简单的内存池实现(非线程安全)

#pragma once

template<typename T,std::size_t nNum>
class CMemPool
{
public:
CMemPool(){ Init();}
~CMemPool() { Fini();}
T* GetElement();
void ReleaseElement(T* t1);
void Init();
void Fini();

protected:
std::list<T*> m_list;
};

template<typename T,std::size_t nNum>
void CMemPool<T,nNum>::Init()
{
for (size_t i=0; i<nNum; i++)
{
T* t1 = new T;
if (t1 != NULL)
{
m_list.push_back(t1);
}
}
}

template<typename T,std::size_t nNum>
void CMemPool<T,nNum>::Fini()
{
std::list<T*>::iterator it = m_list.begin();
for (; it != m_list.end();)
{
T* tTmp = *it;
it = m_list.erase(it);
if (tTmp != NULL)
delete tTmp;
}
}

template<typename T,std::size_t nNum>
T* CMemPool<T,nNum>::GetElement()
{
if (m_list.size() == 0)
Init();

std::list<T*>::iterator it = m_list.begin();
T* t1 = NULL;
for(; it != m_list.end();)
{
if (*it == NULL)
{
it = m_list.erase(it);
}
else
{
t1 = *it;
m_list.erase(it);
break;
}
}

return t1;
}

template<typename T,std::size_t nNum>
void CMemPool<T,nNum>::ReleaseElement(T* t1)
{
if (t1 != NULL)
m_list.push_back(t1);
}