mirror of
https://github.com/matrix-construct/construct
synced 2024-11-09 11:31:11 +01:00
90 lines
2 KiB
C++
90 lines
2 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 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. The
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// full license for this software is available in the LICENSE file.
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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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