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NAME
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sleep, alarm – delay, ask for delayed note
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SYNOPSIS
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#include <u.h>
#include <libc.h>
int sleep(long millisecs)
long alarm(unsigned long millisecs)
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DESCRIPTION
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Sleep suspends the current process for the number of milliseconds
specified by the argument. The actual suspension time may be a
little more or less than the requested time. If millisecs is 0,
the process gives up the CPU if another process is waiting to
run, returning immediately if not. Sleep returns –1 if interrupted,
0 otherwise.
Alarm causes an alarm note (see notify(3)) to be sent to the invoking
process after the number of milliseconds given by the argument.
Successive calls to alarm reset the alarm clock. A zero argument
clears the alarm. The return value is the amount of time previously
remaining in the alarm clock.
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SOURCE
SEE ALSO
DIAGNOSTICS
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These functions set errstr.
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BUGS
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To avoid name conflicts with the underlying system, sleep and
alarm are preprocessor macros defined as p9sleep and p9alarm;
see intro(3).
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