libcruft-util/cruft/util/posix/flock.cpp

/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright 2021-2022, Danny Robson <danny@nerdcruft.net>
 */

#include "./flock.hpp"
#include "./except.hpp"
#include "../platform.hpp"

#include <sys/file.h>

using flock_  = cruft::posix::flock;


#ifndef PLATFORM_WIN32
///////////////////////////////////////////////////////////////////////////////
flock_::flock (cruft::posix::fd const &_fd, int const _operation)
    : flock (_fd.dup (), _operation)
{ ; }


//-----------------------------------------------------------------------------
flock_::flock (
    cruft::posix::fd &&_fd,
    int operation
)
    : m_fd (std::move (_fd))
{
    cruft::posix::error::try_code (
        ::flock (m_fd.native (), operation)
    );
}


//-----------------------------------------------------------------------------
flock_::flock (flock_ &&rhs) noexcept
    : m_fd (std::move (rhs.m_fd))
{ ; }


//-----------------------------------------------------------------------------
flock_::~flock ()
{
    if (m_fd.native () < 0)
        return;

    cruft::posix::error::try_code (
        ::flock (m_fd.native (), LOCK_UN)
    );
}


//-----------------------------------------------------------------------------
cruft::posix::fd const&
flock_::native (void) const
{
    return m_fd;
}
#endif