X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fqueue.h;h=e30b84c54e140f08a83386999fe25e8f2a9d4942;hb=a23aab1fc2f66b63ba9b7e4b9c9a8f6d58c367d0;hp=e94d20c468488e4d4d28661d088bbf516afed6e4;hpb=34e63086edddcae06d7c1a4fa84fec0861e50758;p=openvswitch

diff --git a/lib/queue.h b/lib/queue.h
index e94d20c4..e30b84c5 100644
--- a/lib/queue.h
+++ b/lib/queue.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,9 @@
 #ifndef QUEUE_H
 #define QUEUE_H 1
 
+#include <stdbool.h>
+#include <stddef.h>
+
 /* Packet queue. */
 struct ovs_queue {
     int n;                      /* Number of queued packets. */
@@ -24,6 +27,8 @@ struct ovs_queue {
     struct ofpbuf *tail;        /* Last queued packet, null if n == 0. */
 };
 
+#define OVS_QUEUE_INITIALIZER { 0, NULL, NULL }
+
 void queue_init(struct ovs_queue *);
 void queue_destroy(struct ovs_queue *);
 void queue_clear(struct ovs_queue *);
@@ -31,4 +36,9 @@ void queue_advance_head(struct ovs_queue *, struct ofpbuf *next);
 void queue_push_tail(struct ovs_queue *, struct ofpbuf *);
 struct ofpbuf *queue_pop_head(struct ovs_queue *);
 
+static inline bool queue_is_empty(const struct ovs_queue *q)
+{
+    return q->n == 0;
+}
+
 #endif /* queue.h */