From 8d98992b9fa3059554c6cd5ff45ee3b47805fa1c Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Wed, 15 Feb 2017 19:19:02 +0100
Subject: erts: Add ERTS_RBT_YIELD_STAT_INIT to erl_rbtree

for dynamic initialization of yield state.
---
 erts/emulator/beam/erl_rbtree.h | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/erts/emulator/beam/erl_rbtree.h b/erts/emulator/beam/erl_rbtree.h
index 5fefaea978..a10b1b1081 100644
--- a/erts/emulator/beam/erl_rbtree.h
+++ b/erts/emulator/beam/erl_rbtree.h
@@ -105,7 +105,10 @@
  * <ERTS_RBT_PREFIX>_rbt_yield_state_t.
  *
  * The yield state should be statically initialized by
- * ERTS_RBT_YIELD_STAT_INITER.
+ * ERTS_RBT_YIELD_STAT_INITER
+ *
+ * or dynamically initialized with
+ * ERTS_RBT_YIELD_STAT_INIT(<ERTS_RBT_PREFIX>_rbt_yield_state_t *ystate)
  *
  *
  * The following API functions are implemented if corresponding
@@ -422,6 +425,13 @@
 #ifndef ERTS_RBT_YIELD_STAT_INITER
 #  define ERTS_RBT_YIELD_STAT_INITER {NULL, 0}
 #endif
+#ifndef ERTS_RBT_YIELD_STAT_INIT
+#  define ERTS_RBT_YIELD_STAT_INIT(YS) \
+    do {                               \
+        (YS)->x = NULL;                \
+        (YS)->up = 0;                  \
+    } while (0)
+#endif
 
 #define ERTS_RBT_CONCAT_MACRO_VALUES___(X, Y) \
     X ## Y
-- 
cgit v1.2.3