void HeartBeat_Check_TASK(void *pdata)
{
struct timeval tv;
struct timespec ts;
int err;
U32 dwcount=0;
INT32U pend_time,coll_time_now,check_time,check_time_past;;
INT32S timeout;
struct tm *p=NULL;
TIME_STRUC rtime={0};
coll_time_now = NOW_TIME_MS;
while(1)
{
pend_time = NOW_TIME_MS;
//printf(" pend_time %d,coll_time_now %d ",pend_time,coll_time_now);
timeout = ALARM_COLLECT_0P2SEC - (pend_time - coll_time_now); // - MCP_PROCESS_TIME_MAX;
//这OSSemPend函数pend 时间是以tick为单位,timeout原本是毫秒,但是在调用这个函数时被变成了TICK
//OSSemPend(mLDARecvSem, timeout, &err);
if(timeout <= 0)
{
timeout = 1;
}
gettimeofday(&tv, NULL); /* 获取当前时间 */
timeraddMS(&tv,timeout);
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000;
do{
//tv.tv_sec=0;
//tv.tv_usec=timeout*1000;
//err=select(0,NULL,NULL,NULL,&tv);
err=sem_timedwait(&mHeartTimeOutSem, &ts);
}while(err<0 && errno==EINTR);
check_time = NOW_TIME_MS;
if(check_time-check_time_past<ALARM_COLLECT_0P2SEC)
continue;
check_time_past=NOW_TIME_MS;
RPT_SendReportMessageHeartBeat();
coll_time_now=coll_time_now+ALARM_COLLECT_0P2SEC;
}
}
ALARM_COLLECT_0P2SEC是补时间用的;
计时:
gettimeofday(&tv, NULL); /* 获取当前时间 */
timeraddMS(&tv,timeout);
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000;
do{
//tv.tv_sec=0;
//tv.tv_usec=timeout*1000;
//err=select(0,NULL,NULL,NULL,&tv);
err=sem_timedwait(&mHeartTimeOutSem, &ts);
}while(err<0 && errno==EINTR);
注意:如果修改系统时间过快,可能会延时到来很快且多次,之后才能恢复正常;
补充:需要加个自带时间计时,判断,防止信号量计时受系统时间修改影响。