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// Copyright Oliver Kowalke 2009.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include "boost/coroutine/detail/coroutine_context.hpp"
#include "boost/coroutine/detail/data.hpp"
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
#if defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable:4355)
#endif
#if defined(BOOST_USE_SEGMENTED_STACKS)
extern "C" {
void __splitstack_getcontext( void * [BOOST_CONTEXT_SEGMENTS]);
void __splitstack_setcontext( void * [BOOST_CONTEXT_SEGMENTS]);
}
#endif
namespace boost {
namespace coroutines {
namespace detail {
coroutine_context::coroutine_context() :
palloc_(),
ctx_( 0)
{}
coroutine_context::coroutine_context( ctx_fn fn, preallocated const& palloc) :
palloc_( palloc),
ctx_( context::detail::make_fcontext( palloc_.sp, palloc_.size, fn) )
{}
coroutine_context::coroutine_context( coroutine_context const& other) :
palloc_( other.palloc_),
ctx_( other.ctx_)
{}
coroutine_context &
coroutine_context::operator=( coroutine_context const& other)
{
if ( this == & other) return * this;
palloc_ = other.palloc_;
ctx_ = other.ctx_;
return * this;
}
void *
coroutine_context::jump( coroutine_context & other, void * param)
{
#if defined(BOOST_USE_SEGMENTED_STACKS)
__splitstack_getcontext( palloc_.sctx.segments_ctx);
__splitstack_setcontext( other.palloc_.sctx.segments_ctx);
#endif
data_t data = { this, param };
context::detail::transfer_t t = context::detail::jump_fcontext( other.ctx_, & data);
data_t * ret = static_cast< data_t * >( t.data);
ret->from->ctx_ = t.fctx;
return ret->data;
}
}}}
#if defined(_MSC_VER)
# pragma warning(pop)
#endif
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
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