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  16  /* 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 uint32_t timTimerSetNew(uint64_t length, const void* data, bool oneShot);
45 bool timTimerCancel(uint32_t timerId);
46 bool timTimerCancelEx(uint32_t timerId, bool cancelPending);
47 int timTimerCancelAll(uint32_t tid);
48 
49 
50 //called by interrupt routine. ->true if any timers were fired
51 bool timIntHandler(void);
52 
53 
54 //init subsystem
55 void timInit(void);
56 
57 
58 
59 
60 #ifdef __cplusplus
61 }
62 #endif
63 
64 #endif
65