junction/striped/ConditionBank.cpp

   1 /*------------------------------------------------------------------------
   2   Junction: Concurrent data structures in C++
   3   Copyright (c) 2016-2017 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 #include <junction/Core.h>
  14 #include <junction/striped/ConditionBank.h>
  15
  16 #if JUNCTION_USE_STRIPING
  17
  18 namespace junction {
  19 namespace striped {
  20
  21 ConditionBank DefaultConditionBank;
  22
  23 ConditionBank::~ConditionBank() {
  24     m_initSpinLock.lock();
  25     ConditionPair* pairs = m_pairs.exchange(nullptr, turf::ConsumeRelease);
  26     delete [] pairs;
  27     m_initSpinLock.unlock();
  28 }
  29
  30 ConditionPair* ConditionBank::initialize() {
  31     m_initSpinLock.lock();
  32     ConditionPair* pairs = m_pairs.loadNonatomic();
  33     if (!pairs) {
  34         pairs = new ConditionPair[SizeMask + 1];
  35         m_pairs.store(pairs, turf::Release);
  36     }
  37     m_initSpinLock.unlock();
  38     return pairs;
  39 }
  40
  41 } // namespace striped
  42 } // namespace junction
  43
  44 #endif // JUNCTION_USE_STRIPING