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56 lines
2.0 KiB
56 lines
2.0 KiB
/*
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* Copyright (C) 2014 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_AUDIO_FAST_THREAD_STATE_H
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#define ANDROID_AUDIO_FAST_THREAD_STATE_H
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#include "Configuration.h"
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#include <stdint.h>
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#include <media/nblog/NBLog.h>
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namespace android {
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struct FastThreadDumpState;
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// Represents a single state of a FastThread
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struct FastThreadState {
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FastThreadState();
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/*virtual*/ ~FastThreadState();
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typedef uint32_t Command;
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static const Command
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INITIAL = 0, // used only for the initial state
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HOT_IDLE = 1, // do nothing
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COLD_IDLE = 2, // wait for the futex
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IDLE = 3, // either HOT_IDLE or COLD_IDLE
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EXIT = 4; // exit from thread
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// additional values defined per subclass
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Command mCommand; // current command
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int32_t* mColdFutexAddr; // for COLD_IDLE only, pointer to the associated futex
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unsigned mColdGen; // increment when COLD_IDLE is requested so it's only performed once
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// This might be a one-time configuration rather than per-state
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FastThreadDumpState* mDumpState; // if non-NULL, then update dump state periodically
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NBLog::Writer* mNBLogWriter; // non-blocking logger
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// returns NULL if command belongs to a subclass
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static const char *commandToString(Command command);
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}; // struct FastThreadState
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} // android
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#endif // ANDROID_AUDIO_FAST_THREAD_STATE_H
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