Move parse frame array to the Map object

This makes the frame stack per-parser, and per-thread.  Fixes #3250

1 files changed, 12 insertions, 0 deletions

diff --git a/ruby/ext/google/protobuf_c/map.c b/ruby/ext/google/protobuf_c/map.c
index 4be54c39..0787f6d5 100644
--- a/ruby/ext/google/protobuf_c/map.c
+++ b/ruby/ext/google/protobuf_c/map.c
@@ -146,6 +146,7 @@ void Map_mark(void* _self) {
   Map* self = _self;
 
   rb_gc_mark(self->value_type_class);
+  rb_gc_mark(self->parse_frames);
 
   if (self->value_type == UPB_TYPE_STRING ||
       self->value_type == UPB_TYPE_BYTES ||
@@ -174,6 +175,16 @@ VALUE Map_alloc(VALUE klass) {
   return TypedData_Wrap_Struct(klass, &Map_type, self);
 }
 
+VALUE Map_push_frame(VALUE map, VALUE val) {
+  Map* self = ruby_to_Map(map);
+  return rb_ary_push(self->parse_frames, val);
+}
+
+VALUE Map_pop_frame(VALUE map) {
+  Map* self = ruby_to_Map(map);
+  return rb_ary_pop(self->parse_frames);
+}
+
 static bool needs_typeclass(upb_fieldtype_t type) {
   switch (type) {
     case UPB_TYPE_MESSAGE:
@@ -227,6 +238,7 @@ VALUE Map_init(int argc, VALUE* argv, VALUE _self) {
 
   self->key_type = ruby_to_fieldtype(argv[0]);
   self->value_type = ruby_to_fieldtype(argv[1]);
+  self->parse_frames = rb_ary_new();
 
   // Check that the key type is an allowed type.
   switch (self->key_type) {