/*
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* Copyright (C) 2015 The Android Open Source Project
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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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#ifndef _sunxi_unique_fd_h_
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#define _sunxi_unique_fd_h_
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#include <unistd.h>
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namespace sunxi {
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class uniquefd {
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public:
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uniquefd() = default;
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~uniquefd() { reset(); }
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explicit uniquefd(int fd) { reset(fd); }
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uniquefd(uniquefd &&rhs) noexcept { reset(rhs.release()); }
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uniquefd &operator=(uniquefd &&rhs) noexcept {
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int fd = rhs.release();
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reset(fd);
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return *this;
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}
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int get() const { return fd_; }
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operator int() const { return get(); }
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bool operator!() const = delete;
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int release() __attribute__((warn_unused_result)) {
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int ret = fd_;
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fd_ = -1;
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return ret;
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}
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private:
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void reset(int newfd = -1) {
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if (fd_ != -1)
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::close(fd_);
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fd_ = newfd;
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}
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int fd_ = -1;
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uniquefd(const uniquefd&);
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void operator=(const uniquefd&);
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};
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} // namespace sunxi
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#endif
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