2 * freerainbowtables is a project for generating, distributing, and using
3 * perfect rainbow tables
5 * Copyright (C) Zhu Shuanglei <shuanglei@hotmail.com>
6 * Copyright Martin Westergaard Jørgensen <martinwj2005@gmail.com>
7 * Copyright 2009, 2010 Daniël Niggebrugge <niggebrugge@fox-it.com>
8 * Copyright 2009, 2010 James Nobis <frt@quelrod.net>
9 * Copyright 2010 uroskn
11 * This file is part of freerainbowtables.
13 * freerainbowtables is free software: you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation, either version 2 of the License, or
16 * (at your option) any later version.
18 * freerainbowtables is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with freerainbowtables. If not, see <http://www.gnu.org/licenses/>.
27 #include "MemoryPool.h"
30 CMemoryPool::CMemoryPool()
35 unsigned int nAvailPhys = GetAvailPhysMemorySize();
36 if (nAvailPhys < 16 * 1024 * 1024)
38 nAvailPhys = 512 * 1024 * 1024; // There is atleast 256 mb available (Some Linux distros returns a really low GetAvailPhysMemorySize()
40 if (nAvailPhys < 16 * 1024 * 1024)
41 m_nMemMax = nAvailPhys / 2; // Leave some memory for CChainWalkSet
43 m_nMemMax = nAvailPhys - 8 * 1024 * 1024; // Leave some memory for CChainWalkSet
46 CMemoryPool::~CMemoryPool()
56 unsigned char* CMemoryPool::Allocate(unsigned int nFileLen, unsigned int& nAllocatedSize)
58 if (nFileLen <= m_nMemSize)
60 nAllocatedSize = nFileLen;
64 unsigned int nTargetSize;
65 if (nFileLen < m_nMemMax)
66 nTargetSize = nFileLen;
68 nTargetSize = m_nMemMax;
70 // Free existing memory
78 // Allocate new memory
79 //printf("allocating %u bytes memory\n", nTargetSize);
80 m_pMem = new (nothrow) unsigned char[nTargetSize];
81 while (m_pMem == NULL && nTargetSize >= 512 * 1024 * 1024 )
83 nTargetSize -= 16 * 1024 * 1024;
84 m_pMem = new (nothrow) unsigned char[nTargetSize];
89 m_nMemSize = nTargetSize;
90 nAllocatedSize = nTargetSize;