mirror of
https://github.com/matrix-construct/construct
synced 2024-08-26 19:35:17 +02:00
75 lines
2 KiB
C
75 lines
2 KiB
C
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/*
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* charybdis: oh just a little chat server
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* ctx.h: userland context switching (stackful coroutines)
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*
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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_H
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#ifdef __cplusplus
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namespace ircd {
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namespace ctx {
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IRCD_EXCEPTION(ircd::error, error)
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IRCD_EXCEPTION(error, interrupted)
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const auto DEFAULT_STACK_SIZE = 64_KiB;
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struct ctx;
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class context
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{
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using ptr = std::unique_ptr<ctx>;
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using function = std::function<void ()>;
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ptr c;
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public:
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void join();
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ctx *detach();
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context &swap(context &) noexcept;
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context(const size_t &stack_size, const function &);
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context(const function &);
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context(context &&) noexcept = default;
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context(const context &) = delete;
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~context() noexcept;
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};
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extern __thread struct ctx *current;
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void swap(context &a, context &b) noexcept;
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inline
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ctx &cur()
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{
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assert(current);
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return *current;
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}
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} // namespace ctx
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using ctx::cur;
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using ctx::context;
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} // namespace ircd
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#endif // __cplusplus
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