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nap(S-osr5)


nap -- suspends execution for a short interval

Syntax

cc . . . -lc

long nap (period)
long period;

Description

The current process is suspended from execution for at least the number of milliseconds specified by period, or until a signal is received.

Return value

On successful completion, a long integer indicating the number of milliseconds actually slept is returned. If the process received a signal while napping, -1 is returned, and errno is set to EINTR.

Differences between versions

For operating system releases prior to SCO OpenServer Release 5.0.6, which implements the high-performance system clock described on the clock(HW) manual page, this function is driven by the system clock, which in most cases has a granularity of 10 millisecond (1/100 second) units.

See also

sleep(S-osr5)

Standards conformance

nap is not part of any currently supported standard; it is an extension of AT&T System V provided by the Santa Cruz Operation.
© 2005 The SCO Group, Inc. All rights reserved.
SCO OpenServer Release 6.0.0 -- 02 June 2005