[src/trunk]: src/sys Add PCQ_MAXLEN constant.

[rmind <rmind%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/94b4a2aacee2
branches:  trunk
changeset: 329785:94b4a2aacee2
user:      rmind <rmind%NetBSD.org@localhost>
date:      Mon Jun 09 12:44:06 2014 +0000

description:
Add PCQ_MAXLEN constant.

diffstat:

 sys/kern/subr_pcq.c |  7 ++++---
 sys/sys/pcq.h       |  6 +++++-
 2 files changed, 9 insertions(+), 4 deletions(-)

diffs (61 lines):

diff -r 1e9ee276b127 -r 94b4a2aacee2 sys/kern/subr_pcq.c
--- a/sys/kern/subr_pcq.c       Mon Jun 09 11:08:05 2014 +0000
+++ b/sys/kern/subr_pcq.c       Mon Jun 09 12:44:06 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: subr_pcq.c,v 1.7 2014/02/06 03:47:16 riastradh Exp $   */
+/*     $NetBSD: subr_pcq.c,v 1.8 2014/06/09 12:44:06 rmind Exp $       */
 
 /*-
  * Copyright (c) 2009 The NetBSD Foundation, Inc.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_pcq.c,v 1.7 2014/02/06 03:47:16 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_pcq.c,v 1.8 2014/06/09 12:44:06 rmind Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -60,6 +60,7 @@
  * Consumer (c) - in the higher 16 bits.
  *
  * We have a limitation of 16 bits i.e. 0xffff items in the queue.
+ * The PCQ_MAXLEN constant is set accordingly.
  */
 
 static inline void
@@ -197,7 +198,7 @@
 {
        pcq_t *pcq;
 
-       KASSERT(nitems > 0 || nitems <= 0xffff);
+       KASSERT(nitems > 0 || nitems <= PCQ_MAXLEN);
 
        pcq = kmem_zalloc(offsetof(pcq_t, pcq_items[nitems]), kmflags);
        if (pcq == NULL) {
diff -r 1e9ee276b127 -r 94b4a2aacee2 sys/sys/pcq.h
--- a/sys/sys/pcq.h     Mon Jun 09 11:08:05 2014 +0000
+++ b/sys/sys/pcq.h     Mon Jun 09 12:44:06 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pcq.h,v 1.1 2008/11/11 20:17:27 matt Exp $     */
+/*     $NetBSD: pcq.h,v 1.2 2014/06/09 12:44:06 rmind Exp $    */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -37,12 +37,16 @@
 typedef struct pcq pcq_t;
 
 #ifdef _KERNEL
+
+#define        PCQ_MAXLEN      (0xffffU)
+
 bool   pcq_put(pcq_t *, void *);
 void * pcq_peek(pcq_t *);
 void * pcq_get(pcq_t *);
 size_t pcq_maxitems(pcq_t *);
 pcq_t *        pcq_create(size_t, km_flag_t);
 void   pcq_destroy(pcq_t *);
+
 #endif /* _KERNEL */
 
 #endif /* _SYS_PCQ_H_ */