c++ 内存池的实现

平常我们在使用malloc申请内存时，频繁的申请小块内存会造成内存的浪费，所以可以使用内存池来减少内存的浪费。

memory_pool.h

#ifndef MEMORY_POOL
#define MEMORY_POOL

#include 

#define size 20
#define numsize 10

class freenode
{
public:
    char data[size];
    struct obj
    {
        struct obj *next;
    };
};

class memblock
{
public:
    freenode data[numsize];
    memblock *next;
};

class mem_pool
{
public:
    mem_pool();
    ~mem_pool();
    void* malloc(int m_size);
    void free(void* p);
private:
    freenode *nodehead;
    memblock *blockhead;
};

#endif

memory_pool.cpp

#include "memory_pool.h"

mem_pool::mem_pool()
{
    nodehead = NULL;
    blockhead = NULL;
}

mem_pool::~mem_pool()
{
    memblock* temp = NULL;
    while(blockhead != NULL)
    {
        temp = blockhead;
        blockhead = blockhead->next;
        delete temp;
        temp = NULL; 
    }