boost/coroutine/detail/symmetric_coroutine_call.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_DETAIL_SYMMETRIC_COROUTINE_CALL_H
#define BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_CALL_H
#include <boost/assert.hpp>
#include <boost/config.hpp>
#include <boost/move/move.hpp>
#include <boost/utility/explicit_operator_bool.hpp>
#include <boost/coroutine/attributes.hpp>
#include <boost/coroutine/detail/config.hpp>
#include <boost/coroutine/detail/preallocated.hpp>
#include <boost/coroutine/detail/symmetric_coroutine_impl.hpp>
#include <boost/coroutine/detail/symmetric_coroutine_object.hpp>
#include <boost/coroutine/detail/symmetric_coroutine_yield.hpp>
#include <boost/coroutine/stack_allocator.hpp>
#include <boost/coroutine/stack_context.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace coroutines {
namespace detail {
template< typename Arg >
class symmetric_coroutine_call
{
private:
template< typename X >
friend class symmetric_coroutine_yield;
typedef symmetric_coroutine_impl< Arg > impl_type;
BOOST_MOVABLE_BUT_NOT_COPYABLE( symmetric_coroutine_call)
struct dummy {};
impl_type * impl_;
public:
typedef Arg value_type;
typedef symmetric_coroutine_yield< Arg > yield_type;
symmetric_coroutine_call() BOOST_NOEXCEPT :
impl_( 0)
{}
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
# ifdef BOOST_MSVC
typedef void ( * coroutine_fn)( yield_type &);
explicit symmetric_coroutine_call( coroutine_fn fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, coroutine_fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< coroutine_fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename StackAllocator >
explicit symmetric_coroutine_call( coroutine_fn fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, coroutine_fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< coroutine_fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
# endif
template< typename Fn >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< Fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< Fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
#else
template< typename Fn >
explicit symmetric_coroutine_call( Fn fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( Fn fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
#endif
~symmetric_coroutine_call()
{
if ( 0 != impl_)
{
impl_->destroy();
impl_ = 0;
}
}
symmetric_coroutine_call( BOOST_RV_REF( symmetric_coroutine_call) other) BOOST_NOEXCEPT :
impl_( 0)
{ swap( other); }
symmetric_coroutine_call & operator=( BOOST_RV_REF( symmetric_coroutine_call) other) BOOST_NOEXCEPT
{
symmetric_coroutine_call tmp( boost::move( other) );
swap( tmp);
return * this;
}
BOOST_EXPLICIT_OPERATOR_BOOL();
bool operator!() const BOOST_NOEXCEPT
{ return 0 == impl_ || impl_->is_complete() || impl_->is_running(); }
void swap( symmetric_coroutine_call & other) BOOST_NOEXCEPT
{ std::swap( impl_, other.impl_); }
symmetric_coroutine_call & operator()( Arg arg) BOOST_NOEXCEPT
{
BOOST_ASSERT( * this);
impl_->resume( arg);
return * this;
}
};
template< typename Arg >
class symmetric_coroutine_call< Arg & >
{
private:
template< typename X >
friend class symmetric_coroutine_yield;
typedef symmetric_coroutine_impl< Arg & > impl_type;
BOOST_MOVABLE_BUT_NOT_COPYABLE( symmetric_coroutine_call)
struct dummy {};
impl_type * impl_;
public:
typedef Arg value_type;
typedef symmetric_coroutine_yield< Arg & > yield_type;
symmetric_coroutine_call() BOOST_NOEXCEPT :
impl_( 0)
{}
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
# ifdef BOOST_MSVC
typedef void ( * coroutine_fn)( yield_type &);
explicit symmetric_coroutine_call( coroutine_fn fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, coroutine_fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< coroutine_fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename StackAllocator >
explicit symmetric_coroutine_call( coroutine_fn fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, coroutine_fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< coroutine_fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
# endif
template< typename Fn >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< Fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< Fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
#else
template< typename Fn >
explicit symmetric_coroutine_call( Fn fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( Fn fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< Arg &, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
#endif
~symmetric_coroutine_call()
{
if ( 0 != impl_)
{
impl_->destroy();
impl_ = 0;
}
}
symmetric_coroutine_call( BOOST_RV_REF( symmetric_coroutine_call) other) BOOST_NOEXCEPT :
impl_( 0)
{ swap( other); }
symmetric_coroutine_call & operator=( BOOST_RV_REF( symmetric_coroutine_call) other) BOOST_NOEXCEPT
{
symmetric_coroutine_call tmp( boost::move( other) );
swap( tmp);
return * this;
}
BOOST_EXPLICIT_OPERATOR_BOOL();
bool operator!() const BOOST_NOEXCEPT
{ return 0 == impl_ || impl_->is_complete() || impl_->is_running(); }
void swap( symmetric_coroutine_call & other) BOOST_NOEXCEPT
{ std::swap( impl_, other.impl_); }
symmetric_coroutine_call & operator()( Arg & arg) BOOST_NOEXCEPT
{
BOOST_ASSERT( * this);
impl_->resume( arg);
return * this;
}
};
template<>
class symmetric_coroutine_call< void >
{
private:
template< typename X >
friend class symmetric_coroutine_yield;
typedef symmetric_coroutine_impl< void > impl_type;
BOOST_MOVABLE_BUT_NOT_COPYABLE( symmetric_coroutine_call)
struct dummy {};
impl_type * impl_;
public:
typedef void value_type;
typedef symmetric_coroutine_yield< void > yield_type;
symmetric_coroutine_call() BOOST_NOEXCEPT :
impl_( 0)
{}
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
# ifdef BOOST_MSVC
typedef void ( * coroutine_fn)( yield_type &);
explicit symmetric_coroutine_call( coroutine_fn fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, coroutine_fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< coroutine_fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename StackAllocator >
explicit symmetric_coroutine_call( coroutine_fn fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, coroutine_fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< coroutine_fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
# endif
template< typename Fn >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< Fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
boost::forward< Fn >( fn), attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
#else
template< typename Fn >
explicit symmetric_coroutine_call( Fn fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( Fn fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs = attributes(),
stack_allocator stack_alloc = stack_allocator() ) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, Fn, stack_allocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
template< typename Fn, typename StackAllocator >
explicit symmetric_coroutine_call( BOOST_RV_REF( Fn) fn,
attributes const& attrs,
StackAllocator stack_alloc) :
impl_( 0)
{
// create a stack-context
stack_context stack_ctx;
// allocate the coroutine-stack
stack_alloc.allocate( stack_ctx, attrs.size);
BOOST_ASSERT( 0 != stack_ctx.sp);
// typedef of internal coroutine-type
typedef symmetric_coroutine_object< void, Fn, StackAllocator > object_t;
// reserve space on top of coroutine-stack for internal coroutine-type
std::size_t size = stack_ctx.size - sizeof( object_t);
BOOST_ASSERT( 0 != size);
void * sp = static_cast< char * >( stack_ctx.sp) - sizeof( object_t);
BOOST_ASSERT( 0 != sp);
// placement new for internal coroutine
impl_ = new ( sp) object_t(
fn, attrs, preallocated( sp, size, stack_ctx), stack_alloc);
BOOST_ASSERT( impl_);
}
#endif
~symmetric_coroutine_call()
{
if ( 0 != impl_)
{
impl_->destroy();
impl_ = 0;
}
}
inline symmetric_coroutine_call( BOOST_RV_REF( symmetric_coroutine_call) other) BOOST_NOEXCEPT :
impl_( 0)
{ swap( other); }
inline symmetric_coroutine_call & operator=( BOOST_RV_REF( symmetric_coroutine_call) other) BOOST_NOEXCEPT
{
symmetric_coroutine_call tmp( boost::move( other) );
swap( tmp);
return * this;
}
BOOST_EXPLICIT_OPERATOR_BOOL();
inline bool operator!() const BOOST_NOEXCEPT
{ return 0 == impl_ || impl_->is_complete() || impl_->is_running(); }
inline void swap( symmetric_coroutine_call & other) BOOST_NOEXCEPT
{ std::swap( impl_, other.impl_); }
inline symmetric_coroutine_call & operator()() BOOST_NOEXCEPT
{
BOOST_ASSERT( * this);
impl_->resume();
return * this;
}
};
template< typename Arg >
void swap( symmetric_coroutine_call< Arg > & l,
symmetric_coroutine_call< Arg > & r)
{ l.swap( r); }
}}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_CALL_H