1 // Copyright (c) 2006-2009 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 BASE_FILE_DESCRIPTOR_POSIX_H_ 6 #define BASE_FILE_DESCRIPTOR_POSIX_H_ 7 8 #include "base/files/file.h" 9 10 namespace base { 11 12 // ----------------------------------------------------------------------------- 13 // We introduct a special structure for file descriptors in order that we are 14 // able to use template specialisation to special-case their handling. 15 // 16 // WARNING: (Chromium only) There are subtleties to consider if serialising 17 // these objects over IPC. See comments in ipc/ipc_message_utils.h 18 // above the template specialisation for this structure. 19 // ----------------------------------------------------------------------------- 20 struct FileDescriptor { 21 FileDescriptor() : fd(-1), auto_close(false) {} 22 23 FileDescriptor(int ifd, bool iauto_close) : fd(ifd), auto_close(iauto_close) { 24 } 25 26 FileDescriptor(File file) : fd(file.TakePlatformFile()), auto_close(true) {} 27 28 bool operator==(const FileDescriptor& other) const { 29 return (fd == other.fd && auto_close == other.auto_close); 30 } 31 32 bool operator!=(const FileDescriptor& other) const { 33 return !operator==(other); 34 } 35 36 // A comparison operator so that we can use these as keys in a std::map. 37 bool operator<(const FileDescriptor& other) const { 38 return other.fd < fd; 39 } 40 41 int fd; 42 // If true, this file descriptor should be closed after it has been used. For 43 // example an IPC system might interpret this flag as indicating that the 44 // file descriptor it has been given should be closed after use. 45 bool auto_close; 46 }; 47 48 } // namespace base 49 50 #endif // BASE_FILE_DESCRIPTOR_POSIX_H_ 51
