Allocator: simplify using guarded allocator in C++ code

Using the `MEM_*` API from C++ code was a bit annoying:
* When converting C to C++ code, one often has to add a type cast on
  returned `void *`. That leads to having the same type name three times
  in the same line. This patch reduces the amount to two and removes the
  `sizeof(...)` from the line.
* The existing alternative of using `OBJECT_GUARDED_NEW` looks a out
  of place compared to other allocation methods. Sometimes
  `MEM_CXX_CLASS_ALLOC_FUNCS` can be used when structs are defined
  in C++ code. It doesn't look great but it's definitely better. The downside
  is that it makes the name of the allocation less useful. That's because
  the same name is used for all allocations of a type, independend of
  where it is allocated.

This patch introduces three new functions: `MEM_new`, `MEM_cnew` and
`MEM_delete`. These cover the majority of use cases (array allocation is
not covered).

The `OBJECT_GUARDED_*` macros are removed because they are not
needed anymore.

Differential Revision: https://developer.blender.org/D13502

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/editors/space_file/asset_catalog_tree_view.cc b/source/blender/editors/space_file/asset_catalog_tree_view.cc
index 86c4b78dea4..f6c449a0584 100644
--- a/source/blender/editors/space_file/asset_catalog_tree_view.cc
+++ b/source/blender/editors/space_file/asset_catalog_tree_view.cc
@@ -679,7 +679,7 @@ using namespace blender::ed::asset_browser;
 
 FileAssetCatalogFilterSettingsHandle *file_create_asset_catalog_filter_settings()
 {
-  AssetCatalogFilterSettings *filter_settings = OBJECT_GUARDED_NEW(AssetCatalogFilterSettings);
+  AssetCatalogFilterSettings *filter_settings = MEM_new<AssetCatalogFilterSettings>(__func__);
   return reinterpret_cast<FileAssetCatalogFilterSettingsHandle *>(filter_settings);
 }
 
@@ -688,7 +688,8 @@ void file_delete_asset_catalog_filter_settings(
 {
   AssetCatalogFilterSettings **filter_settings = reinterpret_cast<AssetCatalogFilterSettings **>(
       filter_settings_handle);
-  OBJECT_GUARDED_SAFE_DELETE(*filter_settings, AssetCatalogFilterSettings);
+  MEM_delete(*filter_settings);
+  *filter_settings = nullptr;
 }
 
 bool file_set_asset_catalog_filter_settings(