ceph/src/boost/libs/fiber/include/boost/fiber/future/detail/shared_state_object.hpp

   1
   2 //          Copyright Oliver Kowalke 2013.
   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_FIBERS_DETAIL_SHARED_STATE_OBJECT_H
   8 #define BOOST_FIBERS_DETAIL_SHARED_STATE_OBJECT_H
   9
  10 #include <memory>
  11
  12 #include <boost/config.hpp>
  13
  14 #include <boost/fiber/detail/config.hpp>
  15 #include <boost/fiber/future/detail/shared_state.hpp>
  16
  17 #ifdef BOOST_HAS_ABI_HEADERS
  18 #  include BOOST_ABI_PREFIX
  19 #endif
  20
  21 namespace boost {
  22 namespace fibers {
  23 namespace detail {
  24
  25 template< typename R, typename Allocator >
  26 class shared_state_object : public shared_state< R > {
  27 public:
  28     typedef typename std::allocator_traits< Allocator >::template rebind_alloc<
  29         shared_state_object
  30     >                                           allocator_t;
  31
  32     shared_state_object( allocator_t const& alloc) :
  33         shared_state< R >(), alloc_( alloc) {
  34     }
  35
  36 protected:
  37     void deallocate_future() noexcept override final {
  38         destroy_( alloc_, this);
  39     }
  40
  41 private:
  42     allocator_t             alloc_;
  43
  44     static void destroy_( allocator_t const& alloc, shared_state_object * p) noexcept {
  45         allocator_t a{ alloc };
  46         a.destroy( p);
  47         a.deallocate( p, 1);
  48     }
  49 };
  50
  51 }}}
  52
  53 #ifdef BOOST_HAS_ABI_HEADERS
  54 #  include BOOST_ABI_SUFFIX
  55 #endif
  56
  57 #endif // BOOST_FIBERS_DETAIL_SHARED_STATE_OBJECT_H