Add priority inheritance implementation for Semaphores.

[bertos.git] / bertos / struct / list.h

diff --git a/bertos/struct/list.h b/bertos/struct/list.h
index 91fe63fb50ad194ed52d111c0999b4b486fc55df..96b71b4fdb05fab95f136eb96c66b0199af767dd 100644 (file)
--- a/bertos/struct/list.h
+++ b/bertos/struct/list.h
@@ -216,6 +216,21 @@ typedef struct _PriNode
                (n) = (TYPEOF_OR_VOIDPTR(n))(((Node *)(n))->pred) \
        )
 
+/**
+ * Iterate on the list safely against node removal.
+ *
+ * This macro generates a "for" statement using the following parameters:
+ * \param n   Node pointer to be used in each iteration.
+ * \param p   Temporal storage for the iterator.
+ * \param l   Pointer to list.
+ */
+#define FOREACH_NODE_SAFE(n, p, l) \
+       for( \
+               (n) = (TYPEOF_OR_VOIDPTR(n))LIST_HEAD(l), (p) = ((Node *)(n))->succ; \
+               ((Node *)(n))->succ; \
+               (n) = (p), (p) = (TYPEOF_OR_VOIDPTR(n))(((Node *)(n))->succ) \
+       )
+
 /** Initialize a list. */
 #define LIST_INIT(l) \
        do { \