source: trunk/src/winmm/os2timer.h

Last change on this file 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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