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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_AUTO_FD_H_
#define ANDROID_AUTO_FD_H_
#include <unistd.h>
namespace android {
class UniqueFd {
public:
UniqueFd() = default;
UniqueFd(int fd) : fd_(fd) {
}
UniqueFd(UniqueFd &&rhs) {
fd_ = rhs.fd_;
rhs.fd_ = -1;
}
UniqueFd &operator=(UniqueFd &&rhs) {
Set(rhs.Release());
return *this;
}
~UniqueFd() {
if (fd_ >= 0)
close(fd_);
}
int Release() {
int old_fd = fd_;
fd_ = -1;
return old_fd;
}
int Set(int fd) {
if (fd_ >= 0)
close(fd_);
fd_ = fd;
return fd_;
}
void Close() {
if (fd_ >= 0)
close(fd_);
fd_ = -1;
}
int get() const {
return fd_;
}
private:
int fd_ = -1;
};
struct OutputFd {
OutputFd() = default;
OutputFd(int *fd) : fd_(fd) {
}
OutputFd(OutputFd &&rhs) {
fd_ = rhs.fd_;
rhs.fd_ = NULL;
}
OutputFd &operator=(OutputFd &&rhs) {
fd_ = rhs.fd_;
rhs.fd_ = NULL;
return *this;
}
int Set(int fd) {
if (*fd_ >= 0)
close(*fd_);
*fd_ = fd;
return fd;
}
int get() {
return *fd_;
}
operator bool() const {
return fd_ != NULL;
}
private:
int *fd_ = NULL;
};
}
#endif
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