常用宏记录

传入类型:

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

无传入类型:

#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 */ \
    })

函数名打印:

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

/* 执行结果打印 this is function:test */

do{} while(0)语句宏:

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

goto语句:        主要应用场景 错误处理较为容易.

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转载自blog.csdn.net/u011624093/article/details/119107761