1 /* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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3  * Redistribution and use in source and binary forms, with or without
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29 
30 #ifndef __LOC_TIMER_CPP_H__
31 #define __LOC_TIMER_CPP_H__
32 
33 #include <stddef.h>
34 #include <loc_pla.h>
35 
36 // opaque class to provide service implementation.
37 class LocTimerDelegate;
38 class LocSharedLock;
39 
40 // LocTimer client must extend this class and implementthe callback.
41 // start() / stop() methods are to arm / disarm timer.
42 class LocTimer
43 {
44     LocTimerDelegate* mTimer;
45     LocSharedLock* mLock;
46     // don't really want mLock to be manipulated by clients, yet LocTimer
47     // has to have a reference to the lock so that the delete of LocTimer
48     // and LocTimerDelegate can work together on their share resources.
49     friend class LocTimerDelegate;
50 
51 public:
52     LocTimer();
53     virtual ~LocTimer();
54 
55     // timeOutInMs:  timeout delay in ms
56     // wakeOnExpire: true if to wake up CPU (if sleeping) upon timer
57     //                        expiration and notify the client.
58     //               false if to wait until next time CPU wakes up (if
59     //                        sleeping) and then notify the client.
60     // return:       true on success;
61     //               false on failure, e.g. timer is already running.
62     bool start(uint32_t timeOutInMs, bool wakeOnExpire);
63 
64     // return:       true on success;
65     //               false on failure, e.g. timer is not running.
66     bool stop();
67 
68     //  LocTimer client Should implement this method.
69     //  This method is used for timeout calling back to client. This method
70     //  should be short enough (eg: send a message to your own thread).
71     virtual void timeOutCallback() = 0;
72 };
73 
74 #endif //__LOC_DELAY_H__
75