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101 lines
2.1 KiB
C++
101 lines
2.1 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/******************************************************************************************
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* $Id$
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*
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******************************************************************************************/
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#include <iostream>
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//#define NDEBUG
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#include <cassert>
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#include "poolallocator.h"
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using namespace std;
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using namespace boost;
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namespace utils
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{
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PoolAllocator & PoolAllocator::operator=(const PoolAllocator &v)
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{
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allocSize = v.allocSize;
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tmpSpace = v.tmpSpace;
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deallocateAll();
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return *this;
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}
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void PoolAllocator::deallocateAll()
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{
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capacityRemaining = 0;
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nextAlloc = NULL;
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memUsage = 0;
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mem.clear();
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oob.clear();
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}
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void PoolAllocator::newBlock()
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{
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shared_array<uint8_t> next;
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capacityRemaining = allocSize;
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if (!tmpSpace || mem.size() == 0) {
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next.reset(new uint8_t[allocSize]);
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mem.push_back(next);
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nextAlloc = next.get();
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}
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else
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nextAlloc = mem.front().get();
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}
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void * PoolAllocator::allocate(uint64_t size)
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{
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void *ret;
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if (size > allocSize) {
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OOBMemInfo memInfo;
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memUsage += size;
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memInfo.mem.reset(new uint8_t[size]);
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memInfo.size = size;
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ret = (void *) memInfo.mem.get();
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oob[ret] = memInfo;
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return ret;
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}
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if (size > capacityRemaining)
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newBlock();
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ret = (void *) nextAlloc;
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nextAlloc += size;
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capacityRemaining -= size;
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memUsage += size;
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return ret;
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}
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void PoolAllocator::deallocate(void *p)
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{
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OutOfBandMap::iterator it = oob.find(p);
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if (it == oob.end())
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return;
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memUsage -= it->second.size;
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oob.erase(it);
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}
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}
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