我需要初始化一个 Posix 计时器,我让它工作,但有点奇迹。我不明白工作和代码之间的区别给我分段错误。
这是 create_timer 函数的头文件:
int timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid);
请告诉我版本2和3有什么区别?
此外,鉴于 3 有效,版本 1 甚至如何编译?
显然, timer_create 的第三个参数在 v1 和 v3 中是不同的,但它们都可以编译。
此代码失败:(但编译)
main():
timer_t *tidlist;
tidlist = calloc(2, sizeof(timer_t));
initialize_timer(tidlist[0], 2);
int initialize_timer(timer_t *tid, int seconds){
if (timer_create(CLOCK_REALTIME, &sev, tid) == -1) <----- seg fault here. but it should not even compile because the working version accepts the **timer_t as argument.
这甚至不编译:(即使它完全相同的东西是有效的)
main():
timer_t *tidlist;
tidlist = calloc(2, sizeof(timer_t));
initialize_timer(tidlist[0], 2);//initilize timer for producer
initialize_timer(timer_t *tid, int seconds):
if (timer_create(CLOCK_REALTIME, &sev, &tid) == -1) <------- type error for 3 arg: incompatible pointer type.
此代码有效:
main():
timer_t *tidlist;
tidlist = calloc(2, sizeof(timer_t));
initialize_timer(tidlist, 2);//initilize timer for producer
int initialize_timer(timer_t *tidlist, int seconds){
if (timer_create(CLOCK_REALTIME, &sev, &tidlist[0]) == -1)
提前致谢。