1 /* 2 * Copyright (C) 2016 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 _TIMER_H_ 18 #define _TIMER_H_ 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 #include <stdbool.h> 25 #include <stdint.h> 26 27 28 #define MAX_TIMERS 8 /* we *REALLY* do not want these proliferating endlessly, hence a small limit */ 29 30 struct TimerEvent { 31 uint32_t timerId; 32 void *data; 33 }; 34 35 36 typedef void (*TimTimerCbkF)(uint32_t timerId, void* data); 37 38 39 40 uint64_t timGetTime(void); /* Time since some stable reference point in nanoseconds */ 41 42 uint32_t timTimerSet(uint64_t length, uint32_t jitterPpm, uint32_t driftPpm, TimTimerCbkF cbk, void* data, bool oneShot); /* return timer id or 0 if failed */ 43 uint32_t timTimerSetAsApp(uint64_t length, uint32_t jitterPpm, uint32_t driftPpm, uint32_t tid, void* data, bool oneShot); /* return timer id or 0 if failed */ 44 bool timTimerCancel(uint32_t timerId); 45 int timTimerCancelAll(uint32_t tid); 46 47 48 //called by interrupt routine. ->true if any timers were fired 49 bool timIntHandler(void); 50 51 52 //init subsystem 53 void timInit(void); 54 55 56 57 58 #ifdef __cplusplus 59 } 60 #endif 61 62 #endif 63 64