mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-12-01 01:36:09 +03:00
60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
// 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 BASE_FILE_DESCRIPTOR_POSIX_H_
|
|
#define BASE_FILE_DESCRIPTOR_POSIX_H_
|
|
|
|
#include "base/files/file.h"
|
|
#include "base/files/scoped_file.h"
|
|
|
|
namespace base {
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// We introduct a special structure for file descriptors in order that we are
|
|
// able to use template specialisation to special-case their handling.
|
|
//
|
|
// IMPORTANT: This is primarily intended for use when sending file descriptors
|
|
// over IPC. Even if |auto_close| is true, base::FileDescriptor does NOT close()
|
|
// |fd| when going out of scope. Instead, a consumer of a base::FileDescriptor
|
|
// must invoke close() on |fd| if |auto_close| is true.
|
|
//
|
|
// In the case of IPC, the the IPC subsystem knows to close() |fd| after sending
|
|
// a message that contains a base::FileDescriptor if auto_close == true. On the
|
|
// other end, the receiver must make sure to close() |fd| after it has finished
|
|
// processing the IPC message. See the IPC::ParamTraits<> specialization in
|
|
// ipc/ipc_message_utils.h for all the details.
|
|
// -----------------------------------------------------------------------------
|
|
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) {}
|
|
explicit FileDescriptor(ScopedFD fd) : fd(fd.release()), 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 base
|
|
|
|
#endif // BASE_FILE_DESCRIPTOR_POSIX_H_
|