1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_AUDIO_FAST_THREAD_STATE_H 18 #define ANDROID_AUDIO_FAST_THREAD_STATE_H 19 20 #include "Configuration.h" 21 #include <stdint.h> 22 #include <media/nblog/NBLog.h> 23 24 namespace android { 25 26 struct FastThreadDumpState; 27 28 // Represents a single state of a FastThread 29 struct FastThreadState { 30 FastThreadState(); 31 /*virtual*/ ~FastThreadState(); 32 33 typedef uint32_t Command; 34 static const Command 35 INITIAL = 0, // used only for the initial state 36 HOT_IDLE = 1, // do nothing 37 COLD_IDLE = 2, // wait for the futex 38 IDLE = 3, // either HOT_IDLE or COLD_IDLE 39 EXIT = 4; // exit from thread 40 // additional values defined per subclass 41 Command mCommand; // current command 42 int32_t* mColdFutexAddr; // for COLD_IDLE only, pointer to the associated futex 43 unsigned mColdGen; // increment when COLD_IDLE is requested so it's only performed once 44 45 // This might be a one-time configuration rather than per-state 46 FastThreadDumpState* mDumpState; // if non-NULL, then update dump state periodically 47 NBLog::Writer* mNBLogWriter; // non-blocking logger 48 49 // returns NULL if command belongs to a subclass 50 static const char *commandToString(Command command); 51 }; // struct FastThreadState 52 53 } // android 54 55 #endif // ANDROID_AUDIO_FAST_THREAD_STATE_H 56