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using System;
namespace XUtliPoolLib
{
public class MemoryPool<T>
{
private short m_blockSize = 0;
private int m_chunkSize = 0;
private MemoryPool<T>.MemoryChunk m_root = null;
private MemoryPool<T>.MemoryChunk m_last = null;
private MemoryPool<T>.MemoryChunk m_lastFreeChunk = null;
private MemoryPool<T>.MemoryBlock m_freeMemBlock = null;
private MemoryPool<T>.AllocMemoryBlock m_freeAllocBlock = null;
public class MemoryChunk
{
public T[] mem = null;
public MemoryPool<T>.MemoryChunk next = null;
public uint blockBit = 0u;
}
public class MemoryBlock
{
public MemoryPool<T>.MemoryChunk chunk = null;
public short start = -1;
public MemoryPool<T>.MemoryBlock next = null;
}
public class AllocMemoryBlock
{
public MemoryPool<T>.MemoryBlock[] mem = new MemoryPool<T>.MemoryBlock[32];
public MemoryPool<T>.AllocMemoryBlock next = null;
}
private void Expand()
{
MemoryPool<T>.MemoryChunk memoryChunk = new MemoryPool<T>.MemoryChunk();
memoryChunk.mem = new T[this.m_chunkSize];
bool flag = this.m_root == null;
if (flag)
{
bool flag2 = this.m_last != null;
if (flag2)
{
XSingleton<XDebug>.singleton.AddErrorLog("root null but last not null!", null, null, null, null, null);
}
this.m_root = memoryChunk;
this.m_last = this.m_root;
}
else
{
this.m_last.next = memoryChunk;
this.m_last = memoryChunk;
}
}
private void IndexLastFreeChunk()
{
bool flag = this.m_lastFreeChunk == null;
if (flag)
{
this.Expand();
this.m_lastFreeChunk = this.m_last;
}
}
private MemoryPool<T>.MemoryBlock GetMemoryBlock()
{
bool flag = this.m_freeMemBlock == null;
MemoryPool<T>.MemoryBlock result;
if (flag)
{
result = new MemoryPool<T>.MemoryBlock();
}
else
{
MemoryPool<T>.MemoryBlock freeMemBlock = this.m_freeMemBlock;
this.m_freeMemBlock = this.m_freeMemBlock.next;
result = freeMemBlock;
}
return result;
}
public void Init(short blockSize, int initChunkCount)
{
this.m_blockSize = blockSize;
this.m_chunkSize = (int)(this.m_blockSize * 32);
for (int i = 0; i < initChunkCount; i++)
{
this.Expand();
}
this.m_lastFreeChunk = this.m_root;
}
public MemoryPool<T>.AllocMemoryBlock Alloc(int blockCount)
{
bool flag = this.m_freeAllocBlock == null;
MemoryPool<T>.AllocMemoryBlock allocMemoryBlock;
if (flag)
{
allocMemoryBlock = new MemoryPool<T>.AllocMemoryBlock();
}
else
{
allocMemoryBlock = this.m_freeAllocBlock;
this.m_freeAllocBlock = this.m_freeAllocBlock.next;
allocMemoryBlock.next = null;
}
this.IndexLastFreeChunk();
int num = 0;
do
{
uint num2 = 1u;
short num3 = 0;
while ((int)num3 < this.m_chunkSize && num < blockCount)
{
bool flag2 = (this.m_lastFreeChunk.blockBit & num2) == 0u;
if (flag2)
{
MemoryPool<T>.MemoryBlock memoryBlock = this.GetMemoryBlock();
memoryBlock.chunk = this.m_lastFreeChunk;
memoryBlock.start = num3;
memoryBlock.next = null;
allocMemoryBlock.mem[num] = memoryBlock;
this.m_lastFreeChunk.blockBit |= num2;
num++;
}
num2 <<= 1;
num3 += this.m_blockSize;
}
bool flag3 = num2 == uint.MaxValue;
if (flag3)
{
this.m_lastFreeChunk = this.m_lastFreeChunk.next;
}
this.IndexLastFreeChunk();
}
while (num < blockCount);
return allocMemoryBlock;
}
public void Dealloc(MemoryPool<T>.AllocMemoryBlock amb)
{
for (int i = 0; i < amb.mem.Length; i++)
{
MemoryPool<T>.MemoryBlock memoryBlock = amb.mem[i];
bool flag = memoryBlock != null;
if (flag)
{
MemoryPool<T>.MemoryChunk chunk = memoryBlock.chunk;
bool flag2 = chunk != null;
if (flag2)
{
uint num = 1u << (int)(memoryBlock.start / this.m_blockSize);
chunk.blockBit &= ~num;
}
amb.mem[i] = null;
bool flag3 = this.m_freeMemBlock == null;
if (flag3)
{
this.m_freeMemBlock = memoryBlock;
}
else
{
memoryBlock.next = this.m_freeMemBlock;
this.m_freeMemBlock = memoryBlock;
}
}
bool flag4 = this.m_freeAllocBlock == null;
if (flag4)
{
this.m_freeAllocBlock = amb;
}
else
{
amb.next = this.m_freeAllocBlock;
this.m_freeAllocBlock = amb;
}
}
}
}
}
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