/*
 * Copyright (C) 2016 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.contexthub@1.0;

interface IContexthubCallback {
    /**
     * This callback is passed by the Contexthub service to the HAL
     * implementation to allow the HAL to send asynchronous messages back
     * to the service and registered clients of the ContextHub service.
     *
     * @param msg message being sent from the contexthub
     *
     */
     handleClientMsg(ContextHubMsg msg);

    /**
     * This callback is passed by the Contexthub service to the HAL
     * implementation to allow the HAL to send the response for a
     * transaction.
     *
     * @param txnId transaction id whose result is being sent
     *              passed in by the service at start of transacation.
     * @param result result of transaction.
     *
     */
     handleTxnResult(uint32_t txnId, TransactionResult result);

    /**
     * This callback is passed by the Contexthub service to the HAL
     * implementation to allow the HAL to send an asynchronous event
     * to the ContextHub service.
     *
     * @param evt event being sent from the contexthub
     *
     */
     handleHubEvent(AsyncEventType evt);

    /**
     * This callback is passed by the Contexthub service to the HAL
     * implementation to allow the HAL to send a notification to the service
     * that a nanp-app has aborted.
     * This method must be called when a nanoapp invokes chreAbort(...)).
     *
     * @param appId app identifier
     * @param abortCode code passed by the nanoApp.
     *
     * Also see chreAbort(...)
     *
     */
     handleAppAbort(uint64_t appId, uint32_t abortCode);

     /**
      * This callback is passed by the Contexthub service to the HAL
      * implementation to allow the HAL to send information about the
      * currently loaded and active nanoapps on the hub.
      *
      * @param appInfo vector of HubAppinfo structure for each nanoApp on the
      *                hub that can be enabled, disabled and unloaded by the
      *                service. Any nanoApps that cannot be controlled by the
      *                service must not be reported. All nanoApps that can be
      *                controlled by the service must be reported.
      */
      handleAppsInfo(vec<HubAppInfo> appInfo);
};