Module: xenomai-2.4
Branch: master
Commit: 397dc40d3d6fe46c91472b21946b73aa2ea0c5fe
URL:
http://git.xenomai.org/?p=xenomai-2.4.git;a=commit;h=397dc40d3d6fe46c91472b21946b73aa2ea0c5fe
Author: Philippe Gerum <r...@xenomai.org>
Date: Wed Jul 15 12:42:58 2009 +0200
nucleus: fix potential init race of the main pod
---
ksrc/nucleus/pod.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/ksrc/nucleus/pod.c b/ksrc/nucleus/pod.c
index 5eef706..9348ce1 100644
--- a/ksrc/nucleus/pod.c
+++ b/ksrc/nucleus/pod.c
@@ -256,15 +256,18 @@ int xnpod_init(void)
xnlock_get_irqsave(&nklock, s);
- if (xnpod_active_p()) {
- /* Another skin has initialized the global pod
- * already; just increment the reference count. */
+ pod = &nkpod_struct;
+ if (pod->refcnt > 0) {
+ /*
+ * Another skin has already initialized, or is
+ * currently initializing the global pod already; just
+ * increment the reference count and bail out.
+ */
++nkpod->refcnt;
xnlock_put_irqrestore(&nklock, s);
return 0;
}
- pod = &nkpod_struct;
pod->status = 0;
pod->refcnt = 1;
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