netbsd man page for delay

Query: delay

OS: netbsd

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

DELAY(9)						   BSD Kernel Developer's Manual						  DELAY(9)

NAME
delay, DELAY -- microsecond delay
SYNOPSIS
#include <machine/param.h> void delay(unsigned int us); void DELAY(unsigned int us);
DESCRIPTION
Wait approximately us microseconds. The delay is implemented as a machine loop, preventing events other than interrupt handlers for unmasked interrupts to run. DELAY() is reen- trant (doesn't modify any global kernel or machine state) and is safe to use in interrupt or process context. For long delays, condition variables should be considered, however they can only be used from process context and their resolution is limited by the system clock frequency.
SEE ALSO
condvar(9), hz(9), kpause(9)
BSD
July 20, 2011 BSD
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