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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_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
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