run sphinx-quickstart

[fio.git] / io_u_queue.h

diff --git a/io_u_queue.h b/io_u_queue.h
index 5b6cad0ef173926f1ff0e259bac560f2a69d1d83..118e59342b5da4bd814be51aa7f561d519603838 100644 (file)
--- a/io_u_queue.h
+++ b/io_u_queue.h
@@ -8,22 +8,33 @@ struct io_u;
 struct io_u_queue {
        struct io_u **io_us;
        unsigned int nr;
+       unsigned int max;
 };
 
 static inline struct io_u *io_u_qpop(struct io_u_queue *q)
 {
-       if (q->nr)
-               return q->io_us[--q->nr];
+       if (q->nr) {
+               const unsigned int next = --q->nr;
+               struct io_u *io_u = q->io_us[next];
+
+               q->io_us[next] = NULL;
+               return io_u;
+       }
 
        return NULL;
 }
 
 static inline void io_u_qpush(struct io_u_queue *q, struct io_u *io_u)
 {
-       q->io_us[q->nr++] = io_u;
+       if (q->nr < q->max) {
+               q->io_us[q->nr++] = io_u;
+               return;
+       }
+
+       assert(0);
 }
 
-static inline int io_u_qempty(struct io_u_queue *q)
+static inline int io_u_qempty(const struct io_u_queue *q)
 {
        return !q->nr;
 }