time units and types in phobos

February 28, 2005
Re: time units and types in phobos
Posted by Kris
in reply to Ben Hinkle
Permalink
Kris
Posted in reply to Ben Hinkle
Permalink
In article <cvvrdn$dq6$1@digitaldaemon.com>, Ben Hinkle says...
>
>Reading the doc for std.socker I noticed it defines timeval. Time units and data types are typically hard to standardize. Some functions take milliseconds, some take micro, some take ints some take longs and some take timevals (or timespecs, too?). Remembering which takes what is a pain. What do people think of making a std module (or maybe reusing std.date) for time-related types and functions? I'm thinking of something along the lines of the attached module (modified from my locks library) which is based on Java's TimeUnit: http://java.sun.com/j2se/1.5.0/docs/api/java/util/concurrent/TimeUnit.html
>
>Any objections to writing up some doc and asking Walter to include in phobos?


No objection, but there's an equivalent in Mango also.


>
>To illustrate the API here are the unittests:
>
>  sleep(2,sec);
>  sleep(toTimeval(30,msec));
>
>  assert( toMillis(100,sec) == 100_000 );
>  assert( toMicros(100,sec) == 100_000_000 );
>  assert( toNanos(100,sec) == 100_000_000_000 );
>  assert( toSeconds(100,sec) == 100 );
>  assert( convert(100,sec,msec) == 100_000 );
>  assert( toMicros(5_000,nsec) == 5 );
>  assert( toSeconds(5_000_000,usec) == 5 );
>  assert( toSeconds(50,usec) == 0 );
>  assert( toNanos(5_000_000_000_000,sec) == long.max );
>
>  timeval tv = toTimeval(100,sec);
>  assert( tv.seconds == 100 );
>  assert( tv.microseconds == 0 );
>  assert( toMillis(tv) == 100_000 );
>  assert( toMicros(tv) == 100_000_000 );
>  assert( toNanos(tv) == 100_000_000_000 );
>  timeval tv2;
>  tv2.seconds = 5;
>  tv2.microseconds = 7;
>  assert( toMicros(tv2) == 5_000_007 );
>  assert( toMicros(tv2 + tv) == 105_000_007 );
>  assert( toMicros(tv2 - tv) == -94999993 );
>
>-Ben
>
>
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>end
>
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