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[sleep] 加入调度器尚未运行时的延时情况 #4800

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Merged
merged 1 commit into from
Jun 16, 2021
Merged

[sleep] 加入调度器尚未运行时的延时情况 #4800

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24 changes: 16 additions & 8 deletions components/libc/compilers/common/unistd.c
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Original file line number Diff line number Diff line change
Expand Up @@ -37,19 +37,26 @@ RTM_EXPORT(isatty);

char *ttyname(int fd)
{
return "/dev/tty"; /*TODO: need to add more specific*/
return "/dev/tty"; /* TODO: need to add more specific */
}
RTM_EXPORT(ttyname);

unsigned int sleep(unsigned int seconds)
{
rt_tick_t delta_tick;

delta_tick = rt_tick_get();
rt_thread_delay(seconds * RT_TICK_PER_SECOND);
delta_tick = rt_tick_get() - delta_tick;
if (rt_thread_self() != RT_NULL)
{
rt_thread_delay(seconds * RT_TICK_PER_SECOND);
}
else /* scheduler has not run yet */
{
while(seconds > 0)
{
rt_hw_us_delay(1000000u);
seconds --;
}
}

return seconds - delta_tick/RT_TICK_PER_SECOND;
return 0;
}
RTM_EXPORT(sleep);

Expand All @@ -59,11 +66,12 @@ int usleep(useconds_t usec)
{
rt_thread_mdelay(usec / 1000u);
}
else
else /* scheduler has not run yet */
{
rt_hw_us_delay(usec / 1000u);
}
rt_hw_us_delay(usec % 1000u);

return 0;
}
RTM_EXPORT(usleep);
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