fork from https://github.com/mozilla/pdf.js.git

src/core/cleanup_helper.js

@@ -0,0 +1,31 @@
+/* Copyright 2022 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { clearPatternCaches } from "./pattern.js";
+import { clearPrimitiveCaches } from "./primitives.js";
+import { clearUnicodeCaches } from "./unicode.js";
+import { WasmImage } from "./wasm_image.js";
+
+function clearGlobalCaches() {
+  clearPatternCaches();
+  clearPrimitiveCaches();
+  clearUnicodeCaches();
+
+  // Remove the global `WasmImage` instances,
+  // since they may hold references to the WebAssembly modules.
+  WasmImage.cleanup();
+}
+
+export { clearGlobalCaches };