/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * 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.
 */

package android.hardware.neuralnetworks@1.2;

import @1.0::ErrorStatus;

/**
 * Callback object used by a service to retreive memory objects based on unique
 * identifiers ("slots").
 */
interface IBurstCallback {
    /**
     * Get the memory regions that correspond to slot ids. The slot ids are
     * unique to the burst object.
     *
     * @param slots Values uniquely identifying memory regions within a Burst.
     * @return status Indicates whether the memories were successfully returned;
     *                must be:
     *                - NONE if the memory region was successfully retrieved
     *                - GENERAL_FAILURE if there is an unspecified error
     *                - INVALID_ARGUMENT if a slot number is invalid
     * @return buffers Memory buffers corresponding to the slot numbers. If an
     *                 error occurs, an empty vector must be returned for
     *                 buffers, otherwise slots.size() == buffers.size().
     */
    getMemories(vec<int32_t> slots) generates (ErrorStatus status, vec<memory> buffers);
};