Wait on a task coordination event. Wait forever with timeout of zero,
poll with timeout of -1, or wait timeout micro seconds.
Source: ../mlexec.c.html#EventPend
Sleep at least delay_usec micro seconds, subject to 10 millisec system
tick granularity, etc.
Source: ../mlexec.c.html#TaskDelayUSec
int ReadYield( int fd, int delay_usec )
Wait at least delay_usec micro seconds for input to appear on the
file descriptor, subject to 10 millisec system tick granularity, etc.
Not real time, but is real handy.
Wait forever if delay_usec is zero.
And yield to other tasks in the meantime.
Source: ../mlexec.c.html#ReadYield