函数

ManagePool_Memory_Create

功能

创建一个内存池

语法

XMPOOL ManagePool_Memory_Create(size_t nSize = 4096, size_t nEstimateSize = 102400, size_t nMaxSize = 256)

参数

参数.一：nSize
In/Out：In
类型：无符号整数型
可空：N
意思：要初始化内存池的大小
参数.二：nEstimateSize
In/Out：In
类型：无符号整数型
可空：Y
意思：预测单个内存最大大小,为0不启用内存预测
参数.三：nMaxSize
In/Out：In
类型：无符号整数型
可空：Y
意思：最大允许内存池大小,超过将无法允许申请内存,为0 不启用,单位MB

返回值

类型：内存池句柄
意思：成功返回句柄，失败返回NULL

备注

内存池非线程安全

示例

int 
MemoryPool_Test()
{
    XMPOOL 
xmPool;
    MANAGEPOOL_MEMORY_CLEANUP 
st_Cleanup;

    char* p1, * p2, * p3, 
* p4;

    xmPool = 
ManagePool_Memory_Create();
    p1 = (char*)ManagePool_Memory_Alloc(xmPool, 416); /*分配内存，在可分配内*/
    memcpy(p1, 
"p1", 
2);
    printf("%s\n", 
p1);

    p2 = (char*)ManagePool_Memory_Alloc(xmPool, 200);/*分配内存，在可分配内，但pool中没有足够的内存空间*/
    memcpy(p2, 
"p2", 
2);
    printf("%s\n", 
p2);

    ManagePool_Memory_Free(xmPool, 
p1);
    ManagePool_Memory_Free(xmPool, 
p2);

    p3 = (char*)ManagePool_Memory_Alloc(xmPool, 624);//分配大内存
    memcpy(p3, 
"p3", 
2);
    printf("%s\n", 
p3);

    p4 = (char*)ManagePool_Memory_Alloc(xmPool, 100);//分配内存
    memcpy(p4, 
"p4", 
2);
    printf("%s\n", 
p4);

    char* p5 = 
(char*)ManagePool_Memory_Alloc(xmPool, 4000);//分配内存
    memcpy(p5, 
"p5", 
2);
    printf("%s,%s\n", p5, 
p4);

    char* p6 = 
(char*)ManagePool_Memory_Alloc(xmPool, 5000);//分配大内存
    memcpy(p6, 
"p6", 
2);
    printf("%s,%s\n", p6, 
p4);

    ManagePool_Memory_Free(xmPool, 
p6);
    char* p7 = 
(char*)ManagePool_Memory_Alloc(xmPool, 5000);//分配大内存
    memcpy(p7, 
"p7", 
2);
    printf("%s,%s,%s\n", p7, p4, 
p5);

    st_Cleanup.fpCall_Cleanup = 
&fun;
    ManagePool_Memory_CleanupAdd(xmPool, 
&st_Cleanup);/*注册销毁回调函数*/

    ManagePool_Memory_Destory(xmPool);/*pool池注销*/
    printf("\n");
    return 0;
}