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