescriptor(ScopedFD fd) : fd(fd.release()), auto_close(true) {} | 
|  |  | 
|  | bool operator==(const FileDescriptor& other) const { | 
|  | return (fd == other.fd && auto_close == other.auto_close); | 
|  | } | 
|  |  | 
|  | bool operator!=(const FileDescriptor& other) const { | 
|  | return !operator==(other); | 
|  | } | 
|  |  | 
|  | // A comparison operator so that we can use these as keys in a std::map. | 
|  | bool operator<(const FileDescriptor& other) const { | 
|  | return other.fd < fd; | 
|  | } | 
|  |  | 
|  | int fd; | 
|  | // If true, this file descriptor should be closed after it has been used. For | 
|  | // example an IPC system might interpret this flag as indicating that the | 
|  | // file descriptor it has been given should be closed after use. | 
|  | bool auto_close; | 
|  | }; | 
|  |  | 
|  | }  // namespace base | 
|  |  | 
|  | #endif  // BASE_FILE_DESCRIPTOR_POSIX_H_ |