source: trunk/src/winmm/os2timer.h@ 10304

Last change on this file since 10304 was 10269, checked in by sandervl, 22 years ago

Make sure the timer object is not deleted inside the timer callback handler
File size: 3.9 KB
Line 
1/* $Id: os2timer.h,v 1.13 2003-10-13 09:18:37 sandervl Exp $ */
2
3#ifndef __OS2TIMER_H__
4#define __OS2TIMER_H__
5/*
6 * OS/2 Timer class
7 *
8 * Copyright 1998 Sander van Leeuwen (sandervl@xs4all.nl)
9 * Copyright 1999 Patrick Haller (phaller@gmx.net)
10 *
11 * Project Odin Software License can be found in LICENSE.TXT
12 *
13 */
14
15#ifdef _OS2WIN_H
16 #define HEV int
17 #define HTIMER int
18#endif
19
20
21/****************************************************************************
22 * Definitions *
23 ****************************************************************************/
24
25 /* 2001-09-16 PH
26 with the new OS2KRNL's dating 2001-09-14 and later, there is
27 a special CLOCKSCALE feature added which allows for much finer
28 granularity of the OS/2 system timers up to a maximum resolution
29 of 2ms. This is supposed to be enough for most timing issues here.
30
31 Note:
32 we need to add support for dynamic detection of this feature.
33 */
34#define OS2TIMER_RESOLUTION_MINIMUM 1
35#define OS2TIMER_RESOLUTION_MAXIMUM 0x7ffffffe
36
37
38/****************************************************************************
39 * Structures *
40 ****************************************************************************/
41
42/*
43 addEvent
44 removeEvent
45 rescheduleEvent
46 callbackCaller
47*/
48
49
50/****************************************************************************
51 * Class: OS2TimerResolution *
52 ****************************************************************************/
53
54class OS2TimerResolution
55{
56 public:
57 // public entries
58 static BOOL enterResolutionScope(int dwPeriod); // request timer resolution
59 static BOOL leaveResolutionScope(int dwPeriod); // release resolution request
60 static int queryCurrentResolution(); // query maximum resolution
61
62 // public variables
63 int dwPeriod;
64
65 protected:
66 // constructors and destructors
67 OS2TimerResolution(void);
68 OS2TimerResolution(int dwPeriod);
69 ~OS2TimerResolution();
70
71 // simple linked list
72 static OS2TimerResolution* sTimerResolutions; // list of resolution scoped
73 OS2TimerResolution* next; // link to next entry
74};
75
76
77/****************************************************************************
78 * Class: OS2Timer *
79 ****************************************************************************/
80
81class OS2Timer
82{
83public:
84 OS2Timer();
85 ~OS2Timer();
86
87 void TimerHandler();
88 BOOL StartTimer(int period, int resolution, LPTIMECALLBACK lptc,
89 int dwUser, int fuEvent);
90 void StopTimer();
91 void KillTimer();
92
93 DWORD getTimerID() { return timerID; };
94 void setTimerID(DWORD id) { timerID = id; };
95
96#ifdef DEBUG
97 LONG addRef();
98#else
99 LONG addRef() { return InterlockedIncrement(&refCount); };
100#endif
101 LONG getRefCount() { return refCount; };
102 LONG release();
103
104protected:
105
106private:
107 HEV TimerSem;
108 HTIMER TimerHandle;
109 HANDLE hTimerThread;
110 DWORD TimerThreadID;
111 LPTIMECALLBACK clientCallback;
112 DWORD userData;
113 DWORD dwFlags; // corresponds with fuEvent
114
115 BOOL fFatal;
116 int TimerStatus;
117 DWORD timerID;
118 enum {
119 InActive = 0,
120 Running,
121 Stopped
122 };
123
124 LONG refCount;
125
126 static int timerPeriod;
127
128 // Linked list management
129 OS2Timer* next; // Next Timer
130 static OS2Timer* timers; // List of Timer
131
132};
133
134#endif
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