47 lines
899 B
Plaintext
47 lines
899 B
Plaintext
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.TH DELAY 9
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.SH NAME
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delay, microdelay, addclock0link \- small delays, clock interrupts
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.SH SYNOPSIS
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.ta \w'\fLTimer* 'u
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.B
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void delay(int ms)
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.PP
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.B
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void microdelay(int µs)
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.PP
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.B
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Timer* addclock0link(void(*clockf)(void), int ms)
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.SH DESCRIPTION
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.I Delay
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busy waits for
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.I ms
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milliseconds, forced to be at least one millisecond on some architectures.
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.PP
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.I Microdelay
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works exactly the same as
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.I delay
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but using microseconds instead.
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.PP
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For delays on the order of clock ticks,
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.I tsleep
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(see
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.IR sleep (9))
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provides a better alternative to the busy waiting of these routines.
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.PP
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.I Addclock0link
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adds a new periodic timer to the current processor's timer list, with
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.I clockf
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executing every
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.I ms
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milliseconds. If
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.I ms
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is zero a default clock is used, it will panic otherwise (i.e.
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.I ms
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< 0).
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.SH SOURCE
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.B /sys/src/9/port/portclock.c
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.br
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.B /sys/src/9/*/clock.c
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.SH SEE ALSO
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.IR sleep (9)
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