X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=sched.c;h=5c1857151ffd3d2efd26c5780056a513e1ed1ad0;hp=14346ec0e1c411ab08da2ddbdc85073d6945615b;hb=11ef83c4abb2ccbdf3f99a8adf98749b2b0656c2;hpb=4fcc1b13adffb4c9d320fbef2fe4e9b75dd2c5f9

diff --git a/sched.c b/sched.c
index 14346ec0..5c185715 100644
--- a/sched.c
+++ b/sched.c
@@ -120,6 +120,16 @@ again:
 	ret = s->select_function(s->max_fileno + 1, &s->rfds, &s->wfds, &s->timeout);
 	if (ret < 0)
 		return ret;
+	if (ret == 0) {
+		/*
+		 * APUE: Be careful not to check the descriptor sets on return
+		 * unless the return value is greater than zero. The return
+		 * state of the descriptor sets is implementation dependent if
+		 * either a signal is caught or the timer expires.
+		 */
+		FD_ZERO(&s->rfds);
+		FD_ZERO(&s->wfds);
+	}
 	gettimeofday(now, NULL);
 	sched_post_select(s);
 	if (list_empty(&pre_select_list) && list_empty(&post_select_list))
@@ -269,3 +279,14 @@ void sched_request_timeout_ms(long unsigned ms, struct sched *s)
 	ms2tv(ms, &tv);
 	sched_request_timeout(&tv, s);
 }
+
+void sched_request_barrier(struct timeval *barrier, struct sched *s)
+{
+	struct timeval diff;
+
+	if (tv_diff(now, barrier, &diff) > 0)
+		return;
+	sched_request_timeout(&diff, s);
+}
+
+