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-rw-r--r--test/src/example.cpp34
1 files changed, 29 insertions, 5 deletions
diff --git a/test/src/example.cpp b/test/src/example.cpp
index 3e10f32..ad2c844 100644
--- a/test/src/example.cpp
+++ b/test/src/example.cpp
@@ -13,12 +13,27 @@
using namespace godot;
+int ExampleRef::instance_count = 0;
+int ExampleRef::last_id = 0;
+
+int ExampleRef::get_id() {
+ return id;
+}
+
+void ExampleRef::_bind_methods() {
+ ClassDB::bind_method(D_METHOD("get_id"), &ExampleRef::get_id);
+}
+
ExampleRef::ExampleRef() {
- UtilityFunctions::print("ExampleRef created.");
+ id = ++last_id;
+ instance_count++;
+
+ UtilityFunctions::print("ExampleRef ", itos(id), " created, current instance count: ", itos(instance_count));
}
ExampleRef::~ExampleRef() {
- UtilityFunctions::print("ExampleRef destroyed.");
+ instance_count--;
+ UtilityFunctions::print("ExampleRef ", itos(id), " destroyed, current instance count: ", itos(instance_count));
}
int Example::test_static(int p_a, int p_b) {
@@ -99,8 +114,9 @@ void Example::_bind_methods() {
ClassDB::bind_method(D_METHOD("simple_const_func"), &Example::simple_const_func);
ClassDB::bind_method(D_METHOD("return_something"), &Example::return_something);
ClassDB::bind_method(D_METHOD("return_something_const"), &Example::return_something_const);
+ ClassDB::bind_method(D_METHOD("return_empty_ref"), &Example::return_empty_ref);
ClassDB::bind_method(D_METHOD("return_extended_ref"), &Example::return_extended_ref);
- ClassDB::bind_method(D_METHOD("extended_ref_checks"), &Example::extended_ref_checks);
+ ClassDB::bind_method(D_METHOD("extended_ref_checks", "ref"), &Example::extended_ref_checks);
ClassDB::bind_method(D_METHOD("test_array"), &Example::test_array);
ClassDB::bind_method(D_METHOD("test_tarray_arg", "array"), &Example::test_tarray_arg);
@@ -184,15 +200,23 @@ Viewport *Example::return_something_const() const {
return nullptr;
}
+Ref<ExampleRef> Example::return_empty_ref() const {
+ Ref<ExampleRef> ref;
+ return ref;
+}
+
ExampleRef *Example::return_extended_ref() const {
+ // You can instance and return a refcounted object like this, but keep in mind that refcounting starts with the returned object
+ // and it will be destroyed when all references are destroyed. If you store this pointer you run the risk of having a pointer
+ // to a destroyed object.
return memnew(ExampleRef());
}
Ref<ExampleRef> Example::extended_ref_checks(Ref<ExampleRef> p_ref) const {
+ // This is therefor the prefered way of instancing and returning a refcounted object:
Ref<ExampleRef> ref;
ref.instantiate();
- // TODO the returned value gets dereferenced too early and return a null object otherwise.
- ref->reference();
+
UtilityFunctions::print(" Example ref checks called with value: ", p_ref->get_instance_id(), ", returning value: ", ref->get_instance_id());
return ref;
}