actions: add reference to a_return

The action return can return either a constant value or a reference to a
value.

Signed-off-by: Alice Frosi <afrosi@redhat.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/gluten.h b/gluten.h
index c6cac3c..ae5e212 100644
--- a/gluten.h
+++ b/gluten.h
@@ -52,6 +52,11 @@ enum action_type {
 	A_RETURN,
 };
 
+enum value_type {
+	IMMEDIATE,
+	REFERENCE,
+};
+
 struct act_call {
 	long nr;
 	void *args[6];
@@ -67,7 +72,11 @@ struct act_continue {
 };
 
 struct act_return {
-	int64_t value;
+	enum value_type type;
+	union {
+		int64_t value;
+		int64_t *value_p;
+	};
 };
 
 struct act_inject {