simple_pool_manager.hh

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/*
 * Copyright (c) 2015 Advanced Micro Devices, Inc.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
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 * 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
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 * software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#ifndef __SIMPLE_POOL_MANAGER_HH__
#define __SIMPLE_POOL_MANAGER_HH__
 
#include <cassert>
#include <cstdint>
 
#include "gpu-compute/pool_manager.hh"
#include "params/SimplePoolManager.hh"
 
namespace gem5
{
 
// Simple Pool Manager: allows one region per pool. No region merging is
// supported.
class SimplePoolManager : public PoolManager
{
  public:
    SimplePoolManager(const PoolManagerParams &p)
        : PoolManager(p), _regionSize(0), _nxtFreeIdx(0),
          _reservedGroups(0)
    {
    }
 
    uint32_t minAllocatedElements(uint32_t size);
    std::string printRegion();
    bool canAllocate(uint32_t numRegions, uint32_t size);
    uint32_t allocateRegion(const uint32_t size, uint32_t *reservedPoolSize);
    void freeRegion(uint32_t firstIdx, uint32_t lastIdx);
    uint32_t regionSize(std::pair<uint32_t,uint32_t> &region);
 
  private:
    // actual size of a region (normalized to the minimum size that can
    // be reserved)
    uint32_t _regionSize;
    // next index to allocate a region
    int _nxtFreeIdx;
    // number of groups that reserve a region
    uint32_t _reservedGroups;
};
 
} // namespace gem5
 
#endif // __SIMPLE_POOL_MANAGER_HH__