15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef BASE_FILE_DESCRIPTOR_POSIX_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BASE_FILE_DESCRIPTOR_POSIX_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ----------------------------------------------------------------------------- 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// We introduct a special structure for file descriptors in order that we are 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// able to use template specialisation to special-case their handling. 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// WARNING: (Chromium only) There are subtleties to consider if serialising 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// these objects over IPC. See comments in ipc/ipc_message_utils.h 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// above the template specialisation for this structure. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ----------------------------------------------------------------------------- 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct FileDescriptor { 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FileDescriptor() 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : fd(-1), 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) auto_close(false) { } 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FileDescriptor(int ifd, bool iauto_close) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : fd(ifd), 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) auto_close(iauto_close) { } 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool operator==(const FileDescriptor& other) const { 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (fd == other.fd && auto_close == other.auto_close); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // A comparison operator so that we can use these as keys in a std::map. 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool operator<(const FileDescriptor& other) const { 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return other.fd < fd; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int fd; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If true, this file descriptor should be closed after it has been used. For 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // example an IPC system might interpret this flag as indicating that the 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // file descriptor it has been given should be closed after use. 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool auto_close; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // BASE_FILE_DESCRIPTOR_POSIX_H_ 46