schedulerservice/1.0/ISchedulingPolicyService.hal

/*
 * Copyright (C) 2017 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.frameworks.schedulerservice@1.0;

interface ISchedulingPolicyService {
    enum Priority : int32_t {
        MIN = 1,
        MAX = 99,
    };

    /**
     * Request real-time priority for a specific thread in a process.
     *
     * @param pid Process ID.
     * @param tid Thread ID.
     * @param priority Value within [Priority:MIN, Priority:MAX]
     *
     * @return success whether or not priority was successfully set
     */
    requestPriority(int32_t pid, int32_t tid, int32_t priority)
        generates (bool success);

    /**
     * Must return 0 if no priority is allowed.
     *
     * @return priority Max priority that can be set with
     *                  requestPriority.
     */
    getMaxAllowedPriority() generates (int32_t priority);
};