本文整理汇总了C++中attotime::is_never方法的典型用法代码示例。如果您正苦于以下问题：C++ attotime::is_never方法的具体用法？C++ attotime::is_never怎么用？C++ attotime::is_never使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类attotime的用法示例。
在下文中一共展示了attotime::is_never方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: feed_read_data
int fdc_pll_t::feed_read_data(attotime &tm, const attotime& edge, const attotime &limit)
{
attotime next = ctime + period + phase_adjust;
#if 0
if(!edge.is_never())
fprintf(stderr, "ctime=%s, transition_time=%s, next=%s, pha=%s\n", tts(ctime).c_str(), tts(edge).c_str(), tts(next).c_str(), tts(phase_adjust).c_str());
#endif
if(next > limit)
return -1;
ctime = next;
tm = next;
if(edge.is_never() || edge > next) {
// No transition in the window means 0 and pll in free run mode
phase_adjust = attotime::zero;
return 0;
}
// Transition in the window means 1, and the pll is adjusted
attotime delta = edge - (next - period/2);
if(delta.seconds() < 0)
phase_adjust = attotime::zero - ((attotime::zero - delta)*65)/100;
else
phase_adjust = (delta*65)/100;
if(delta < attotime::zero) {
if(freq_hist < 0)
freq_hist--;
else
freq_hist = -1;
} else if(delta > attotime::zero) {
if(freq_hist > 0)
freq_hist++;
else
freq_hist = 1;
} else
freq_hist = 0;
if(freq_hist) {
int afh = freq_hist < 0 ? -freq_hist : freq_hist;
if(afh > 1) {
attotime aper = attotime::from_double(period_adjust_base.as_double()*delta.as_double()/period.as_double());
period += aper;
if(period < min_period)
period = min_period;
else if(period > max_period)
period = max_period;
}
}
return 1;
}