- Move register backend logic to its own file

Differential Revision: D77910822

Pull Request resolved: #13014

Author: metascroy

backends/apple/coreml/runtime/delegate/executorch_operations.h

@@ -0,0 +1,5 @@
+#pragma once
+
+namespace executorch::core_ml_backend_delegate {
+void register_backend_coreml();
+} // namespace executorch::core_ml_backend_delegate

backends/apple/coreml/runtime/delegate/executorch_operations.mm

@@ -0,0 +1,29 @@
+#pragma once
+
+#include "executorch_operations.h"
+#import <coreml_backend/delegate.h>
+#import "ETCoreMLStrings.h"
+#import "backend_delegate.h"
+
+#import <executorch/runtime/core/evalue.h>
+#import <executorch/runtime/platform/log.h>
+#import <executorch/runtime/backend/interface.h>
+
+#include <array>
+#import <memory>
+
+namespace executorch::core_ml_backend_delegate {
+  using executorch::runtime::get_backend_class;
+
+static std::unique_ptr<executorch::backends::coreml::CoreMLBackendDelegate> backendInterfaceLazy_;
+
+void register_backend_coreml() {
+    auto backendInterface = executorch::runtime::get_backend_class(ETCoreMLStrings.delegateIdentifier.UTF8String);
+    if (backendInterface == nullptr) {
+      backendInterfaceLazy_ = std::make_unique<executorch::backends::coreml::CoreMLBackendDelegate>();
+      executorch::runtime::Backend backend{ETCoreMLStrings.delegateIdentifier.UTF8String, backendInterfaceLazy_.get()};
+      std::ignore = register_backend(backend);
+    }
+  }
+
+} // namespace executorch::core_ml_backend_delegate