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[ceph.git] / ceph / src / boost / libs / coroutine / include / boost / coroutine / detail / pull_coroutine_object.hpp
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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_PULL_COROUTINE_OBJECT_H
8#define BOOST_COROUTINES_DETAIL_PULL_COROUTINE_OBJECT_H
9
10#include <boost/assert.hpp>
11#include <boost/config.hpp>
12#include <boost/cstdint.hpp>
13#include <boost/exception_ptr.hpp>
14#include <boost/move/move.hpp>
15
16#include <boost/coroutine/detail/config.hpp>
17#include <boost/coroutine/detail/coroutine_context.hpp>
18#include <boost/coroutine/detail/flags.hpp>
19#include <boost/coroutine/detail/preallocated.hpp>
20#include <boost/coroutine/detail/pull_coroutine_impl.hpp>
21#include <boost/coroutine/detail/trampoline_pull.hpp>
22#include <boost/coroutine/exceptions.hpp>
23#include <boost/coroutine/flags.hpp>
24#include <boost/coroutine/stack_context.hpp>
25
26#ifdef BOOST_HAS_ABI_HEADERS
27# include BOOST_ABI_PREFIX
28#endif
29
30#if defined(BOOST_MSVC)
31# pragma warning(push)
32# pragma warning(disable:4355)
33#endif
34
35namespace boost {
36namespace coroutines {
37namespace detail {
38
39struct pull_coroutine_context
40{
41 coroutine_context caller;
42 coroutine_context callee;
43
44 template< typename Coro >
45 pull_coroutine_context( preallocated const& palloc, Coro *) :
46 caller(),
47 callee( trampoline_pull< Coro >, palloc)
48 {}
49};
50
51template< typename PushCoro, typename R, typename Fn, typename StackAllocator >
52class pull_coroutine_object : private pull_coroutine_context,
53 public pull_coroutine_impl< R >
54{
55private:
56 typedef pull_coroutine_context ctx_t;
57 typedef pull_coroutine_impl< R > base_t;
58 typedef pull_coroutine_object< PushCoro, R, Fn, StackAllocator > obj_t;
59
60 Fn fn_;
61 stack_context stack_ctx_;
62 StackAllocator stack_alloc_;
63
64 static void deallocate_( obj_t * obj)
65 {
66 stack_context stack_ctx( obj->stack_ctx_);
67 StackAllocator stack_alloc( obj->stack_alloc_);
68 obj->unwind_stack();
69 obj->~obj_t();
70 stack_alloc.deallocate( stack_ctx);
71 }
72
73public:
74#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
75 pull_coroutine_object( Fn fn, attributes const& attrs,
76 preallocated const& palloc,
77 StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
78 ctx_t( palloc, this),
79 base_t( & this->caller,
80 & this->callee,
81 stack_unwind == attrs.do_unwind),
82 fn_( fn),
83 stack_ctx_( palloc.sctx),
84 stack_alloc_( stack_alloc)
85 {}
86#endif
87
88 pull_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
89 preallocated const& palloc,
90 StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
91 ctx_t( palloc, this),
92 base_t( & this->caller,
93 & this->callee,
94 stack_unwind == attrs.do_unwind),
95#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
96 fn_( fn),
97#else
98 fn_( boost::forward< Fn >( fn) ),
99#endif
100 stack_ctx_( palloc.sctx),
101 stack_alloc_( stack_alloc)
102 {}
103
104 void run()
105 {
106 BOOST_ASSERT( ! base_t::unwind_requested() );
107
108 base_t::flags_ |= flag_started;
109 base_t::flags_ |= flag_running;
110
111 // create push_coroutine
112 typename PushCoro::synth_type b( & this->callee, & this->caller, false);
113 PushCoro push_coro( synthesized_t::syntesized, b);
114 try
115 { fn_( push_coro); }
116 catch ( forced_unwind const&)
117 {}
118 catch (...)
119 { base_t::except_ = current_exception(); }
120
121 base_t::flags_ |= flag_complete;
122 base_t::flags_ &= ~flag_running;
123 typename base_t::param_type to;
124 this->callee.jump(
125 this->caller,
126 & to);
127 BOOST_ASSERT_MSG( false, "pull_coroutine is complete");
128 }
129
130 void destroy()
131 { deallocate_( this); }
132};
133
134template< typename PushCoro, typename R, typename Fn, typename StackAllocator >
135class pull_coroutine_object< PushCoro, R &, Fn, StackAllocator > : private pull_coroutine_context,
136 public pull_coroutine_impl< R & >
137{
138private:
139 typedef pull_coroutine_context ctx_t;
140 typedef pull_coroutine_impl< R & > base_t;
141 typedef pull_coroutine_object< PushCoro, R &, Fn, StackAllocator > obj_t;
142
143 Fn fn_;
144 stack_context stack_ctx_;
145 StackAllocator stack_alloc_;
146
147 static void deallocate_( obj_t * obj)
148 {
149 stack_context stack_ctx( obj->stack_ctx_);
150 StackAllocator stack_alloc( obj->stack_alloc_);
151 obj->unwind_stack();
152 obj->~obj_t();
153 stack_alloc.deallocate( stack_ctx);
154 }
155
156public:
157#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
158 pull_coroutine_object( Fn fn, attributes const& attrs,
159 preallocated const& palloc,
160 StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
161 ctx_t( palloc, this),
162 base_t( & this->caller,
163 & this->callee,
164 stack_unwind == attrs.do_unwind),
165 fn_( fn),
166 stack_ctx_( palloc.sctx),
167 stack_alloc_( stack_alloc)
168 {}
169#endif
170
171 pull_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
172 preallocated const& palloc,
173 StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
174 ctx_t( palloc, this),
175 base_t( & this->caller,
176 & this->callee,
177 stack_unwind == attrs.do_unwind),
178#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
179 fn_( fn),
180#else
181 fn_( boost::forward< Fn >( fn) ),
182#endif
183 stack_ctx_( palloc.sctx),
184 stack_alloc_( stack_alloc)
185 {}
186
187 void run()
188 {
189 BOOST_ASSERT( ! base_t::unwind_requested() );
190
191 base_t::flags_ |= flag_started;
192 base_t::flags_ |= flag_running;
193
194 // create push_coroutine
195 typename PushCoro::synth_type b( & this->callee, & this->caller, false);
196 PushCoro push_coro( synthesized_t::syntesized, b);
197 try
198 { fn_( push_coro); }
199 catch ( forced_unwind const&)
200 {}
201 catch (...)
202 { base_t::except_ = current_exception(); }
203
204 base_t::flags_ |= flag_complete;
205 base_t::flags_ &= ~flag_running;
206 typename base_t::param_type to;
207 this->callee.jump(
208 this->caller,
209 & to);
210 BOOST_ASSERT_MSG( false, "pull_coroutine is complete");
211 }
212
213 void destroy()
214 { deallocate_( this); }
215};
216
217template< typename PushCoro, typename Fn, typename StackAllocator >
218class pull_coroutine_object< PushCoro, void, Fn, StackAllocator > : private pull_coroutine_context,
219 public pull_coroutine_impl< void >
220{
221private:
222 typedef pull_coroutine_context ctx_t;
223 typedef pull_coroutine_impl< void > base_t;
224 typedef pull_coroutine_object< PushCoro, void, Fn, StackAllocator > obj_t;
225
226 Fn fn_;
227 stack_context stack_ctx_;
228 StackAllocator stack_alloc_;
229
230 static void deallocate_( obj_t * obj)
231 {
232 stack_context stack_ctx( obj->stack_ctx_);
233 StackAllocator stack_alloc( obj->stack_alloc_);
234 obj->unwind_stack();
235 obj->~obj_t();
236 stack_alloc.deallocate( stack_ctx);
237 }
238
239public:
240#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
241 pull_coroutine_object( Fn fn, attributes const& attrs,
242 preallocated const& palloc,
243 StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
244 ctx_t( palloc, this),
245 base_t( & this->caller,
246 & this->callee,
247 stack_unwind == attrs.do_unwind),
248 fn_( fn),
249 stack_ctx_( palloc.sctx),
250 stack_alloc_( stack_alloc)
251 {}
252#endif
253
254 pull_coroutine_object( BOOST_RV_REF( Fn) fn, attributes const& attrs,
255 preallocated const& palloc,
256 StackAllocator const& stack_alloc) BOOST_NOEXCEPT :
257 ctx_t( palloc, this),
258 base_t( & this->caller,
259 & this->callee,
260 stack_unwind == attrs.do_unwind),
261#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
262 fn_( fn),
263#else
264 fn_( boost::forward< Fn >( fn) ),
265#endif
266 stack_ctx_( palloc.sctx),
267 stack_alloc_( stack_alloc)
268 {}
269
270 void run()
271 {
272 BOOST_ASSERT( ! base_t::unwind_requested() );
273
274 base_t::flags_ |= flag_started;
275 base_t::flags_ |= flag_running;
276
277 // create push_coroutine
278 typename PushCoro::synth_type b( & this->callee, & this->caller, false);
279 PushCoro push_coro( synthesized_t::syntesized, b);
280 try
281 { fn_( push_coro); }
282 catch ( forced_unwind const&)
283 {}
284 catch (...)
285 { base_t::except_ = current_exception(); }
286
287 base_t::flags_ |= flag_complete;
288 base_t::flags_ &= ~flag_running;
289 typename base_t::param_type to;
290 this->callee.jump(
291 this->caller,
292 & to);
293 BOOST_ASSERT_MSG( false, "pull_coroutine is complete");
294 }
295
296 void destroy()
297 { deallocate_( this); }
298};
299
300}}}
301
302#if defined(BOOST_MSVC)
303# pragma warning(pop)
304#endif
305
306#ifdef BOOST_HAS_ABI_HEADERS
307# include BOOST_ABI_SUFFIX
308#endif
309
310#endif // BOOST_COROUTINES_DETAIL_PULL_COROUTINE_OBJECT_H
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