Change uncaptured error handler pointer type from Box to Arc.

This will be necessary for the next change.

CHANGELOG.md

@@ -72,7 +72,7 @@ By @Vecvec in [#7913](https://github.com/gfx-rs/wgpu/pull/7913).
   - Copies of depth/stencil formats must be 4B aligned.
 - The offset for `set_vertex_buffer` and `set_index_buffer` must be 4B aligned. By @andyleiserson in [#7929](https://github.com/gfx-rs/wgpu/pull/7929).
 - The offset and size of bindings are validated as fitting within the underlying buffer in more cases. By @andyleiserson in [#7911](https://github.com/gfx-rs/wgpu/pull/7911).
-- The function you pass to `Device::on_uncaptured_error()` must now implement `Sync` in addition to `Send`.
+- The function you pass to `Device::on_uncaptured_error()` must now implement `Sync` in addition to `Send`, and be wrapped in `Arc` instead of `Box`.
   By @kpreid in [#8011](https://github.com/gfx-rs/wgpu/pull/8011).
 
 #### Naga

examples/standalone/custom_backend/src/custom.rs

@@ -240,7 +240,7 @@ impl DeviceInterface for CustomDevice {
         unimplemented!()
     }
 
-    fn on_uncaptured_error(&self, _handler: Box<dyn wgpu::UncapturedErrorHandler>) {
+    fn on_uncaptured_error(&self, _handler: Arc<dyn wgpu::UncapturedErrorHandler>) {
         unimplemented!()
     }
 

wgpu/src/api/device.rs

@@ -407,8 +407,8 @@ impl Device {
         QuerySet { inner: query_set }
     }
 
-    /// Set a callback for errors that are not handled in error scopes.
+    /// Set a callback which will be called for all errors that are not handled in error scopes.
-    pub fn on_uncaptured_error(&self, handler: Box<dyn UncapturedErrorHandler>) {
+    pub fn on_uncaptured_error(&self, handler: Arc<dyn UncapturedErrorHandler>) {
         self.inner.on_uncaptured_error(handler)
     }
 

wgpu/src/backend/webgpu.rs

@@ -10,6 +10,7 @@ use alloc::{
     format,
     rc::Rc,
     string::{String, ToString as _},
+    sync::Arc,
     vec,
     vec::Vec,
 };
@@ -2409,7 +2410,7 @@ impl dispatch::DeviceInterface for WebDevice {
         closure.forget();
     }
 
-    fn on_uncaptured_error(&self, handler: Box<dyn crate::UncapturedErrorHandler>) {
+    fn on_uncaptured_error(&self, handler: Arc<dyn crate::UncapturedErrorHandler>) {
         let f = Closure::wrap(Box::new(move |event: webgpu_sys::GpuUncapturedErrorEvent| {
             let error = crate::Error::from_js(event.error().value_of());
             handler(error);

wgpu/src/backend/wgpu_core.rs

@@ -617,7 +617,7 @@ struct ErrorScope {
 
 struct ErrorSinkRaw {
     scopes: Vec<ErrorScope>,
-    uncaptured_handler: Option<Box<dyn crate::UncapturedErrorHandler>>,
+    uncaptured_handler: Option<Arc<dyn crate::UncapturedErrorHandler>>,
 }
 
 impl ErrorSinkRaw {
@@ -1757,7 +1757,7 @@ impl dispatch::DeviceInterface for CoreDevice {
             .device_set_device_lost_closure(self.id, device_lost_callback);
     }
 
-    fn on_uncaptured_error(&self, handler: Box<dyn crate::UncapturedErrorHandler>) {
+    fn on_uncaptured_error(&self, handler: Arc<dyn crate::UncapturedErrorHandler>) {
         let mut error_sink = self.error_sink.lock();
         error_sink.uncaptured_handler = Some(handler);
     }

wgpu/src/dispatch.rs

@@ -185,7 +185,7 @@ pub trait DeviceInterface: CommonTraits {
 
     fn set_device_lost_callback(&self, device_lost_callback: BoxDeviceLostCallback);
 
-    fn on_uncaptured_error(&self, handler: Box<dyn crate::UncapturedErrorHandler>);
+    fn on_uncaptured_error(&self, handler: Arc<dyn crate::UncapturedErrorHandler>);
     fn push_error_scope(&self, filter: crate::ErrorFilter);
     fn pop_error_scope(&self) -> Pin<Box<dyn PopErrorScopeFuture>>;