ccdaf8ec90
This introduces UniqueFD. It acts like unique_ptr to a file descriptor. Signed-off-by: Hirokazu Honda <hiroh@chromium.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
70 lines
910 B
C++
70 lines
910 B
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2021, Google Inc.
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*
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* unique_fd.h - File descriptor wrapper that owns a file descriptor.
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*/
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#pragma once
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#include <utility>
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#include <libcamera/base/class.h>
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#include <libcamera/base/compiler.h>
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namespace libcamera {
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class UniqueFD final
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{
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public:
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UniqueFD()
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: fd_(-1)
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{
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}
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explicit UniqueFD(int fd)
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: fd_(fd)
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{
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}
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UniqueFD(UniqueFD &&other)
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: fd_(other.release())
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{
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}
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~UniqueFD()
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{
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reset();
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}
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UniqueFD &operator=(UniqueFD &&other)
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{
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reset(other.release());
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return *this;
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}
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__nodiscard int release()
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{
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int fd = fd_;
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fd_ = -1;
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return fd;
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}
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void reset(int fd = -1);
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void swap(UniqueFD &other)
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{
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std::swap(fd_, other.fd_);
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}
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int get() const { return fd_; }
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bool isValid() const { return fd_ >= 0; }
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private:
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LIBCAMERA_DISABLE_COPY(UniqueFD)
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int fd_;
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};
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} /* namespace libcamera */
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