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Document clock(3) as obsolete.

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Jonas 'Sortie' Termansen 2016-09-28 20:24:10 +02:00
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doc/obsolete-stuff
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@ -53,6 +53,20 @@ similarly poorly named flag O_CREAT that does what you need.
Sortix currently implement this function for compatibility reasons.
clock
-----
The clock() function suffers from overflow issues where it wraps around and the
caller has to handle that, meaning it's not suitable for measuring long
intervals. Converting a clock interval to seconds it also bothersome and
requires division by CLOCKS_PER_SEC.
You should use clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts) instead as it has no
overflow issues, provides nanosecond precision if available, and can be combined
with APIs such as Sortix's <timespec.h> for convenient computing.
Sortix currently implements this function for compatibility reasons.
ctime, ctime_r
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