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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)
#ifndef BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_OBJECT_H
#define BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_OBJECT_H
#include <boost/assert.hpp>
#include <boost/config.hpp>
#include <boost/move/move.hpp>
#include <boost/coroutine/detail/config.hpp>
#include <boost/coroutine/detail/flags.hpp>
#include <boost/coroutine/detail/preallocated.hpp>
#include <boost/coroutine/detail/symmetric_coroutine_impl.hpp>
#include <boost/coroutine/detail/symmetric_coroutine_yield.hpp>
#include <boost/coroutine/exceptions.hpp>
#include <boost/coroutine/stack_context.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace coroutines {
struct stack_context;
namespace detail {
template< typename R, typename Fn, typename StackAllocator >
class symmetric_coroutine_object : public symmetric_coroutine_impl< R >
{
private:
typedef symmetric_coroutine_impl< R > impl_t;
typedef symmetric_coroutine_object< R, Fn, StackAllocator > obj_t;
Fn fn_;
stack_context stack_ctx_;
StackAllocator stack_alloc_;
static void deallocate_( obj_t * obj)
{
stack_context stack_ctx( obj->stack_ctx_);
StackAllocator stack_alloc( obj->stack_alloc_);
obj->unwind_stack();
obj->~obj_t();
stack_alloc.deallocate( stack_ctx);
}
public:
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
symmetric_coroutine_object( Fn fn, attributes const& attrs,
preallocated const& palloc,
StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
impl_t( palloc,
stack_unwind == attrs.do_unwind,
fpu_preserved == attrs.preserve_fpu),
fn_( fn),
stack_ctx_( palloc.sctx),
stack_alloc_( stack_alloc)
{}
#endif
symmetric_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
preallocated const& palloc,
StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
impl_t( palloc,
stack_unwind == attrs.do_unwind,
fpu_preserved == attrs.preserve_fpu),
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
fn_( fn),
#else
fn_( boost::forward< Fn >( fn) ),
#endif
stack_ctx_( palloc.sctx),
stack_alloc_( stack_alloc)
{}
void run( R * r) BOOST_NOEXCEPT
{
BOOST_ASSERT( ! impl_t::unwind_requested() );
impl_t::flags_ |= flag_started;
impl_t::flags_ |= flag_running;
try
{
symmetric_coroutine_yield< R > yc( this, r);
fn_( yc);
}
catch ( forced_unwind const&)
{}
catch (...)
{ std::terminate(); }
impl_t::flags_ |= flag_complete;
impl_t::flags_ &= ~flag_running;
typename impl_t::param_type to;
impl_t::callee_.jump(
impl_t::caller_,
reinterpret_cast< intptr_t >( & to),
impl_t::preserve_fpu() );
BOOST_ASSERT_MSG( false, "coroutine is complete");
}
void destroy()
{ deallocate_( this); }
};
template< typename R, typename Fn, typename StackAllocator >
class symmetric_coroutine_object< R &, Fn, StackAllocator > : public symmetric_coroutine_impl< R & >
{
private:
typedef symmetric_coroutine_impl< R & > impl_t;
typedef symmetric_coroutine_object< R &, Fn, StackAllocator > obj_t;
Fn fn_;
stack_context stack_ctx_;
StackAllocator stack_alloc_;
static void deallocate_( obj_t * obj)
{
stack_context stack_ctx( obj->stack_ctx_);
StackAllocator stack_alloc( obj->stack_alloc_);
obj->unwind_stack();
obj->~obj_t();
stack_alloc.deallocate( stack_ctx);
}
public:
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
symmetric_coroutine_object( Fn fn, attributes const& attrs,
preallocated const& palloc,
StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
impl_t( palloc,
stack_unwind == attrs.do_unwind,
fpu_preserved == attrs.preserve_fpu),
fn_( fn),
stack_ctx_( palloc.sctx),
stack_alloc_( stack_alloc)
{}
#endif
symmetric_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
preallocated const& palloc,
StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
impl_t( palloc,
stack_unwind == attrs.do_unwind,
fpu_preserved == attrs.preserve_fpu),
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
fn_( fn),
#else
fn_( boost::forward< Fn >( fn) ),
#endif
stack_ctx_( palloc.sctx),
stack_alloc_( stack_alloc)
{}
void run( R * r) BOOST_NOEXCEPT
{
BOOST_ASSERT( ! impl_t::unwind_requested() );
impl_t::flags_ |= flag_started;
impl_t::flags_ |= flag_running;
try
{
symmetric_coroutine_yield< R & > yc( this, r);
fn_( yc);
}
catch ( forced_unwind const&)
{}
catch (...)
{ std::terminate(); }
impl_t::flags_ |= flag_complete;
impl_t::flags_ &= ~flag_running;
typename impl_t::param_type to;
impl_t::callee_.jump(
impl_t::caller_,
reinterpret_cast< intptr_t >( & to),
impl_t::preserve_fpu() );
BOOST_ASSERT_MSG( false, "coroutine is complete");
}
void destroy()
{ deallocate_( this); }
};
template< typename Fn, typename StackAllocator >
class symmetric_coroutine_object< void, Fn, StackAllocator > : public symmetric_coroutine_impl< void >
{
private:
typedef symmetric_coroutine_impl< void > impl_t;
typedef symmetric_coroutine_object< void, Fn, StackAllocator > obj_t;
Fn fn_;
stack_context stack_ctx_;
StackAllocator stack_alloc_;
static void deallocate_( obj_t * obj)
{
stack_context stack_ctx( obj->stack_ctx_);
StackAllocator stack_alloc( obj->stack_alloc_);
obj->unwind_stack();
obj->~obj_t();
stack_alloc.deallocate( stack_ctx);
}
public:
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
symmetric_coroutine_object( Fn fn, attributes const& attrs,
preallocated const& palloc,
StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
impl_t( palloc,
stack_unwind == attrs.do_unwind,
fpu_preserved == attrs.preserve_fpu),
fn_( fn),
stack_ctx_( palloc.sctx),
stack_alloc_( stack_alloc)
{}
#endif
symmetric_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
preallocated const& palloc,
StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
impl_t( palloc,
stack_unwind == attrs.do_unwind,
fpu_preserved == attrs.preserve_fpu),
#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
fn_( fn),
#else
fn_( boost::forward< Fn >( fn) ),
#endif
stack_ctx_( palloc.sctx),
stack_alloc_( stack_alloc)
{}
void run() BOOST_NOEXCEPT
{
BOOST_ASSERT( ! impl_t::unwind_requested() );
impl_t::flags_ |= flag_started;
impl_t::flags_ |= flag_running;
try
{
symmetric_coroutine_yield< void > yc( this);
fn_( yc);
}
catch ( forced_unwind const&)
{}
catch (...)
{ std::terminate(); }
impl_t::flags_ |= flag_complete;
impl_t::flags_ &= ~flag_running;
typename impl_t::param_type to;
impl_t::callee_.jump(
impl_t::caller_,
reinterpret_cast< intptr_t >( & to),
impl_t::preserve_fpu() );
BOOST_ASSERT_MSG( false, "coroutine is complete");
}
void destroy()
{ deallocate_( this); }
};
}}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_OBJECT_H
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