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ref: a920c765f2b4130590fb5971a50690b21664957a
dir: /man/2/sys-sleep/

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.TH SYS-SLEEP 2
.SH NAME
sleep \- delay
.SH SYNOPSIS
.EX
include "sys.m";
sys := load Sys Sys->PATH;

sleep:	fn(period: int): int;
.EE
.SH DESCRIPTION
.B Sleep
suspends the current thread for
.I period
milliseconds.
The actual suspension time may be a little more or less than
the requested time.
If
.I period
is 0, the process
gives up the CPU if another process is waiting to run, returning
immediately if not.
.PP
.B Sleep
normally returns 0. In hosted Inferno it may return -1 to indicate that
it was not possible to sleep (eg if no more threads are available).
.SH SEE ALSO
.IR sys-intro (2),
.IR sys-millisec (2)