| 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_COROUTINE_CONTEXT_H |
| 8 | #define BOOST_COROUTINES_DETAIL_COROUTINE_CONTEXT_H |
| 9 | |
| 10 | #include <cstddef> |
| 11 | |
| 12 | #include <boost/assert.hpp> |
| 13 | #include <boost/config.hpp> |
| 14 | #include <boost/context/detail/fcontext.hpp> |
| 15 | |
| 16 | #include <boost/coroutine/detail/config.hpp> |
| 17 | #include <boost/coroutine/detail/preallocated.hpp> |
| 18 | #include <boost/coroutine/stack_context.hpp> |
| 19 | |
| 20 | #ifdef BOOST_HAS_ABI_HEADERS |
| 21 | # include BOOST_ABI_PREFIX |
| 22 | #endif |
| 23 | |
| 24 | namespace boost { |
| 25 | namespace coroutines { |
| 26 | namespace detail { |
| 27 | |
| 28 | // class hold stack-context and coroutines execution-context |
| 29 | class BOOST_COROUTINES_DECL coroutine_context |
| 30 | { |
| 31 | private: |
| 32 | template< typename Coro > |
| 33 | friend void trampoline( context::detail::transfer_t); |
| 34 | template< typename Coro > |
| 35 | friend void trampoline_void( context::detail::transfer_t); |
| 36 | template< typename Coro > |
| 37 | friend void trampoline_pull( context::detail::transfer_t); |
| 38 | template< typename Coro > |
| 39 | friend void trampoline_push( context::detail::transfer_t); |
| 40 | template< typename Coro > |
| 41 | friend void trampoline_push_void( context::detail::transfer_t); |
| 42 | |
| 43 | preallocated palloc_; |
| 44 | context::detail::fcontext_t ctx_; |
| 45 | |
| 46 | public: |
| 47 | typedef void( * ctx_fn)( context::detail::transfer_t); |
| 48 | |
| 49 | // default ctor represents the current execution-context |
| 50 | coroutine_context(); |
| 51 | |
| 52 | // ctor creates a new execution-context running coroutine-fn `fn` |
| 53 | // `ctx_` will be allocated on top of the stack managed by parameter |
| 54 | // `stack_ctx` |
| 55 | coroutine_context( ctx_fn fn, preallocated const& palloc); |
| 56 | |
| 57 | coroutine_context( coroutine_context const&); |
| 58 | |
| 59 | coroutine_context& operator=( coroutine_context const&); |
| 60 | |
| 61 | void * jump( coroutine_context &, void * = 0); |
| 62 | |
| 63 | stack_context & stack_ctx() |
| 64 | { return palloc_.sctx; } |
| 65 | }; |
| 66 | |
| 67 | }}} |
| 68 | |
| 69 | #ifdef BOOST_HAS_ABI_HEADERS |
| 70 | # include BOOST_ABI_SUFFIX |
| 71 | #endif |
| 72 | |
| 73 | #endif // BOOST_COROUTINES_DETAIL_COROUTINE_CONTEXT_H |
| 74 |