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/* This file is part of VoltDB. | ||
* Copyright (C) 2008-2011 VoltDB Inc. | ||
* | ||
* VoltDB is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* VoltDB is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#include "CompactingStringPool.h" | ||
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#include "StringRef.h" | ||
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using namespace voltdb; | ||
using namespace std; | ||
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CompactingStringPool::CompactingStringPool(int32_t elementSize, | ||
int32_t elementsPerBuf) : | ||
m_pool(elementSize, elementsPerBuf) | ||
{ | ||
} | ||
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void* | ||
CompactingStringPool::malloc() | ||
{ | ||
return m_pool.malloc(); | ||
} | ||
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void | ||
CompactingStringPool::free(void* element) | ||
{ | ||
bool mutated = m_pool.free(element); | ||
if (mutated) | ||
{ | ||
// use the backpointer to the StringRef object in the moved | ||
// data to update that object with the new string location | ||
StringRef* back_ptr = *reinterpret_cast<StringRef**>(element); | ||
back_ptr->updateStringLocation(element); | ||
} | ||
} | ||
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size_t | ||
CompactingStringPool::getBytesAllocated() const | ||
{ | ||
return m_pool.getBytesAllocated(); | ||
} |
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/* This file is part of VoltDB. | ||
* Copyright (C) 2008-2011 VoltDB Inc. | ||
* | ||
* VoltDB is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* VoltDB is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#ifndef _EE_COMMON_COMPACTINGSTRINGPOOL_H_ | ||
#define _EE_COMMON_COMPACTINGSTRINGPOOL_H_ | ||
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#include "structures/CompactingPool.h" | ||
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#include <cstdlib> | ||
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namespace voltdb | ||
{ | ||
class CompactingStringPool | ||
{ | ||
public: | ||
CompactingStringPool(int32_t elementSize, int32_t elementsPerBuf); | ||
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void* malloc(); | ||
void free(void* element); | ||
size_t getBytesAllocated() const; | ||
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private: | ||
CompactingPool m_pool; | ||
}; | ||
} | ||
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#endif // _EE_COMMON_COMPACTINGSTRINGPOOL_H_ |
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/* This file is part of VoltDB. | ||
* Copyright (C) 2008-2011 VoltDB Inc. | ||
* | ||
* VoltDB is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* VoltDB is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
#include "common/CompactingStringStorage.h" | ||
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#include "common/FatalException.hpp" | ||
#include <boost/unordered_map.hpp> | ||
#include <iostream> | ||
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using namespace voltdb; | ||
using namespace std; | ||
using boost::shared_ptr; | ||
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namespace | ||
{ | ||
size_t getAllocationSizeForObject(size_t length) | ||
{ | ||
if (length <= 2) { | ||
return 2; | ||
} else if (length <= 4) { | ||
return 4; | ||
} else if (length <= 4 + 2) { | ||
return 4 + 2; | ||
} else if (length <= 8) { | ||
return 8; | ||
} else if (length <= 8 + 4) { | ||
return 8 + 4; | ||
} else if (length <= 16) { | ||
return 16; | ||
} else if (length <= 16 + 8) { | ||
return 16 + 8; | ||
} else if (length <= 32) { | ||
return 32; | ||
} else if (length <= 32 + 16) { | ||
return 32 + 16; | ||
} else if (length <= 64) { | ||
return 64; | ||
} else if (length <= 64 + 32) { | ||
return 64 + 32; | ||
} else if (length <= 128) { | ||
return 128; | ||
} else if (length < 128 + 64) { | ||
return 128 + 64; | ||
} else if (length <= 256) { | ||
return 256; | ||
} else if (length <= 256 + 128) { | ||
return 256 + 128; | ||
} else if (length <= 512) { | ||
return 512; | ||
} else if (length <= 512 + 256) { | ||
return 512 + 256; | ||
} else if (length <= 1024) { | ||
return 1024; | ||
} else if (length <= 1024 + 512) { | ||
return 1024 + 512; | ||
} else if (length <= 2048) { | ||
return 2048; | ||
} else if (length <= 2048 + 1024) { | ||
return 2048 + 1024; | ||
} else if (length <= 4096) { | ||
return 4096; | ||
} else if (length < 4096 + 2048) { | ||
return 4096 + 2048; | ||
} else if (length <= 8192) { | ||
return 8192; | ||
} else if (length < 8192 + 4096) { | ||
return 8192 + 4096; | ||
} else if (length <= 16384) { | ||
return 16384; | ||
} else if (length <= 16384 + 8192) { | ||
return 16384 + 8192; | ||
} else if (length <= 32768) { | ||
return 32768; | ||
} else if (length <= 32768 + 16384) { | ||
return 32768 + 16384; | ||
} else if (length <= 65536) { | ||
return 65536; | ||
} else if (length <= 65536 + 32768) { | ||
return 65536 + 32768; | ||
} else if (length <= 131072) { | ||
return 131072; | ||
} else if (length <= 131072 + 65536) { | ||
return 131072 + 65536; | ||
} else if (length <= 262144) { | ||
return 262144; | ||
} else if (length <= 262144 + 131072) { | ||
return 262144 + 131072; | ||
} else if (length <= 524288) { | ||
return 524288; | ||
} else if (length <= 524288 + 262144) { | ||
return 524288 + 262144; | ||
//Need space for a length prefix and a backpointer | ||
} else if (length <= 1048576 + sizeof(int32_t) + sizeof(void*)) { | ||
return 1048576 + sizeof(int32_t) + sizeof(void*); | ||
} else { | ||
throwFatalException("Attempted to allocate an object then the 1 meg limit. Requested size was %Zu", length); | ||
} | ||
// NOT REACHED | ||
return length + 4; | ||
} | ||
} | ||
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typedef boost::shared_ptr<CompactingStringPool> PoolPtrType; | ||
typedef boost::unordered_map<size_t, PoolPtrType> MapType; | ||
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CompactingStringStorage::CompactingStringStorage() | ||
{ | ||
} | ||
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CompactingStringStorage::~CompactingStringStorage() | ||
{ | ||
} | ||
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PoolPtrType | ||
CompactingStringStorage::get(size_t size) | ||
{ | ||
size = getAllocationSizeForObject(size); | ||
return getExact(size); | ||
} | ||
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PoolPtrType | ||
CompactingStringStorage::getExact(size_t size) | ||
{ | ||
MapType::iterator iter = m_poolMap.find(size); | ||
int32_t ssize = static_cast<int32_t>(size); | ||
PoolPtrType pool; | ||
if (iter == m_poolMap.end()) { | ||
// compute num_elements to be closest multiple | ||
// leading to a 2Meg buffer | ||
int32_t num_elements = (2 * 1024 * 1024 / ssize) + 1; | ||
pool = PoolPtrType(new CompactingStringPool(ssize, num_elements)); | ||
m_poolMap.insert(pair<size_t, PoolPtrType>(size, pool)); | ||
} | ||
else | ||
{ | ||
pool = iter->second; | ||
} | ||
return pool; | ||
} | ||
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size_t CompactingStringStorage::getPoolAllocationSize() | ||
{ | ||
size_t total = 0; | ||
for (MapType::iterator iter = m_poolMap.begin(); | ||
iter != m_poolMap.end(); | ||
++iter) | ||
{ | ||
total += iter->second->getBytesAllocated(); | ||
} | ||
return total; | ||
} |
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@@ -0,0 +1,44 @@ | ||
/* This file is part of VoltDB. | ||
* Copyright (C) 2008-2011 VoltDB Inc. | ||
* | ||
* VoltDB is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* VoltDB is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#ifndef _EE_COMMON_COMPACTINGSTRINGSTORAGE_H_ | ||
#define _EE_COMMON_COMPACTINGSTRINGSTORAGE_H_ | ||
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#include "CompactingStringPool.h" | ||
#include <boost/shared_ptr.hpp> | ||
#include <boost/unordered_map.hpp> | ||
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namespace voltdb { | ||
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class CompactingStringStorage { | ||
public: | ||
CompactingStringStorage(); | ||
~CompactingStringStorage(); | ||
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boost::shared_ptr<CompactingStringPool> get(size_t size); | ||
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boost::shared_ptr<CompactingStringPool> getExact(size_t size); | ||
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std::size_t getPoolAllocationSize(); | ||
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private: | ||
boost::unordered_map<size_t, | ||
boost::shared_ptr<CompactingStringPool> > m_poolMap; | ||
}; | ||
} | ||
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#endif /* COMPACTINGSTRINGSTORAGE_H_ */ |
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