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From: David Xu <davidxu@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Subject: PERFORCE change 68292 for review
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http://perforce.freebsd.org/chv.cgi?CH=68292

Change 68292 by davidxu@davidxu_celeron on 2005/01/05 05:13:10

	in trywait, replace `if' with `while'.

Affected files ...

.. //depot/projects/davidxu_thread/src/lib/libthread/thread/thr_sem.c#5 edit

Differences ...

==== //depot/projects/davidxu_thread/src/lib/libthread/thread/thr_sem.c#5 (text+ko) ====

@@ -119,7 +119,7 @@
 	if ((*sem)->syssem != 0)
  		return (ksem_trywait((*sem)->semid));
 
-	if ((val = (*sem)->count) > 0) {
+	while ((val = (*sem)->count) > 0) {
 		if (atomic_cmpset_acq_int(&(*sem)->count, val, val - 1))
 			return (0);
 	}