[ceph.git] / ceph / src / boost / libs / coroutine / include / boost / coroutine / detail / symmetric_coroutine_object.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_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
Commit	Line	Data
7c673cae FG	1
	2	// Copyright Oliver Kowalke 2009.
	3	// Distributed under the Boost Software License, Version 1.0.
	4	// (See accompanying file LICENSE_1_0.txt or copy at
	5	// http://www.boost.org/LICENSE_1_0.txt)
	6
	7	#ifndef BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_OBJECT_H
	8	#define BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_OBJECT_H
	9
	10	#include <boost/assert.hpp>
	11	#include <boost/config.hpp>
	12	#include <boost/move/move.hpp>
	13
	14	#include <boost/coroutine/detail/config.hpp>
	15	#include <boost/coroutine/detail/flags.hpp>
	16	#include <boost/coroutine/detail/preallocated.hpp>
	17	#include <boost/coroutine/detail/symmetric_coroutine_impl.hpp>
	18	#include <boost/coroutine/detail/symmetric_coroutine_yield.hpp>
	19	#include <boost/coroutine/exceptions.hpp>
	20	#include <boost/coroutine/stack_context.hpp>
	21
	22	#ifdef BOOST_HAS_ABI_HEADERS
	23	# include BOOST_ABI_PREFIX
	24	#endif
	25
	26	namespace boost {
	27	namespace coroutines {
	28
	29	struct stack_context;
	30
	31	namespace detail {
	32
	33	template< typename R, typename Fn, typename StackAllocator >
	34	class symmetric_coroutine_object : public symmetric_coroutine_impl< R >
	35	{
	36	private:
	37	typedef symmetric_coroutine_impl< R > impl_t;
	38	typedef symmetric_coroutine_object< R, Fn, StackAllocator > obj_t;
	39
	40	Fn fn_;
	41	stack_context stack_ctx_;
	42	StackAllocator stack_alloc_;
	43
	44	static void deallocate_( obj_t * obj)
	45	{
	46	stack_context stack_ctx( obj->stack_ctx_);
	47	StackAllocator stack_alloc( obj->stack_alloc_);
	48	obj->unwind_stack();
	49	obj->~obj_t();
	50	stack_alloc.deallocate( stack_ctx);
	51	}
	52
	53	public:
	54	#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
	55	symmetric_coroutine_object( Fn fn, attributes const& attrs,
	56	preallocated const& palloc,
	57	StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
	58	impl_t( palloc,
	59	stack_unwind == attrs.do_unwind),
	60	fn_( fn),
	61	stack_ctx_( palloc.sctx),
	62	stack_alloc_( stack_alloc)
	63	{}
	64	#endif
65
66	symmetric_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
67	preallocated const& palloc,
68	StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
69	impl_t( palloc,
70	stack_unwind == attrs.do_unwind),
71	#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
72	fn_( fn),
73	#else
74	fn_( boost::forward< Fn >( fn) ),
75	#endif
76	stack_ctx_( palloc.sctx),
77	stack_alloc_( stack_alloc)
78	{}
79
80	void run( R * r) BOOST_NOEXCEPT
81	{
82	BOOST_ASSERT( ! impl_t::unwind_requested() );
83
84	impl_t::flags_ \|= flag_started;
85	impl_t::flags_ \|= flag_running;
86	try
87	{
88	symmetric_coroutine_yield< R > yc( this, r);
89	fn_( yc);
90	}
91	catch ( forced_unwind const&)
92	{}
93	catch (...)
94	{ std::terminate(); }
95
96	impl_t::flags_ \|= flag_complete;
97	impl_t::flags_ &= ~flag_running;
98	typename impl_t::param_type to;
99	impl_t::callee_.jump(
100	impl_t::caller_,
101	& to);
102	BOOST_ASSERT_MSG( false, "coroutine is complete");
103	}
104
105	void destroy()
106	{ deallocate_( this); }
107	};
108
109	template< typename R, typename Fn, typename StackAllocator >
110	class symmetric_coroutine_object< R &, Fn, StackAllocator > : public symmetric_coroutine_impl< R & >
111	{
112	private:
113	typedef symmetric_coroutine_impl< R & > impl_t;
114	typedef symmetric_coroutine_object< R &, Fn, StackAllocator > obj_t;
115
116	Fn fn_;
117	stack_context stack_ctx_;
118	StackAllocator stack_alloc_;
119
120	static void deallocate_( obj_t * obj)
121	{
122	stack_context stack_ctx( obj->stack_ctx_);
123	StackAllocator stack_alloc( obj->stack_alloc_);
124	obj->unwind_stack();
125	obj->~obj_t();
126	stack_alloc.deallocate( stack_ctx);
127	}
128
129	public:
130	#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
131	symmetric_coroutine_object( Fn fn, attributes const& attrs,
132	preallocated const& palloc,
133	StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
134	impl_t( palloc,
135	stack_unwind == attrs.do_unwind),
136	fn_( fn),
137	stack_ctx_( palloc.sctx),
138	stack_alloc_( stack_alloc)
139	{}
140	#endif
141
142	symmetric_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
143	preallocated const& palloc,
144	StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
145	impl_t( palloc,
146	stack_unwind == attrs.do_unwind),
147	#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
148	fn_( fn),
149	#else
150	fn_( boost::forward< Fn >( fn) ),
151	#endif
152	stack_ctx_( palloc.sctx),
153	stack_alloc_( stack_alloc)
154	{}
155
156	void run( R * r) BOOST_NOEXCEPT
157	{
158	BOOST_ASSERT( ! impl_t::unwind_requested() );
159
160	impl_t::flags_ \|= flag_started;
161	impl_t::flags_ \|= flag_running;
162	try
163	{
164	symmetric_coroutine_yield< R & > yc( this, r);
165	fn_( yc);
166	}
167	catch ( forced_unwind const&)
168	{}
169	catch (...)
170	{ std::terminate(); }
171
172	impl_t::flags_ \|= flag_complete;
173	impl_t::flags_ &= ~flag_running;
174	typename impl_t::param_type to;
175	impl_t::callee_.jump(
176	impl_t::caller_,
177	& to);
178	BOOST_ASSERT_MSG( false, "coroutine is complete");
179	}
180
181	void destroy()
182	{ deallocate_( this); }
183	};
184
185	template< typename Fn, typename StackAllocator >
186	class symmetric_coroutine_object< void, Fn, StackAllocator > : public symmetric_coroutine_impl< void >
187	{
188	private:
189	typedef symmetric_coroutine_impl< void > impl_t;
190	typedef symmetric_coroutine_object< void, Fn, StackAllocator > obj_t;
191
192	Fn fn_;
193	stack_context stack_ctx_;
194	StackAllocator stack_alloc_;
195
196	static void deallocate_( obj_t * obj)
197	{
198	stack_context stack_ctx( obj->stack_ctx_);
199	StackAllocator stack_alloc( obj->stack_alloc_);
200	obj->unwind_stack();
201	obj->~obj_t();
202	stack_alloc.deallocate( stack_ctx);
203	}
204
205	public:
206	#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
207	symmetric_coroutine_object( Fn fn, attributes const& attrs,
208	preallocated const& palloc,
209	StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
210	impl_t( palloc,
211	stack_unwind == attrs.do_unwind),
212	fn_( fn),
213	stack_ctx_( palloc.sctx),
214	stack_alloc_( stack_alloc)
215	{}
216	#endif
217
218	symmetric_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
219	preallocated const& palloc,
220	StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
221	impl_t( palloc,
222	stack_unwind == attrs.do_unwind),
223	#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
224	fn_( fn),
225	#else
226	fn_( boost::forward< Fn >( fn) ),
227	#endif
228	stack_ctx_( palloc.sctx),
229	stack_alloc_( stack_alloc)
230	{}
231
232	void run() BOOST_NOEXCEPT
233	{
234	BOOST_ASSERT( ! impl_t::unwind_requested() );
235
236	impl_t::flags_ \|= flag_started;
237	impl_t::flags_ \|= flag_running;
238	try
239	{
240	symmetric_coroutine_yield< void > yc( this);
241	fn_( yc);
242	}
243	catch ( forced_unwind const&)
244	{}
245	catch (...)
246	{ std::terminate(); }
247
248	impl_t::flags_ \|= flag_complete;
249	impl_t::flags_ &= ~flag_running;
250	typename impl_t::param_type to;
251	impl_t::callee_.jump(
252	impl_t::caller_,
253	& to);
254	BOOST_ASSERT_MSG( false, "coroutine is complete");
255	}
256
257	void destroy()
258	{ deallocate_( this); }
259	};
260
261	}}}
262
263	#ifdef BOOST_HAS_ABI_HEADERS
264	# include BOOST_ABI_SUFFIX
265	#endif
266
267	#endif // BOOST_COROUTINES_DETAIL_SYMMETRIC_COROUTINE_OBJECT_H