libtf: stackable timeouts

instead of having per-function argument, use a push/pop mechanism:
- multiple timers inside fiber use only one heap entry
- easy to chain multiple possibly blocking operations inside one
  timeout block

1 files changed, 6 insertions, 0 deletions

diff --git a/include/libtf/heap.h b/include/libtf/heap.h
index 24f4767..a68e01d 100644
--- a/include/libtf/heap.h
+++ b/include/libtf/heap.h
@@ -61,6 +61,12 @@ int tf_heap_empty(struct tf_heap_head *head)
 }
 
 static inline
+int tf_heap_node_active(struct tf_heap_node *node)
+{
+	return node->index != 0;
+}
+
+static inline
 int tf_heap_prealloc(struct tf_heap_head *head, uint32_t size)
 {
 	if (unlikely(head->num_items + TF_HEAP_ITEM0 >= head->allocated))