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diff --git a/contrib/pf/libevent/event-internal.h b/contrib/pf/libevent/event-internal.h
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+++ b/contrib/pf/libevent/event-internal.h
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+/*
+ * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _EVENT_INTERNAL_H_
+#define _EVENT_INTERNAL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct event_base {
+	const struct eventop *evsel;
+	void *evbase;
+	int event_count;		/* counts number of total events */
+	int event_count_active;	/* counts number of active events */
+
+	int event_gotterm;		/* Set to terminate loop */
+
+	/* active event management */
+	struct event_list **activequeues;
+	int nactivequeues;
+
+	struct event_list eventqueue;
+	struct timeval event_tv;
+
+	RB_HEAD(event_tree, event) timetree;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _EVENT_INTERNAL_H_ */