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diff --git a/src/utils/executor.h b/src/utils/executor.h
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+/*
+ * Copyright 2019 The libgav1 Authors
+ *
+ * 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.
+ */
+
+#ifndef LIBGAV1_SRC_UTILS_EXECUTOR_H_
+#define LIBGAV1_SRC_UTILS_EXECUTOR_H_
+
+#include <functional>
+
+namespace libgav1 {
+
+class Executor {
+ public:
+  virtual ~Executor();
+
+  // Schedules the specified "callback" for execution in this executor.
+  // Depending on the subclass implementation, this may block in some
+  // situations.
+  virtual void Schedule(std::function<void()> callback) = 0;
+};
+
+}  // namespace libgav1
+
+#endif  // LIBGAV1_SRC_UTILS_EXECUTOR_H_