junction/extra/impl/MapAdapter_LeapFrog.h

   1 /*------------------------------------------------------------------------
   2   Junction: Concurrent data structures in C++
   3   Copyright (c) 2016 Jeff Preshing
   4
   5   Distributed under the Simplified BSD License.
   6   Original location: https://github.com/preshing/junction
   7
   8   This software is distributed WITHOUT ANY WARRANTY; without even the
   9   implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  10   See the LICENSE file for more information.
  11 ------------------------------------------------------------------------*/
  12
  13 #ifndef JUNCTION_EXTRA_IMPL_MAPADAPTER_LEAPFROG_H
  14 #define JUNCTION_EXTRA_IMPL_MAPADAPTER_LEAPFROG_H
  15
  16 #include <junction/Core.h>
  17 #include <junction/QSBR.h>
  18 #include <junction/ConcurrentMap_LeapFrog.h>
  19 #include <turf/Util.h>
  20
  21 namespace junction {
  22 namespace extra {
  23
  24 class MapAdapter {
  25 public:
  26     static TURF_CONSTEXPR const char* MapName = "Junction LeapFrog map";
  27
  28     MapAdapter(ureg) {
  29     }
  30
  31     class ThreadContext {
  32     private:
  33         QSBR::Context m_qsbrContext;
  34
  35     public:
  36         ThreadContext(MapAdapter&, ureg) {
  37         }
  38
  39         void registerThread() {
  40             m_qsbrContext = DefaultQSBR.createContext();
  41         }
  42
  43         void unregisterThread() {
  44             DefaultQSBR.destroyContext(m_qsbrContext);
  45         }
  46
  47         void update() {
  48             DefaultQSBR.update(m_qsbrContext);
  49         }
  50     };
  51
  52     typedef ConcurrentMap_LeapFrog<u32, void*> Map;
  53
  54     static ureg getInitialCapacity(ureg maxPopulation) {
  55         return turf::util::roundUpPowerOf2(maxPopulation / 4);
  56     }
  57 };
  58
  59 } // namespace extra
  60 } // namespace junction
  61
  62 #endif // JUNCTION_EXTRA_IMPL_MAPADAPTER_LEAPFROG_H