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Unique HalManagedMetalLayerDelegate class (#2209)

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* Unique HalManagedMetalLayerDelegate class

* Remove once-cell dependency
This commit is contained in:
Xiaopeng Li
2021-11-26 00:23:26 +08:00
committed by GitHub
parent dde73ed236
commit f4d51451fa
1 changed files with 4 additions and 3 deletions
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7
wgpu-hal/src/metal/surface.rs
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@@ -31,7 +31,6 @@ extern "C" fn layer_should_inherit_contents_scale_from_window(
YES
}
const CAML_DELEGATE_CLASS: &str = "HalManagedMetalLayerDelegate";
static CAML_DELEGATE_REGISTER: Once = Once::new();
#[derive(Debug)]
@@ -39,9 +38,11 @@ pub struct HalManagedMetalLayerDelegate(&'static Class);
impl HalManagedMetalLayerDelegate {
pub fn new() -> Self {
let class_name = format!("HalManagedMetalLayerDelegate@{:p}", &CAML_DELEGATE_REGISTER);
CAML_DELEGATE_REGISTER.call_once(|| {
type Fun = extern "C" fn(&Class, Sel, *mut Object, CGFloat, *mut Object) -> BOOL;
let mut decl = ClassDecl::new(CAML_DELEGATE_CLASS, class!(NSObject)).unwrap();
let mut decl = ClassDecl::new(&class_name, class!(NSObject)).unwrap();
#[allow(trivial_casts)] // false positive
unsafe {
decl.add_class_method(
@@ -51,7 +52,7 @@ impl HalManagedMetalLayerDelegate {
}
decl.register();
});
Self(Class::get(CAML_DELEGATE_CLASS).unwrap())
Self(Class::get(&class_name).unwrap())
}
}