Hi,
Attached is a patch for srfi-18 thread-sleep! to work for timeoutes less
than an second in the future.
Nate
>From 6ac6565c6add2dbbd18dc6ee30fd062ba4349fd9 Mon Sep 17 00:00:00 2001
From: Nathaniel Alderson <alder...@gmail.com>
Date: Thu, 19 Sep 2013 14:02:26 -0700
Subject: [PATCH] calculate usecs correctly in thread-sleep!
---
module/srfi/srfi-18.scm | 4 ++--
test-suite/tests/srfi-18.test | 8 +++++++-
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/module/srfi/srfi-18.scm b/module/srfi/srfi-18.scm
index 684a125..c394aef 100644
--- a/module/srfi/srfi-18.scm
+++ b/module/srfi/srfi-18.scm
@@ -236,7 +236,7 @@
(list timeout)
'()))))
(secs (inexact->exact (truncate t)))
- (usecs (inexact->exact (truncate (* (- t secs) 1000)))))
+ (usecs (inexact->exact (truncate (* (- t secs) 1000000)))))
(and (> secs 0) (sleep secs))
(and (> usecs 0) (usleep usecs))
*unspecified*))
@@ -380,4 +380,4 @@
(cons (inexact->exact fx)
(inexact->exact (truncate (* (- x fx) 1000000)))))))
-;; srfi-18.scm ends here
\ No newline at end of file
+;; srfi-18.scm ends here
diff --git a/test-suite/tests/srfi-18.test b/test-suite/tests/srfi-18.test
index 47f8f7f..ab05513 100644
--- a/test-suite/tests/srfi-18.test
+++ b/test-suite/tests/srfi-18.test
@@ -96,6 +96,12 @@
(let ((old-secs (car (current-time))))
(unspecified? (thread-sleep! (+ (time->seconds (current-time)))))))
+ (pass-if "thread sleeps fractions of a second"
+ (let* ((current (time->seconds (current-time)))
+ (future (+ current 0.5)))
+ (thread-sleep! future)
+ (>= (time->seconds (current-time)) future)))
+
(pass-if "thread does not sleep on past time"
(let ((past-time (seconds->time (- (time->seconds (current-time)) 2))))
(unspecified? (thread-sleep! past-time)))))
@@ -479,4 +485,4 @@
(eq? (uncaught-exception-reason obj) 'foo)
(set! success #t)))
(lambda () (thread-join! t)))
- success)))))
\ No newline at end of file
+ success)))))
--
1.8.1.4
