* synchronization.
*/
+#define CDS_WFS_WOULDBLOCK ((void *) -1UL)
+
/*
* struct cds_wfs_node is returned by __cds_wfs_pop, and also used as
* iterator on stack. It is not safe to dereference the node next
*/
extern struct cds_wfs_node *cds_wfs_next_blocking(struct cds_wfs_node *node);
+/*
+ * cds_wfs_next_nonblocking: get next node of a popped stack.
+ *
+ * Same as cds_wfs_next_blocking, but returns CDS_WFS_WOULDBLOCK if it
+ * needs to block.
+ */
+extern struct cds_wfs_node *cds_wfs_next_nonblocking(struct cds_wfs_node *node);
+
/*
* cds_wfs_pop_lock: lock stack pop-protection mutex.
*/
*/
extern struct cds_wfs_node *__cds_wfs_pop_blocking(struct cds_wfs_stack *s);
+/*
+ * __cds_wfs_pop_nonblocking: pop a node from the stack.
+ *
+ * Same as __cds_wfs_pop_blocking, but returns CDS_WFS_WOULDBLOCK if
+ * it needs to block.
+ */
+extern struct cds_wfs_node *__cds_wfs_pop_nonblocking(struct cds_wfs_stack *s);
+
/*
* __cds_wfs_pop_all: pop all nodes from a stack.
*