SLEEP(2) System Calls Manual SLEEP(2)
NAME
sleep, alarm - delay, ask for delayed note
SYNOPSIS
#include <u.h>
#include <libc.h>
int sleep(long millisecs)
long alarm(unsigned long millisecs)
DESCRIPTION
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 imme-
diately if not. Sleep returns -1 if interrupted, 0 otherwise.
Alarm causes an alarm note (see notify(2)) to be sent to the invoking process after the number of milliseconds given by the argument. Suc-
cessive calls to alarm reset the alarm clock. A zero argument clears the alarm. The return value is the amount of time previously remain-
ing in the alarm clock.
SOURCE
/sys/src/libc/9syscall
SEE ALSO
intro(2)
DIAGNOSTICS
These functions set errstr.
SLEEP(2)
