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