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/*
* Copyright (C) 2021 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.
*/
#ifndef ANDROID_PRIVATE_NATIVE_PERFORMANCE_HINT_PRIVATE_H
#define ANDROID_PRIVATE_NATIVE_PERFORMANCE_HINT_PRIVATE_H
#include <stdint.h>
__BEGIN_DECLS
/**
* For testing only.
*/
void APerformanceHint_setIHintManagerForTesting(void* iManager);
/**
* Hints for the session used to signal upcoming changes in the mode or workload.
*/
enum SessionHint: int32_t {
/**
* This hint indicates a sudden increase in CPU workload intensity. It means
* that this hint session needs extra CPU resources immediately to meet the
* target duration for the current work cycle.
*/
CPU_LOAD_UP = 0,
/**
* This hint indicates a decrease in CPU workload intensity. It means that
* this hint session can reduce CPU resources and still meet the target duration.
*/
CPU_LOAD_DOWN = 1,
/*
* This hint indicates an upcoming CPU workload that is completely changed and
* unknown. It means that the hint session should reset CPU resources to a known
* baseline to prepare for an arbitrary load, and must wake up if inactive.
*/
CPU_LOAD_RESET = 2,
/*
* This hint indicates that the most recent CPU workload is resuming after a
* period of inactivity. It means that the hint session should allocate similar
* CPU resources to what was used previously, and must wake up if inactive.
*/
CPU_LOAD_RESUME = 3,
/**
* This hint indicates an increase in GPU workload intensity. It means that
* this hint session needs extra GPU resources to meet the target duration.
* This hint must be sent before reporting the actual duration to the session.
*/
GPU_LOAD_UP = 5,
/**
* This hint indicates a decrease in GPU workload intensity. It means that
* this hint session can reduce GPU resources and still meet the target duration.
*/
GPU_LOAD_DOWN = 6,
/*
* This hint indicates an upcoming GPU workload that is completely changed and
* unknown. It means that the hint session should reset GPU resources to a known
* baseline to prepare for an arbitrary load, and must wake up if inactive.
*/
GPU_LOAD_RESET = 7,
};
/**
* Sends performance hints to inform the hint session of changes in the workload.
*
* @param session The performance hint session instance to update.
* @param hint The hint to send to the session.
* @return 0 on success
* EPIPE if communication with the system service has failed.
*/
int APerformanceHint_sendHint(void* session, SessionHint hint);
/**
* Return the list of thread ids, this API should only be used for testing only.
*/
int APerformanceHint_getThreadIds(void* aPerformanceHintSession,
int32_t* const threadIds, size_t* const size);
__END_DECLS
#endif // ANDROID_PRIVATE_NATIVE_PERFORMANCE_HINT_PRIVATE_H
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