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+/*
+ * Copyright (c) 2020 Arm Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_IOPERATOR_H
+#define ARM_COMPUTE_IOPERATOR_H
+
+#include "arm_compute/core/experimental/Types.h"
+#include "arm_compute/runtime/IRuntimeContext.h"
+#include "arm_compute/runtime/Types.h"
+
+namespace arm_compute
+{
+class ITensorPack;
+namespace experimental
+{
+/** Base class for all async functions */
+class IOperator
+{
+public:
+    /** Destructor */
+    virtual ~IOperator() = default;
+    /** Run the kernels contained in the function
+     *
+     * @param[in] tensors Vector that contains the tensors to operate on.
+     *
+     */
+    virtual void run(ITensorPack &tensors) = 0;
+    /** Prepare the function for executing
+     *
+     * Any one off pre-processing step required by the function is handled here
+     *
+     * @param[in] constants Vector that contains the constants tensors.
+     *
+     * @note Prepare stage might not need all the function's buffers' backing memory to be available in order to execute
+     */
+    virtual void prepare(ITensorPack &constants) = 0;
+
+    /** Return the memory requirements required by the workspace
+     */
+    virtual MemoryRequirements workspace() const = 0;
+};
+} // namespace experimental
+} // namespace arm_compute
+#endif /*ARM_COMPUTE_IOPERATOR_H */