/*
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* unique_fd.h - A unique file descriptor implementation
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*
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* Copyright (c) 2021 Rockchip Electronics Co., Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Author: Cody Xie <cody.xie@rock-chips.com>
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*/
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#ifndef _UNIQUE_FD_H_
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#define _UNIQUE_FD_H_
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#include <unistd.h>
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namespace XCam {
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class UniqueFd final {
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public:
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UniqueFd() : fd_(-1) {}
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explicit UniqueFd(int fd) : fd_(fd) {}
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UniqueFd(const UniqueFd&) = delete;
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UniqueFd& operator=(const UniqueFd&) = delete;
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UniqueFd& operator=(UniqueFd&& rhs) {
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fd_ = Set(rhs.Release());
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return *this;
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}
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~UniqueFd() {
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if (fd_ > 0) {
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close(fd_);
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}
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}
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int Release() {
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int old_fd = fd_;
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fd_ = -1;
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return old_fd;
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}
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int Get() const { return fd_; }
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int Set(int fd) {
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if (fd_ >= 0) {
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close(fd_);
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}
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fd_ = fd;
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return fd_;
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}
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private:
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int fd_;
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};
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}; // namespace XCam
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#endif // _UNIQUE_FD_H_
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