调整Request C.BHFree的位置

liuxiaolong

2021-07-20 58d904a328c0d849769b483e901a0be9426b8209

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//          Copyright Oliver Kowalke 2016.
// 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_COROUTINES2_DETAIL_PULL_CONTROL_BLOCK_HPP
#define BOOST_COROUTINES2_DETAIL_PULL_CONTROL_BLOCK_HPP
 
#include <exception>
#include <type_traits>
 
#include <boost/config.hpp>
#include <boost/context/fiber.hpp>
 
#include <boost/coroutine2/detail/state.hpp>
 
#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_PREFIX
#endif
 
namespace boost {
namespace coroutines2 {
namespace detail {
 
template< typename T >
struct pull_coroutine< T >::control_block {
    boost::context::fiber                                           c;
    typename push_coroutine< T >::control_block                 *   other;
    state_t                                                         state;
    std::exception_ptr                                              except;
    bool                                                            bvalid;
    typename std::aligned_storage< sizeof( T), alignof( T) >::type  storage;
 
    static void destroy( control_block * cb) noexcept;
 
    template< typename StackAllocator, typename Fn >
    control_block( context::preallocated, StackAllocator &&, Fn &&);
 
    control_block( typename push_coroutine< T >::control_block *, boost::context::fiber &) noexcept;
 
    ~control_block();
 
    control_block( control_block &) = delete;
    control_block & operator=( control_block &) = delete;
 
    void deallocate() noexcept;
 
    void resume();
 
    void set( T const&);
    void set( T &&);
 
    T & get() noexcept;
 
    bool valid() const noexcept;
};
 
template< typename T >
struct pull_coroutine< T & >::control_block {
    struct holder {
        T   &   t;
 
        holder( T & t_) :
            t{ t_ } {
        }
    };
 
    boost::context::fiber                                                       c;
    typename push_coroutine< T & >::control_block                           *   other;
    state_t                                                                     state;
    std::exception_ptr                                                          except;
    bool                                                                        bvalid;
    typename std::aligned_storage< sizeof( holder), alignof( holder) >::type    storage;
 
    static void destroy( control_block * cb) noexcept;
 
    template< typename StackAllocator, typename Fn >
    control_block( context::preallocated, StackAllocator &&, Fn &&);
 
    control_block( typename push_coroutine< T & >::control_block *, boost::context::fiber &) noexcept;
 
    control_block( control_block &) = delete;
    control_block & operator=( control_block &) = delete;
 
    void deallocate() noexcept;
 
    void resume();
 
    void set( T &);
 
    T & get() noexcept;
 
    bool valid() const noexcept;
};
 
struct pull_coroutine< void >::control_block {
    boost::context::fiber                       c;
    push_coroutine< void >::control_block  *    other;
    state_t                                     state;
    std::exception_ptr                          except;
 
    static void destroy( control_block * cb) noexcept;
 
    template< typename StackAllocator, typename Fn >
    control_block( context::preallocated, StackAllocator &&, Fn &&);
 
    control_block( push_coroutine< void >::control_block *, boost::context::fiber &) noexcept;
 
    control_block( control_block &) = delete;
    control_block & operator=( control_block &) = delete;
 
    void deallocate() noexcept;
 
    void resume();
 
    bool valid() const noexcept;
};
 
}}}
 
#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_SUFFIX
#endif
 
#endif // BOOST_COROUTINES2_DETAIL_PULL_CONTROL_BLOCK_HPP