宏定义

宏定义

宏定义

常量宏定义

#define pi 3.14
#define x y

函数宏定义

#define MAX(x,y) ({x>y? x:y})
#define for_each_vector(x,y) for(int i = 0;i<x.size();i++)

#define for_each_cpu(cpu, mask)             \
    for ((cpu) = -1;                \
        (cpu) = cpumask_next((cpu), (mask)),    \
        (cpu) < nr_cpu_ids;)
#define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask)

for_each_possible_cpu(cpu) {
    const u32 *rate;
    int len;

    /* too early to use cpu->of_node */
    cn = of_get_cpu_node(cpu, NULL);
    if (!cn) {
        pr_err("missing device node for CPU %d\n", cpu);
        continue;
    }
......

posted @ 2019-03-16 14:36 TriAlley 阅读( ...) 评论( ...) 编辑 收藏