From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Wed, 17 Oct 2001 14:48:38 +0000 (+0000)
Subject: Limiting the Time::HiRes::sleep and usleep to
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=92bc48ca26b0fb2ba59389610ad13851aac4fcb8;p=p5sagit%2Fp5-mst-13.2.git

Limiting the Time::HiRes::sleep and usleep to
one second is not a good policy if drop-in
replacement is still a goal.

p4raw-id: //depot/perl@12473
---

diff --git a/ext/Time/HiRes/HiRes.pm b/ext/Time/HiRes/HiRes.pm
index 4e5244b..72fc606 100644
--- a/ext/Time/HiRes/HiRes.pm
+++ b/ext/Time/HiRes/HiRes.pm
@@ -106,9 +106,8 @@ seconds like Time::HiRes::time() (see below).
 =item usleep ( $useconds )
 
 Issues a usleep for the number of microseconds specified.  Returns the
-number of microseconds actually slept.  The number of microseconds
-B<must> be between 0 and 1_000_0000 (inclusive): you B<cannot> sleep
-a minute by usleep(60_000_000).  See also Time::HiRes::sleep() below.
+number of microseconds actually slept.  See also Time::HiRes::sleep()
+below.
 
 =item ualarm ( $useconds [, $interval_useconds ] )
 
diff --git a/ext/Time/HiRes/HiRes.t b/ext/Time/HiRes/HiRes.t
index a2cb206..e0f0cf7 100644
--- a/ext/Time/HiRes/HiRes.t
+++ b/ext/Time/HiRes/HiRes.t
@@ -223,9 +223,9 @@ unless (defined &Time::HiRes::setitimer
     $SIG{VTALRM} = 'DEFAULT';
 }
 
-$a = abs(sleep(1)                  - 1);
+$a = abs(sleep(1.5)                    - 1.5);
 print $a < 0.1 ? "ok 20 # $a\n" : "not ok 20 # $a\n";
 
-$a = abs(usleep(1000000) / 1000000 - 1);
+$a = abs(usleep(1_500_000) / 1_500_000 - 1.0);
 print $a < 0.1 ? "ok 21 # $a\n" : "not ok 21 # $a\n";
 
diff --git a/ext/Time/HiRes/HiRes.xs b/ext/Time/HiRes/HiRes.xs
index 395e2b9..3bb1aa4 100644
--- a/ext/Time/HiRes/HiRes.xs
+++ b/ext/Time/HiRes/HiRes.xs
@@ -369,21 +369,27 @@ constant(name, arg)
 
 #if defined(HAS_USLEEP) && defined(HAS_GETTIMEOFDAY)
 
-int
+NV
 usleep(useconds)
-        int useconds 
+        NV useconds
 	PREINIT:
 	struct timeval Ta, Tb;
 	CODE:
 	gettimeofday(&Ta, NULL);
 	if (items > 0) {
-	    if (useconds > 1000000)
-	        croak("usleep: useconds must be between 0 and 1000000 (inclusive)");
-	    usleep(useconds);
+	    if (useconds > 1E6) {
+		IV seconds = (IV) (useconds / 1E6);
+		sleep(seconds);
+		useconds -= 1E6 * seconds;
+	    }
+	    usleep((UV)useconds);
 	} else
 	    PerlProc_pause();
 	gettimeofday(&Tb, NULL);
-	RETVAL = 1000000*(Tb.tv_sec-Ta.tv_sec)+(Tb.tv_usec-Ta.tv_usec);
+#if 0
+	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
+#endif
+	RETVAL = 1E6*(Tb.tv_sec-Ta.tv_sec)+(NV)((IV)Tb.tv_usec-(IV)Ta.tv_usec);
 
 	OUTPUT:
 	RETVAL
@@ -394,11 +400,17 @@ sleep(...)
 	struct timeval Ta, Tb;
 	CODE:
 	gettimeofday(&Ta, NULL);
-	if (items > 0)
-	    usleep((int)(SvNV(ST(0)) * 1000000));
-	else
+	if (items > 0) {
+	    NV seconds  = SvNV(ST(0));
+	    IV useconds = 1E6 * (seconds - (IV)seconds);
+	    sleep(seconds);
+	    usleep(useconds);
+	} else
 	    PerlProc_pause();
 	gettimeofday(&Tb, NULL);
+#if 0
+	printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
+#endif
 	RETVAL = (NV)(Tb.tv_sec-Ta.tv_sec)+0.000001*(NV)(Tb.tv_usec-Ta.tv_usec);
 
 	OUTPUT: