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// Copyright Oliver Kowalke 2009.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_COROUTINES_DETAIL_COROUTINE_CONTEXT_H
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#define BOOST_COROUTINES_DETAIL_COROUTINE_CONTEXT_H
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#include <cstddef>
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#include <boost/assert.hpp>
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#include <boost/config.hpp>
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#include <boost/context/detail/fcontext.hpp>
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#include <boost/coroutine/detail/config.hpp>
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#include <boost/coroutine/detail/preallocated.hpp>
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#include <boost/coroutine/stack_context.hpp>
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_PREFIX
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#endif
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namespace boost {
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namespace coroutines {
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namespace detail {
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// class hold stack-context and coroutines execution-context
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class BOOST_COROUTINES_DECL coroutine_context
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{
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private:
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template< typename Coro >
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friend void trampoline( context::detail::transfer_t);
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template< typename Coro >
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friend void trampoline_void( context::detail::transfer_t);
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template< typename Coro >
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friend void trampoline_pull( context::detail::transfer_t);
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template< typename Coro >
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friend void trampoline_push( context::detail::transfer_t);
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template< typename Coro >
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friend void trampoline_push_void( context::detail::transfer_t);
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preallocated palloc_;
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context::detail::fcontext_t ctx_;
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public:
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typedef void( * ctx_fn)( context::detail::transfer_t);
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// default ctor represents the current execution-context
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coroutine_context();
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// ctor creates a new execution-context running coroutine-fn `fn`
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// `ctx_` will be allocated on top of the stack managed by parameter
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// `stack_ctx`
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coroutine_context( ctx_fn fn, preallocated const& palloc);
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coroutine_context( coroutine_context const&);
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coroutine_context& operator=( coroutine_context const&);
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void * jump( coroutine_context &, void * = 0);
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stack_context & stack_ctx()
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{ return palloc_.sctx; }
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};
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}}}
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_SUFFIX
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#endif
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#endif // BOOST_COROUTINES_DETAIL_COROUTINE_CONTEXT_H
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