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GDExtension: Add compatibility system for virtual methods

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This commit is contained in:
David Snopek
2024-12-20 17:10:46 -06:00
parent bdf625bd54
commit 39f16e70f8
9 changed files with 202 additions and 53 deletions
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6
core/extension/gdextension_interface.h
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@ -273,7 +273,9 @@ typedef GDExtensionObjectPtr (*GDExtensionClassCreateInstance2)(void *p_class_us
typedef void (*GDExtensionClassFreeInstance)(void *p_class_userdata, GDExtensionClassInstancePtr p_instance);
typedef GDExtensionClassInstancePtr (*GDExtensionClassRecreateInstance)(void *p_class_userdata, GDExtensionObjectPtr p_object);
typedef GDExtensionClassCallVirtual (*GDExtensionClassGetVirtual)(void *p_class_userdata, GDExtensionConstStringNamePtr p_name);
typedef GDExtensionClassCallVirtual (*GDExtensionClassGetVirtual2)(void *p_class_userdata, GDExtensionConstStringNamePtr p_name, uint32_t p_hash);
typedef void *(*GDExtensionClassGetVirtualCallData)(void *p_class_userdata, GDExtensionConstStringNamePtr p_name);
typedef void *(*GDExtensionClassGetVirtualCallData2)(void *p_class_userdata, GDExtensionConstStringNamePtr p_name, uint32_t p_hash);
typedef void (*GDExtensionClassCallVirtualWithData)(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, void *p_virtual_call_userdata, const GDExtensionConstTypePtr *p_args, GDExtensionTypePtr r_ret);
typedef struct {
@ -384,14 +386,14 @@ typedef struct {
GDExtensionClassFreeInstance free_instance_func; // Destructor; mandatory.
GDExtensionClassRecreateInstance recreate_instance_func;
// Queries a virtual function by name and returns a callback to invoke the requested virtual function.
GDExtensionClassGetVirtual get_virtual_func;
GDExtensionClassGetVirtual2 get_virtual_func;
// Paired with `call_virtual_with_data_func`, this is an alternative to `get_virtual_func` for extensions that
// need or benefit from extra data when calling virtual functions.
// Returns user data that will be passed to `call_virtual_with_data_func`.
// Returning `NULL` from this function signals to Godot that the virtual function is not overridden.
// Data returned from this function should be managed by the extension and must be valid until the extension is deinitialized.
// You should supply either `get_virtual_func`, or `get_virtual_call_data_func` with `call_virtual_with_data_func`.
GDExtensionClassGetVirtualCallData get_virtual_call_data_func;
GDExtensionClassGetVirtualCallData2 get_virtual_call_data_func;
// Used to call virtual functions when `get_virtual_call_data_func` is not null.
GDExtensionClassCallVirtualWithData call_virtual_with_data_func;
void *class_userdata; // Per-class user data, later accessible in instance bindings.