text: /* 
   * Copyright (c) 2011-2014, University of Delaware
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 
   * 1. Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   * 
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  
  #ifndef RINGBUFFER_H
  #define	RINGBUFFER_H
  #include <cstdio>
  #include "Atomics.h"
  #include "SyncSlot.h"
  
  namespace darts
  {
      template <class T, size_t num>
      class ringBuffer
      {
          private:
              unsigned int produceCount;
              char pad1[64-sizeof(int)];
              unsigned int consumeCount;
              char pad2[64-sizeof(int)];
              T buffer_[num];
          public:
              ringBuffer(void):
              produceCount(0),
              consumeCount(0) { }
  
              bool push(T toAdd )
              {
                  if(produceCount - consumeCount == num)
                      return false;
                  buffer_[produceCount & (num -1)] = toAdd;
                  //produceCount++;
                  Atomics::fetchAdd(produceCount, 1U);
                  return true;
              }
  
              T pull(void)
              {
                  if(produceCount - consumeCount == 0)
                      return 0;
                  T temp = buffer_[consumeCount & (num -1)];
                  //consumeCount++;
                  Atomics::fetchAdd(consumeCount, 1U);
                  return temp;
              }
      };
  }
  
  #endif	/* RINGBUFFER_H */
  
  