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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* shared_fd.h - File descriptor wrapper with shared ownership
*/
#pragma once
#include <memory>
namespace libcamera {
class UniqueFD;
class SharedFD final
{
public:
explicit SharedFD(const int &fd = -1);
explicit SharedFD(int &&fd);
explicit SharedFD(UniqueFD fd);
SharedFD(const SharedFD &other);
SharedFD(SharedFD &&other);
~SharedFD();
SharedFD &operator=(const SharedFD &other);
SharedFD &operator=(SharedFD &&other);
bool isValid() const { return fd_ != nullptr; }
int get() const { return fd_ ? fd_->fd() : -1; }
UniqueFD dup() const;
private:
class Descriptor
{
public:
Descriptor(int fd, bool duplicate);
~Descriptor();
int fd() const { return fd_; }
private:
int fd_;
};
std::shared_ptr<Descriptor> fd_;
};
static inline bool operator==(const SharedFD &lhs, const SharedFD &rhs)
{
return lhs.get() == rhs.get();
}
static inline bool operator!=(const SharedFD &lhs, const SharedFD &rhs)
{
return !(lhs == rhs);
}
} /* namespace libcamera */
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