Commonly used macro records

Incoming type:

#define min_t(type,x,y) \
    ({ \
        type __x = (x); \
        type __y = (y); \
        __x < __y ? __x:__y;/* 结果返回 */ \  
    })

No incoming type:

#define min(x,y)  \
    ({    \
          const typeof(x) _x = (x); \
          const typeof(y) _y = (y); \
          (void) (&_x == &_y); /* 检查类型是否一致 */\
          _x < _y ? _x : _y; /* 返回结果 */ \
    })

Function name prints:

void test(){
    printf("this is function:%s\n", __FUNCTION__);
}

/* 执行结果打印 this is function:test */

do{} while(0) statement macro:

#define SAFE_FREE(p) \
    do{    \
        if(p == NULL) break;    \
        free(p);    \
        p = NULL;    \
    }while(0)

goto statement: It is easier to handle errors in the main application scenarios.