;;; time.scm --- The R7RS time library

;;      Copyright (C) 2013, 2014 Free Software Foundation, Inc.
;;
;; This library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public
;; License as published by the Free Software Foundation; either
;; version 3 of the License, or (at your option) any later version.
;;
;; This library is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; Lesser General Public License for more details.
;;
;; You should have received a copy of the GNU Lesser General Public
;; License along with this library; if not, write to the Free Software
;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA


(define-library (scheme time)
  (export current-second current-jiffy jiffies-per-second)
  (import (scheme base)
          (srfi srfi-19)
          (rename (only (guile)
                        internal-time-units-per-second
                        get-internal-real-time)
                  (get-internal-real-time current-jiffy)))
  (begin
    (define (current-second)
      (let ((time (current-time time-tai)))
        (+ (time-second time)
           (* 1e-9 (time-nanosecond time)))))
    (define (jiffies-per-second)
      internal-time-units-per-second)))