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construct/include/ircd/ctx/unlock_guard.h
2018-08-26 20:46:59 -07:00

48 lines
1.1 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_CTX_UNLOCK_GUARD_H
namespace ircd::ctx
{
template<class lockable> struct unlock_guard;
}
/// Inverse of std::lock_guard<>
template<class lockable>
struct ircd::ctx::unlock_guard
{
lockable &l;
unlock_guard(lockable &l);
unlock_guard(unlock_guard &&) = delete;
unlock_guard(const unlock_guard &) = delete;
~unlock_guard() noexcept;
};
namespace ircd
{
using ctx::unlock_guard;
}
template<class lockable>
ircd::ctx::unlock_guard<lockable>::unlock_guard(lockable &l)
:l{l}
{
l.unlock();
}
template<class lockable>
ircd::ctx::unlock_guard<lockable>::~unlock_guard()
noexcept
{
l.lock();
}