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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),
- 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),
- #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_,
- & to);
- 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),
- 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),
- #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_,
- & to);
- 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),
- 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),
- #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_,
- & to);
- 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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