gnss/2.1/IGnss.hal

/*
 * 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.gnss@2.1;

import @2.0::IGnss;

import IGnssCallback;
import IGnssMeasurement;

/**
 * Represents the standard GNSS (Global Navigation Satellite System) interface.
 */
interface IGnss extends @2.0::IGnss {
    /**
     * Opens the interface and provides the callback routines to the implementation of this
     * interface.
     *
     * The framework calls this method to instruct the GPS engine to prepare for serving requests
     * from the framework. The GNSS HAL implementation must respond to all GNSS requests from the
     * framework upon successful return from this method until cleanup() method is called to
     * close this interface.
     *
     * @param callback Callback interface for IGnss.
     *
     * @return success Returns true on success.
     */
    setCallback_2_1(IGnssCallback callback) generates (bool success);

    /**
     * This method returns the IGnssMeasurement interface.
     *
     * At least one of getExtensionGnssMeasurement(), getExtensionGnssMeasurement_1_1(),
     * getExtensionGnssMeasurement_2_0(), and getExtensionGnssMeasurement_2_1() methods must return
     * a non-null handle, and the other methods must return nullptr.
     *
     * @return gnssMeasurementIface Handle to the IGnssMeasurement interface.
     */
    getExtensionGnssMeasurement_2_1() generates (IGnssMeasurement gnssMeasurementIface);
};