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manual: Add a comparative example of 'clock_nanosleep' use 

Add an illustrative example of how to express 'nanosleep' in terms of
'clock_nanosleep'.
This commit is contained in:
Maciej W. Rozycki 2025-06-06 18:14:34 +01:00
parent 09795c5612
commit 62fba6d980
1 changed files with 13 additions and 0 deletions
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manual/time.texi
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@ -3241,6 +3241,19 @@ different from @code{nanosleep}, which returns @math{-1} upon failure and
sets the global variable @code{errno} according to the error encountered sets the global variable @code{errno} according to the error encountered
instead. instead.
Except for the return value convention and the way to communicate an error
condition the call:
@smallexample
nanosleep (@var{requested_time}, @var{remaining_time})
@end smallexample
is analogous to:
@smallexample
clock_nanosleep (CLOCK_REALTIME, 0, @var{requested_time}, @var{remaining_time})
@end smallexample
The @var{clock} argument specifies the clock to use. The @var{clock} argument specifies the clock to use.
@xref{Getting the Time}, for the @code{clockid_t} type and possible values @xref{Getting the Time}, for the @code{clockid_t} type and possible values
of @var{clock}. Not all clocks listed are supported for use with of @var{clock}. Not all clocks listed are supported for use with