Mercurial > sdl-ios-xcode
annotate src/timer/win32/SDL_systimer.c @ 1361:19418e4422cb
New configure-based build system. Still work in progress, but much improved
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 16 Feb 2006 10:11:48 +0000 |
| parents | c71e05b4dc2e |
| children | d910939febfa |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1180
diff
changeset
|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1180
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1180
diff
changeset
|
8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1180
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1180
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1180
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1180
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
89
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
23 #include "SDL_windows.h" |
| 0 | 24 #include <mmsystem.h> |
| 25 | |
| 26 #include "SDL_timer.h" | |
|
1361
19418e4422cb
New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
|
27 #include "../SDL_timer_c.h" |
| 0 | 28 |
| 29 #ifdef _WIN32_WCE | |
|
1180
bdcb8bb4c831
From: Tyler Montbriand <tsm@accesscomm.ca>
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
30 #error This is WinCE. Please use src/timer/wince/SDL_systimer.c instead. |
|
bdcb8bb4c831
From: Tyler Montbriand <tsm@accesscomm.ca>
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
31 |
|
bdcb8bb4c831
From: Tyler Montbriand <tsm@accesscomm.ca>
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
32 /* but if you really want to use this file, use these #defines... */ |
|
bdcb8bb4c831
From: Tyler Montbriand <tsm@accesscomm.ca>
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
33 #define USE_GETTICKCOUNT |
|
bdcb8bb4c831
From: Tyler Montbriand <tsm@accesscomm.ca>
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
34 #define USE_SETTIMER |
| 0 | 35 #endif |
| 36 | |
| 37 #define TIME_WRAP_VALUE (~(DWORD)0) | |
| 38 | |
|
89
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
39 /* The first (low-resolution) ticks value of the application */ |
| 0 | 40 static DWORD start; |
| 41 | |
|
89
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
42 #ifndef USE_GETTICKCOUNT |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
43 /* Store if a high-resolution performance counter exists on the system */ |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
44 static BOOL hires_timer_available; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
45 /* The first high-resolution ticks value of the application */ |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
46 static LARGE_INTEGER hires_start_ticks; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
47 /* The number of ticks per second of the high-resolution performance counter */ |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
48 static LARGE_INTEGER hires_ticks_per_second; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
49 #endif |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
50 |
| 0 | 51 void SDL_StartTicks(void) |
| 52 { | |
| 53 /* Set first ticks value */ | |
| 54 #ifdef USE_GETTICKCOUNT | |
| 55 start = GetTickCount(); | |
| 56 #else | |
|
326
72d55d02cb47
Disabled QueryPerformanceCounter(), due to problems on Win2K
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
57 #if 0 /* Apparently there are problems with QPC on Win2K */ |
|
89
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
58 if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
59 { |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
60 hires_timer_available = TRUE; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
61 QueryPerformanceCounter(&hires_start_ticks); |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
62 } |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
63 else |
|
326
72d55d02cb47
Disabled QueryPerformanceCounter(), due to problems on Win2K
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
64 #endif |
|
89
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
65 { |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
66 hires_timer_available = FALSE; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
67 timeBeginPeriod(1); /* use 1 ms timer precision */ |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
68 start = timeGetTime(); |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
69 } |
| 0 | 70 #endif |
| 71 } | |
| 72 | |
| 73 Uint32 SDL_GetTicks(void) | |
| 74 { | |
| 75 DWORD now, ticks; | |
|
89
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
76 #ifndef USE_GETTICKCOUNT |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
77 LARGE_INTEGER hires_now; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
78 #endif |
| 0 | 79 |
| 80 #ifdef USE_GETTICKCOUNT | |
| 81 now = GetTickCount(); | |
| 82 #else | |
|
89
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
83 if (hires_timer_available) |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
84 { |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
85 QueryPerformanceCounter(&hires_now); |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
86 |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
87 hires_now.QuadPart -= hires_start_ticks.QuadPart; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
88 hires_now.QuadPart *= 1000; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
89 hires_now.QuadPart /= hires_ticks_per_second.QuadPart; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
90 |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
91 return (DWORD)hires_now.QuadPart; |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
92 } |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
93 else |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
94 { |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
95 now = timeGetTime(); |
|
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
96 } |
| 0 | 97 #endif |
|
89
69b8fac3e1c0
Added Holger Schemel's fix for SDL_GetTicks() on W2K
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
98 |
| 0 | 99 if ( now < start ) { |
| 100 ticks = (TIME_WRAP_VALUE-start) + now; | |
| 101 } else { | |
| 102 ticks = (now - start); | |
| 103 } | |
| 104 return(ticks); | |
| 105 } | |
| 106 | |
| 107 void SDL_Delay(Uint32 ms) | |
| 108 { | |
| 109 Sleep(ms); | |
| 110 } | |
| 111 | |
| 112 #ifdef USE_SETTIMER | |
| 113 | |
| 114 static UINT WIN_timer; | |
| 115 | |
| 116 int SDL_SYS_TimerInit(void) | |
| 117 { | |
| 118 return(0); | |
| 119 } | |
| 120 | |
| 121 void SDL_SYS_TimerQuit(void) | |
| 122 { | |
| 123 return; | |
| 124 } | |
| 125 | |
| 126 /* Forward declaration because this is called by the timer callback */ | |
| 127 int SDL_SYS_StartTimer(void); | |
| 128 | |
| 129 static VOID CALLBACK TimerCallbackProc(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime) | |
| 130 { | |
| 131 Uint32 ms; | |
| 132 | |
| 133 ms = SDL_alarm_callback(SDL_alarm_interval); | |
| 134 if ( ms != SDL_alarm_interval ) { | |
| 135 KillTimer(NULL, idEvent); | |
| 136 if ( ms ) { | |
| 137 SDL_alarm_interval = ROUND_RESOLUTION(ms); | |
| 138 SDL_SYS_StartTimer(); | |
| 139 } else { | |
| 140 SDL_alarm_interval = 0; | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 int SDL_SYS_StartTimer(void) | |
| 146 { | |
| 147 int retval; | |
| 148 | |
| 149 WIN_timer = SetTimer(NULL, 0, SDL_alarm_interval, TimerCallbackProc); | |
| 150 if ( WIN_timer ) { | |
| 151 retval = 0; | |
| 152 } else { | |
| 153 retval = -1; | |
| 154 } | |
| 155 return retval; | |
| 156 } | |
| 157 | |
| 158 void SDL_SYS_StopTimer(void) | |
| 159 { | |
| 160 if ( WIN_timer ) { | |
| 161 KillTimer(NULL, WIN_timer); | |
| 162 WIN_timer = 0; | |
| 163 } | |
| 164 } | |
| 165 | |
| 166 #else /* !USE_SETTIMER */ | |
| 167 | |
| 168 /* Data to handle a single periodic alarm */ | |
| 169 static UINT timerID = 0; | |
| 170 | |
| 171 static void CALLBACK HandleAlarm(UINT uID, UINT uMsg, DWORD dwUser, | |
| 172 DWORD dw1, DWORD dw2) | |
| 173 { | |
| 174 SDL_ThreadedTimerCheck(); | |
| 175 } | |
| 176 | |
| 177 | |
| 178 int SDL_SYS_TimerInit(void) | |
| 179 { | |
| 180 MMRESULT result; | |
| 181 | |
| 182 /* Set timer resolution */ | |
| 183 result = timeBeginPeriod(TIMER_RESOLUTION); | |
| 184 if ( result != TIMERR_NOERROR ) { | |
| 185 SDL_SetError("Warning: Can't set %d ms timer resolution", | |
| 186 TIMER_RESOLUTION); | |
| 187 } | |
| 188 /* Allow 10 ms of drift so we don't chew on CPU */ | |
| 189 timerID = timeSetEvent(TIMER_RESOLUTION,1,HandleAlarm,0,TIME_PERIODIC); | |
| 190 if ( ! timerID ) { | |
| 191 SDL_SetError("timeSetEvent() failed"); | |
| 192 return(-1); | |
| 193 } | |
| 194 return(SDL_SetTimerThreaded(1)); | |
| 195 } | |
| 196 | |
| 197 void SDL_SYS_TimerQuit(void) | |
| 198 { | |
| 199 if ( timerID ) { | |
| 200 timeKillEvent(timerID); | |
| 201 } | |
| 202 timeEndPeriod(TIMER_RESOLUTION); | |
| 203 } | |
| 204 | |
| 205 int SDL_SYS_StartTimer(void) | |
| 206 { | |
| 207 SDL_SetError("Internal logic error: Win32 uses threaded timer"); | |
| 208 return(-1); | |
| 209 } | |
| 210 | |
| 211 void SDL_SYS_StopTimer(void) | |
| 212 { | |
| 213 return; | |
| 214 } | |
| 215 | |
| 216 #endif /* USE_SETTIMER */ |