SDC C-Project CF Review 프로그램
LYW
2022-08-05 5f12658f37fed156e67b3318542c98f359341ffd
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#pragma once
 
#include <assert.h>
 
// Edited from C8MemPool class (Hitel, gma 7 3) - 1CoinClear -
 
template<class Type> class CMemPooler
{
public:
    // »ý¼ºÀÚ 
    CMemPooler(int nNumOfBlock):m_nNumofBlock(nNumOfBlock),
                               m_pFreeList(NULL),
                               m_pMemBlock(NULL),
                               m_nAllocCount(0)
    {
        assert(nNumOfBlock > 0);
        m_nListBlockSize = sizeof(BlockNode) + sizeof(Type);
        
        Create();
    }
 
    // ¼Ò¸êÀÚ
    ~CMemPooler()
    {
        Destroy();
    }
 
    // ¸Þ¸ð¸® ÇÒ´ç 
    Type* Alloc()
    {
        EnterCriticalSection(&m_csAlloc);
 
        BlockNode* pNode = NULL;
        Type* pRet = NULL;
 
        ////////////////////////////
        pNode = m_pFreeList;
        if(pNode != NULL)
        {
            m_pFreeList = m_pFreeList->pNext;
            m_nAllocCount++;
            pRet = reinterpret_cast<Type*>(pNode+1);
        }
 
        ////////////////////////////
        LeaveCriticalSection(&m_csAlloc);
 
        return pRet;
    }
 
    BOOL Free(Type* freeBlock)
    {
        EnterCriticalSection(&m_csAlloc);
 
        BlockNode* pNode = NULL;
        BOOL bRet = FALSE;
 
        ///////////////////////////
 
        pNode = (reinterpret_cast<BlockNode*>(freeBlock)) - 1;
        if(m_nAllocCount > 0)
        {
            pNode->pNext = m_pFreeList;
            m_pFreeList = pNode;
            m_nAllocCount--;
            bRet = TRUE;
        }
 
        ///////////////////////////
        LeaveCriticalSection(&m_csAlloc);
 
        return bRet;
    }
 
    int GetAllocCount()
    {
        return m_nAllocCount;
    }
    int GetBlockCount()
    {
        return m_nNumofBlock;
    }
 
protected:
    void Create()
    {
        const int AllocationSize = (m_nListBlockSize) * m_nNumofBlock; // ¸Þ¸ð¸® ÇÒ´çÇÒ Å©±â 
        m_pMemBlock = VirtualAlloc(NULL, AllocationSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
        assert(m_pMemBlock);
 
        BlockNode* pNode = reinterpret_cast<BlockNode*>(m_pMemBlock);
 
        //pNode = reinterpret_cast<BlockNode*>((reinterpret_cast<DWORD>(pNode))+(m_nNumofBlock-1)* (m_nListBlockSize) );
        pNode = (BlockNode*)((char*)pNode + ((m_nNumofBlock - 1) * (m_nListBlockSize)));
        for(int i = m_nNumofBlock - 1; i >= 0; i--)
        {
            pNode->pNext = m_pFreeList; // Ã³À½¿¡´Â NULL , Áï Tail Àº NULL ·Î ÇÑ´Ù.
            m_pFreeList = pNode;
            //pNode = reinterpret_cast<BlockNode*>((reinterpret_cast<DWORD>(pNode))-m_nListBlockSize);
            pNode = (BlockNode*)((char*)pNode - m_nListBlockSize);
        }
 
        InitializeCriticalSection(&m_csAlloc);
    }
 
    void Destroy()
    {
        if(m_pMemBlock)
        {
            VirtualFree(m_pMemBlock,0,MEM_RELEASE);
        }
 
        DeleteCriticalSection(&m_csAlloc);
    }
 
    ///////////////////////////////////////////
    // ¸µÅ©µå ¸®½ºÆ® Ã³·³ °ü¸®¸¦ À§ÇÑ ³ëµå Å¸ÀÔ
    struct BlockNode
    {
        BlockNode* pNext;
        BlockNode()
        {
            pNext=NULL;
        }
    };
    //////////////////////////////////////////
 
protected:
    BlockNode* m_pFreeList; // ³²¾Æ Àִ ¸Þ¸ð¸® ºí·° ¸®½ºÆ®
    void* m_pMemBlock;
 
    int m_nNumofBlock;      // ¸Þ¸ð¸® ÇÒ´çÇÒ ºí·° ¼ö
    int m_nListBlockSize;   // ÇÑ ºí·° »çÀÌÁî 
    int m_nAllocCount;      // ÇÒ´çµÈ ¸Þ¸ð¸® ºí·° °¹¼ö
 
    CRITICAL_SECTION m_csAlloc;  // For Thread-Safe;
};