$NetBSD: patch-ab,v 1.1.1.1 2007/07/17 19:18:44 drochner Exp $

--- fifo.cpp.orig	2007-07-17 14:50:26.000000000 +0200
+++ fifo.cpp
@@ -306,10 +306,14 @@ int sleep_until_start_request_or_inactiv
 	   to.tv_sec, to.tv_nsec,
 	   ts.tv_sec, ts.tv_nsec);
       
-      while ((err = sem_timedwait(&my_sem_start_is_required, &ts)) == -1 
-	     && errno == EINTR)
+      while ((err = sem_trywait(&my_sem_start_is_required)) == -1 
+	     && (errno == EINTR || errno == EAGAIN))
 	{
-	      continue;
+		struct timespec help;
+		clock_gettime2(&help);
+		if (timespeccmp(&help, &ts, >=))
+			break;
+		sched_yield();
 	}
       
       assert (gettimeofday(&tv, NULL) != -1);