Function MTLCopyAllDevicesWithObserver 

pub unsafe extern "C" fn MTLCopyAllDevicesWithObserver(
    observer: *mut DeviceObserver,
    handler: *const c_void,
) -> *mut c_void

Copy all devices with a notification observer.

Returns an NSArray containing all available Metal devices and sets up a notification observer for device hot-plug events.

C++ Equivalent

NS::Array* MTL::CopyAllDevicesWithObserver(
    NS::Object** pOutObserver,
    MTL::DeviceNotificationHandlerBlock handler
);

Arguments

• observer - Output parameter that receives the observer reference
• handler - Block called when device changes occur

Returns

A pointer to an NSArray of Metal devices. The caller owns the array.