1/*
2 * Copyright (c) 2015 Advanced Micro Devices, Inc.
3 * All rights reserved.
4 *
5 * For use for simulation and test purposes only
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the copyright holder nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 * Authors: John Kalamatianos
34 */
35
36#ifndef __SIMPLE_POOL_MANAGER_HH__
37#define __SIMPLE_POOL_MANAGER_HH__
38
39#include <cassert>
40#include <cstdint>
41
42#include "gpu-compute/pool_manager.hh"
43
44// Simple Pool Manager: allows one region per pool. No region merging is
45// supported.
46class SimplePoolManager : public PoolManager
47{
48  public:
49    SimplePoolManager(uint32_t minAlloc, uint32_t poolSize)
50        : PoolManager(minAlloc, poolSize), _regionSize(0), _nxtFreeIdx(0),
51          _reservedGroups(0)
52    {
53    }
54
55    uint32_t minAllocatedElements(uint32_t size);
56    std::string printRegion();
57    bool canAllocate(uint32_t numRegions, uint32_t size);
58    uint32_t allocateRegion(const uint32_t size, uint32_t *reservedPoolSize);
59    void freeRegion(uint32_t firstIdx, uint32_t lastIdx);
60    uint32_t regionSize(std::pair<uint32_t,uint32_t> &region);
61
62  private:
63    // actual size of a region (normalized to the minimum size that can
64    // be reserved)
65    uint32_t _regionSize;
66    // next index to allocate a region
67    uint8_t _nxtFreeIdx;
68    // number of groups that reserve a region
69    uint32_t _reservedGroups;
70};
71
72#endif // __SIMPLE_POOL_MANAGER_HH__
73