From: Chris Hanson <org/chris-hanson/cph>
Date: Tue, 28 Nov 1989 01:28:19 +0000 (+0000)
Subject: When interconverting ticks and seconds, represent seconds as inexact
X-Git-Tag: 20090517-FFI~11661
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=3f7145e49d38f05df1b790e629a7876644bcaab6;p=mit-scheme.git

When interconverting ticks and seconds, represent seconds as inexact
numbers and ticks as exact integers.
---

diff --git a/v7/src/runtime/sysclk.scm b/v7/src/runtime/sysclk.scm
index f4632de24..45397af78 100644
--- a/v7/src/runtime/sysclk.scm
+++ b/v7/src/runtime/sysclk.scm
@@ -1,8 +1,8 @@
 #| -*-Scheme-*-
 
-$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/runtime/sysclk.scm,v 14.1 1988/06/13 11:57:59 cph Rel $
+$Header: /Users/cph/tmp/foo/mit-scheme/mit-scheme/v7/src/runtime/sysclk.scm,v 14.2 1989/11/28 01:28:19 cph Rel $
 
-Copyright (c) 1988 Massachusetts Institute of Technology
+Copyright (c) 1988, 1989 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -71,11 +71,11 @@ MIT in each case. |#
 	    (increment-non-runtime! (- end start)))
 	(receiver (process->system-time end))))))
 
-(define-integrable (process->system-time ticks)
+(define (process->system-time ticks)
   (internal-time/ticks->seconds (- ticks offset-time)))
 
-(define-integrable (internal-time/ticks->seconds ticks)
-  (/ ticks 1000))
+(define (internal-time/ticks->seconds ticks)
+  (/ (exact->inexact ticks) 1000))
 
-(define-integrable (internal-time/seconds->ticks seconds)
-  (* seconds 1000))
\ No newline at end of file
+(define (internal-time/seconds->ticks seconds)
+  (round->exact (* seconds 1000)))
\ No newline at end of file