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- // 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 BUTIL_FILE_DESCRIPTOR_POSIX_H_
- #define BUTIL_FILE_DESCRIPTOR_POSIX_H_
- #include "butil/files/file.h"
- namespace butil {
- // -----------------------------------------------------------------------------
- // 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) {}
- 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 butil
- #endif // BUTIL_FILE_DESCRIPTOR_POSIX_H_
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