mirror of
https://github.com/matrix-construct/construct
synced 2024-07-03 01:09:05 +02:00
102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#define HAVE_IRCD_CTX_SHARED_STATE_H
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namespace ircd::ctx
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{
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struct shared_state_base;
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template<class T = void> struct shared_state;
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template<> struct shared_state<void>;
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}
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struct ircd::ctx::shared_state_base
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{
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dock cond;
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std::exception_ptr eptr;
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uint promise_refcnt {0};
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bool finished {false};
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void reset();
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};
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template<class T>
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struct ircd::ctx::shared_state
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:shared_state_base
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,std::enable_shared_from_this<shared_state<T>>
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{
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using value_type = T;
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using pointer_type = T *;
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using reference_type = T &;
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T val;
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std::shared_ptr<const shared_state<T>> share() const;
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std::shared_ptr<shared_state<T>> share();
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};
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template<>
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struct ircd::ctx::shared_state<void>
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:shared_state_base
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,std::enable_shared_from_this<shared_state<void>>
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{
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using value_type = void;
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std::shared_ptr<const shared_state<void>> share() const;
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std::shared_ptr<shared_state<void>> share();
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};
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inline std::shared_ptr<ircd::ctx::shared_state<void>>
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ircd::ctx::shared_state<void>::share()
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{
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return this->shared_from_this();
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}
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template<class T>
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std::shared_ptr<ircd::ctx::shared_state<T>>
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ircd::ctx::shared_state<T>::share()
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{
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return this->shared_from_this();
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}
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inline std::shared_ptr<const ircd::ctx::shared_state<void>>
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ircd::ctx::shared_state<void>::share()
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const
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{
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return this->shared_from_this();
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}
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template<class T>
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std::shared_ptr<const ircd::ctx::shared_state<T>>
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ircd::ctx::shared_state<T>::share()
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const
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{
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return this->shared_from_this();
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}
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inline void
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ircd::ctx::shared_state_base::reset()
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{
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eptr = nullptr;
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finished = false;
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}
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