SaraP
149 lines
3.7 KiB
C++
149 lines
3.7 KiB
C++
/*++
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Copyright (C) 2019 3MF Consortium
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Abstract:
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NMR_PagedVector.h defines a vector class which allocates its memory block-wise, leading to
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significant performance improvements against a standard template library vector.
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--*/
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#ifndef __NMR_PAGEDVECTOR
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#define __NMR_PAGEDVECTOR
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#include "Common/NMR_Local.h"
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#include "Common/NMR_Types.h"
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#include "Common/NMR_Exception.h"
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#include <vector>
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#include <array>
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namespace NMR {
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template <class T, unsigned int DEFAULTBLOCKSIZE = 1024>
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class CPagedVector {
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nfUint32 m_nBlockSize;
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nfUint32 m_nCount;
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T * m_pHeadBlock;
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std::vector<T *> m_pBlocks;
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public:
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CPagedVector() {
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m_nCount = 0;
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m_pHeadBlock = NULL;
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m_nBlockSize = DEFAULTBLOCKSIZE;
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if (m_nBlockSize == 0)
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throw CNMRException(NMR_ERROR_INVALIDBLOCKSIZE);
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}
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CPagedVector(_In_ nfUint32 nBlockSize) {
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m_nCount = 0;
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m_pHeadBlock = NULL;
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m_nBlockSize = nBlockSize;
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if (m_nBlockSize == 0)
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throw CNMRException(NMR_ERROR_INVALIDBLOCKSIZE);
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}
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~CPagedVector() {
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clearAllData();
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}
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nfUint32 getCount() {
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return m_nCount;
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}
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_Ret_notnull_ T * allocData() {
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nfUint32 nIdx = (m_nCount % m_nBlockSize);
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// Allocate new node block if necessary
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if (nIdx == 0) {
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m_pHeadBlock = new T[m_nBlockSize];
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m_pBlocks.push_back(m_pHeadBlock);
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}
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T * pResult = &m_pHeadBlock[nIdx];
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m_nCount++;
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return pResult;
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}
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_Ret_notnull_ T * allocData(_Out_ nfUint32 & nNewIndex) {
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nNewIndex = m_nCount;
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return allocData();
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}
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T& allocDataRef(_Out_ nfUint32& nNewIndex) {
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nfUint32 nIdx = (m_nCount % m_nBlockSize);
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// Allocate new node block if necessary
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if (nIdx == 0) {
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m_pHeadBlock = new T[m_nBlockSize];
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m_pBlocks.push_back(m_pHeadBlock);
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}
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nNewIndex = m_nCount;
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m_nCount++;
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return m_pHeadBlock[nIdx];
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}
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_Ret_notnull_ T * getData(_In_ nfUint32 nIdx) {
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if (nIdx >= m_nCount)
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throw CNMRException(NMR_ERROR_INVALIDINDEX);
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T * block = m_pBlocks[nIdx / m_nBlockSize];
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return &block[nIdx % m_nBlockSize];
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}
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T& getDataRef(_In_ nfUint32 nIdx) {
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if (nIdx >= m_nCount)
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throw CNMRException(NMR_ERROR_INVALIDINDEX);
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T* block = m_pBlocks[nIdx / m_nBlockSize];
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return block[nIdx % m_nBlockSize];
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}
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void clearAllData() {
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for (auto iIterator = m_pBlocks.begin(); iIterator != m_pBlocks.end(); iIterator++)
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{
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T * pBlock = *iIterator;
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delete[] pBlock;
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}
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m_pBlocks.clear();
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m_nCount = 0;
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m_pHeadBlock = NULL;
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}
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nfUint32 getBlockSize() {
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return m_nBlockSize;
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}
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};
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}
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#endif // __NMR_PAGEDVECTOR
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