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