DELAY(9)DELAY(9)
NAME
delay, microdelay, addclock0link – small delays, clock interrupts
SYNOPSIS
void delay(int ms)
void microdelay(int µs)
Timer* addclock0link(void(*clockf)(void), int ms)
DESCRIPTION
Delay
busy waits for
ms
milliseconds. The minimum value of
ms
is one on most architectures.
Microdelay
works exactly the same as
delay
but using microseconds instead.
These routines are intended for use in interrupt contexts,
device reset and shutdown functions, and other places where
the scheduler is unavailable.
When you have a process context, and can sleep, consider
tsleep(9).
Tsleep
does not busy wait.
Addclock0link
adds a new periodic timer to the current processor’s timer list, with
clockf
executing every
ms
milliseconds. If
ms
is zero a default clock is used, it will panic otherwise (i.e.
ms
< 0).
SOURCE
/sys/src/9/port/portclock.c
/sys/src/9/*/clock.c
SEE
sleep(9)