cds/intrusive/details/raw_ptr_disposer.h

   1 //$$CDS-header$$
   2
   3 #ifndef CDSLIB_INTRUSIVE_DETAILS_RAW_PTR_DISPOSER_H
   4 #define CDSLIB_INTRUSIVE_DETAILS_RAW_PTR_DISPOSER_H
   5
   6 #include <cds/details/defs.h>
   7
   8 //@cond
   9 namespace cds { namespace intrusive { namespace details {
  10
  11     template <typename RCU, typename NodeType, typename Disposer>
  12     struct raw_ptr_disposer
  13     {
  14         typedef RCU gc;
  15         typedef NodeType node_type;
  16         typedef Disposer disposer;
  17
  18         node_type *     pReclaimedChain;
  19
  20         raw_ptr_disposer()
  21             : pReclaimedChain( nullptr )
  22         {}
  23
  24         template <typename Position>
  25         explicit raw_ptr_disposer( Position& pos )
  26             : pReclaimedChain( pos.pDelChain )
  27         {
  28             pos.pDelChain = nullptr;
  29         }
  30
  31         raw_ptr_disposer( raw_ptr_disposer&& d )
  32             : pReclaimedChain( d.pReclaimedChain )
  33         {
  34             d.pReclaimedChain = nullptr;
  35         }
  36
  37         raw_ptr_disposer( raw_ptr_disposer const& ) = delete;
  38
  39         ~raw_ptr_disposer()
  40         {
  41             apply();
  42         }
  43
  44         raw_ptr_disposer& operator=(raw_ptr_disposer&& d)
  45         {
  46             assert( pReclaimedChain == nullptr );
  47             pReclaimedChain = d.pReclaimedChain;
  48             d.pReclaimedChain = nullptr;
  49             return *this;
  50         }
  51
  52         raw_ptr_disposer& operator=(raw_ptr_disposer const& d) = delete;
  53
  54         void apply()
  55         {
  56             if ( pReclaimedChain ) {
  57                 assert( !gc::is_locked());
  58                 disposer()( pReclaimedChain );
  59                 pReclaimedChain = nullptr;
  60             }
  61         }
  62     };
  63
  64 }}} // namespace cds::intrusive::details
  65 //@endcond
  66
  67 #endif // #ifndef CDSLIB_INTRUSIVE_DETAILS_RAW_PTR_DISPOSER_H