util/tlm/src/sc_mm.cc

   1 /*
   2  * Copyright (c) 2015, University of Kaiserslautern
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. Neither the name of the copyright holder nor the names of its
  17  *    contributors may be used to endorse or promote products derived from
  18  *    this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
  24  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * Authors:
  33  *    Robert Gernhardt
  34  *    Matthias Jung
  35  */
  36
  37 #include <iostream>
  38
  39 #include "sc_mm.hh"
  40
  41 using namespace std;
  42
  43 namespace Gem5SystemC
  44 {
  45
  46 MemoryManager::MemoryManager(): numberOfAllocations(0), numberOfFrees(0)
  47 {
  48
  49 }
  50
  51 MemoryManager::~MemoryManager()
  52 {
  53     for (gp* payload: freePayloads) {
  54         delete payload;
  55         numberOfFrees++;
  56     }
  57 }
  58
  59 gp*
  60 MemoryManager::allocate()
  61 {
  62     if (freePayloads.empty()) {
  63         numberOfAllocations++;
  64         return new gp(this);
  65     } else {
  66         gp* result = freePayloads.back();
  67         freePayloads.pop_back();
  68         return result;
  69     }
  70 }
  71
  72 void
  73 MemoryManager::free(gp* payload)
  74 {
  75     payload->reset(); //clears all extensions
  76     freePayloads.push_back(payload);
  77 }
  78
  79 }