77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
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/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_PRIVATE_NATIVE_PERFORMANCE_HINT_PRIVATE_H
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#define ANDROID_PRIVATE_NATIVE_PERFORMANCE_HINT_PRIVATE_H
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#include <stdint.h>
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__BEGIN_DECLS
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/**
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* For testing only.
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*/
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void APerformanceHint_setIHintManagerForTesting(void* iManager);
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/**
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* Hints for the session used to signal upcoming changes in the mode or workload.
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*/
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enum SessionHint: int32_t {
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/**
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* This hint indicates a sudden increase in CPU workload intensity. It means
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* that this hint session needs extra CPU resources immediately to meet the
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* target duration for the current work cycle.
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*/
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CPU_LOAD_UP = 0,
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/**
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* This hint indicates a decrease in CPU workload intensity. It means that
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* this hint session can reduce CPU resources and still meet the target duration.
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*/
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CPU_LOAD_DOWN = 1,
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/*
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* This hint indicates an upcoming CPU workload that is completely changed and
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* unknown. It means that the hint session should reset CPU resources to a known
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* baseline to prepare for an arbitrary load, and must wake up if inactive.
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*/
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CPU_LOAD_RESET = 2,
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/*
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* This hint indicates that the most recent CPU workload is resuming after a
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* period of inactivity. It means that the hint session should allocate similar
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* CPU resources to what was used previously, and must wake up if inactive.
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*/
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CPU_LOAD_RESUME = 3,
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};
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/**
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* Sends performance hints to inform the hint session of changes in the workload.
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*
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* @param session The performance hint session instance to update.
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* @param hint The hint to send to the session.
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* @return 0 on success
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* EPIPE if communication with the system service has failed.
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*/
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int APerformanceHint_sendHint(void* session, SessionHint hint);
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/**
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* Return the list of thread ids, this API should only be used for testing only.
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*/
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int APerformanceHint_getThreadIds(void* aPerformanceHintSession,
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int32_t* const threadIds, size_t* const size);
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__END_DECLS
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#endif // ANDROID_PRIVATE_NATIVE_PERFORMANCE_HINT_PRIVATE_H
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