This site is a static rendering of the Trac instance that was used by R7RS-WG1 for its work on R7RS-small (PDF), which was ratified in 2013. For more information, see Home. For a version of this page that may be more recent, see TimeCowan in WG2's repo for R7RS-large.

Time­Cowan

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2010-11-09 05:12:04
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Time

(current-time)

Returns a rational number representing the current number of milliseconds (excluding milliseconds during a leap second) since the Posix Epoch, which is 00:00:00 on 1 January 1970, Coordinated Universal Time. Implementations SHOULD return a value that is as precise and accurate as possible. Implementations MAY return exact or inexact values, and SHOULD return inexact values unless:

In practice this means that implementations with fixnums greater than 253 should return fixnums unless they have time-of-day clocks that provide more than 1 ms precision, and all other implementations should return IEEE 64-bit floats.

Advanced Time (WG2)

See TimeAdvancedCowan.

Time Durations and Periods (WG2)

See TimePeriodsCowan.