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construct/include/ircd/mode_lease.h
2016-09-09 16:17:01 -07:00

87 lines
2.5 KiB
C++

/*
* Copyright (C) 2016 Charybdis Development Team
* Copyright (C) 2016 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#define HAVE_IRCD_MODE_LEASE_H
#ifdef __cplusplus
namespace ircd {
template<class T,
mode_table<T> &table>
class mode_lease
{
using mask_t = typename mode_table<T>::mask_t;
char c = '\0';
virtual void release() noexcept { table[c] = { 0 }; }
public:
explicit operator const char &() const { return c; }
operator const mask_t &() const { return static_cast<const mask_t &>(table[c]); }
bool operator!() const { return !c; }
template<class... args> mode_lease(const char &c, args&&...);
mode_lease() = default;
mode_lease(mode_lease &&) noexcept;
mode_lease(const mode_lease &) = delete;
virtual ~mode_lease() noexcept;
};
template<class T,
mode_table<T> &table>
template<class... args>
mode_lease<T, table>::mode_lease(const char &c,
args&&... a)
:c(c)
{
if(!c)
return;
if(!!table[c])
throw mode_filled("Character [%c] is already leased", c);
table[c] = { find_slot(table), std::forward<args>(a)... };
}
template<class T,
mode_table<T> &table>
mode_lease<T, table>::mode_lease(mode_lease &&other)
noexcept
:c(other.c)
{
other.c = '\0';
}
template<class T,
mode_table<T> &table>
mode_lease<T, table>::~mode_lease()
noexcept
{
if(!c)
return;
release();
}
} // namespace ircd
#endif // __cplusplus