pool_manager.hh

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/*
 * Copyright (c) 2015 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * For use for simulation and test purposes only
 *
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 * 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.
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 * 3. Neither the name of the copyright holder nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * Author: John Kalamatianos
 */

#ifndef __POOL_MANAGER_HH__
#define __POOL_MANAGER_HH__

#include <cassert>
#include <cstdint>
#include <string>

// Pool Manager Logic
class PoolManager
{
  public:
    PoolManager(uint32_t minAlloc, uint32_t poolSize);
    uint32_t minAllocation() { return _minAllocation; }
    virtual std::string printRegion() = 0;
    virtual uint32_t regionSize(std::pair<uint32_t,uint32_t> &region) = 0;
    virtual bool canAllocate(uint32_t numRegions, uint32_t size) = 0;

    virtual uint32_t allocateRegion(const uint32_t size,
                                    uint32_t *reserved) = 0;

    virtual void freeRegion(uint32_t firstIdx, uint32_t lastIdx) = 0;
    uint32_t poolSize() { return _poolSize; }

  private:
    // minimum size that can be reserved per allocation
    uint32_t _minAllocation;
    // pool size in number of elements
    uint32_t _poolSize;
};

#endif // __POOL_MANAGER_HH__