boost/coroutine/v1/detail/coroutine_base.hpp
// 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_OLD_DETAIL_COROUTINE_BASE_H
#define BOOST_COROUTINES_OLD_DETAIL_COROUTINE_BASE_H
#include <boost/assert.hpp>
#include <boost/config.hpp>
#include <boost/context/fcontext.hpp>
#include <boost/exception_ptr.hpp>
#include <boost/intrusive_ptr.hpp>
#include <boost/type_traits/function_traits.hpp>
#include <boost/utility.hpp>
#include <boost/coroutine/detail/config.hpp>
#include <boost/coroutine/detail/coroutine_context.hpp>
#include <boost/coroutine/detail/flags.hpp>
#include <boost/coroutine/v1/detail/coroutine_base_resume.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace coroutines {
struct stack_context;
namespace detail {
template< typename Signature >
class coroutine_base : private noncopyable,
public coroutine_base_resume<
Signature,
coroutine_base< Signature >,
typename function_traits< Signature >::result_type,
function_traits< Signature >::arity
>
{
public:
typedef intrusive_ptr< coroutine_base > ptr_t;
private:
template< typename X, typename Y, typename Z, int >
friend class coroutine_base_resume;
template< typename X, typename Y, typename Z, typename A, typename B, typename C, int >
friend class coroutine_object;
unsigned int use_count_;
coroutine_context caller_;
coroutine_context callee_;
int flags_;
exception_ptr except_;
protected:
virtual void deallocate_object() = 0;
public:
coroutine_base( coroutine_context::ctx_fn fn, stack_context * stack_ctx,
bool unwind, bool preserve_fpu) :
coroutine_base_resume<
Signature,
coroutine_base< Signature >,
typename function_traits< Signature >::result_type,
function_traits< Signature >::arity
>(),
use_count_( 0),
caller_(),
callee_( fn, stack_ctx),
flags_( 0),
except_()
{
if ( unwind) flags_ |= flag_force_unwind;
if ( preserve_fpu) flags_ |= flag_preserve_fpu;
}
coroutine_base( coroutine_context const& callee, bool unwind, bool preserve_fpu) :
coroutine_base_resume<
Signature,
coroutine_base< Signature >,
typename function_traits< Signature >::result_type,
function_traits< Signature >::arity
>(),
use_count_( 0),
caller_(),
callee_( callee),
flags_( 0),
except_()
{
if ( unwind) flags_ |= flag_force_unwind;
if ( preserve_fpu) flags_ |= flag_preserve_fpu;
}
virtual ~coroutine_base()
{}
bool force_unwind() const BOOST_NOEXCEPT
{ return 0 != ( flags_ & flag_force_unwind); }
bool unwind_requested() const BOOST_NOEXCEPT
{ return 0 != ( flags_ & flag_unwind_stack); }
bool preserve_fpu() const BOOST_NOEXCEPT
{ return 0 != ( flags_ & flag_preserve_fpu); }
bool is_complete() const BOOST_NOEXCEPT
{ return 0 != ( flags_ & flag_complete); }
friend inline void intrusive_ptr_add_ref( coroutine_base * p) BOOST_NOEXCEPT
{ ++p->use_count_; }
friend inline void intrusive_ptr_release( coroutine_base * p) BOOST_NOEXCEPT
{ if ( --p->use_count_ == 0) p->deallocate_object(); }
};
}}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_COROUTINES_OLD_DETAIL_COROUTINE_BASE_H