wow-countdown倒计时操作说明

wow-countdown文件说明

• 项目地址：https://github.com/wow-iot3/wow_linux_eval
• 本文件的功能主要用于处理定时器操作，主要涉及申请、释放、复位与置数、查询剩余时间、查询是否超时；

申请倒计时

CountDown_T* wow_cdown_new(void) { CountDown_T* cdown = CALLOC(1,CountDown_T); CHECK_RET_VAL_P(cdown,NULL,"malloc CountDown_T failed!\n"); cdown->time = (struct timeval){0, 0}; return cdown; } void wow_cdown_free(CountDown_T** pptCdown) { CHECK_RET_VOID(pptCdown && *pptCdown); FREE(*pptCdown); *pptCdown = NULL; }

倒计时参数置0

void wow_cdown_reset(CountDown_T* ptCdown) { CHECK_RET_VOID(ptCdown); ptCdown->time = (struct timeval){0, 0}; }

倒计时参数置数

void wow_cdown_set(CountDown_T* ptCdown, size_t nMsec) { CHECK_RET_VOID(ptCdown); struct timeval now; gettimeofday(&now, NULL); struct timeval interval = {nMsec / 1000, (nMsec % 1000) * 1000}; timeradd(&now, &interval, &ptCdown->time); }

查询倒计时剩余时间

int wow_cdown_remain(CountDown_T* ptCdown) { CHECK_RET_VAL(ptCdown,0); struct timeval now, res; gettimeofday(&now, NULL); timersub(&ptCdown->time, &now, &res); return (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000; }

判断倒计时是否超时

int wow_cdown_is_expired(CountDown_T* ptCdown) { CHECK_RET_VAL(ptCdown,0); struct timeval now, res; gettimeofday(&now, NULL); timersub(&ptCdown->time, &now, &res); return ((res.tv_sec < 0) || (res.tv_sec == 0 && res.tv_usec <= 0)); }