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construct/include/ircd/ctx/scope_notify.h
2019-03-21 16:46:04 -07:00

102 lines
2.2 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2019 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_SCOPE_NOTIFY_H
namespace ircd::ctx
{
struct scope_notify;
}
struct ircd::ctx::scope_notify
{
IRCD_OVERLOAD(all)
IRCD_OVERLOAD(one)
dock *d {nullptr};
bool _all {false};
bool _one {false};
scope_notify(dock &d);
scope_notify(dock &d, one_t);
scope_notify(dock &d, all_t);
scope_notify(scope_notify &&) noexcept;
scope_notify(const scope_notify &) = delete;
scope_notify &operator=(scope_notify &&) noexcept;
scope_notify &operator=(const scope_notify &) = delete;
~scope_notify() noexcept;
};
namespace ircd
{
using ctx::scope_notify;
}
/// Notify the dock at destruction time with dock::notify() (reminder, that
/// is a single notify with fairness).
inline
ircd::ctx::scope_notify::scope_notify(dock &d)
:d{&d}
{}
/// Notify the dock at destruction time with a notify_one() (reminder, that
/// is a single notify of the first ctx waiting in the dock only).
inline
ircd::ctx::scope_notify::scope_notify(dock &d,
one_t)
:d{&d}
,_one{true}
{}
/// Notify the dock at destruction time with a notify_all().
inline
ircd::ctx::scope_notify::scope_notify(dock &d,
all_t)
:d{&d}
,_all{true}
{}
inline
ircd::ctx::scope_notify::scope_notify(scope_notify &&other)
noexcept
:d{std::move(other.d)}
,_all{std::move(other._all)}
,_one{std::move(other._one)}
{
other.d = nullptr;
}
inline
ircd::ctx::scope_notify &
ircd::ctx::scope_notify::operator=(scope_notify &&other)
noexcept
{
this->~scope_notify();
d = std::move(other.d);
_all = std::move(other._all);
_one = std::move(other._one);
other.d = nullptr;
return *this;
}
inline
ircd::ctx::scope_notify::~scope_notify()
noexcept
{
if(!d)
return;
else if(_all)
d->notify_all();
else if(_one)
d->notify_one();
else
d->notify();
}