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Date: Mon, 10 Oct 2005 13:09:32 +0300 From: Tommi Kyntola <tommi.kyntola@ray.fi> To: sdl@libsdl.org Subject: [SDL] [RFC] get_ticks broken on linux It uses gettimeofday to calculate the timedifference. Gettimeofday returns current time which is seldom monotonous. This breaks SDL timer subsystem. (time callbacks and all that get borked when the time difference ms is suddenly ~ 2^32) I posted a message about this earlier but got no response. Some thoughts on this matter would be appreciated. (Or even an explanation for the lack of interest.) A patch below would use the posix timers that have been around since posix 93 and do provide a good source of monotonous time on linux boxes (and on few others too). The following patch is also availabe at: http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch It's against 1.2.9, but I can easily rediffit against the cvs branch is needed. cheers, Tommi Kyntola tommi.kyntola@ray.fi
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 11 Oct 2005 18:16:12 +0000
parents c5b2b6d2d1fe
children d910939febfa
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2003 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /*
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24 Obscuring code: maximum number of windows above ours (inclusive)
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25
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26 Note: this doesn't work too well in practice and should be
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27 phased out when we add OpenGL 2D acceleration. It was never
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28 enabled in the first place, so this shouldn't be a problem ;-)
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29 */
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30 #define kMaxWindows 256
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31
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32 /* Some of the Core Graphics Server API for obscuring code */
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33 #define kCGSWindowLevelTop 2147483632
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34 #define kCGSWindowLevelDockIconDrag 500
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35 #define kCGSWindowLevelDockMenu 101
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36 #define kCGSWindowLevelMenuIgnore 21
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37 #define kCGSWindowLevelMenu 20
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38 #define kCGSWindowLevelDockLabel 12
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39 #define kCGSWindowLevelDockIcon 11
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40 #define kCGSWindowLevelDock 10
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41 #define kCGSWindowLevelUtility 3
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42 #define kCGSWindowLevelNormal 0
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43
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44 /*
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45 For completeness; We never use these window levels, they are always below us
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46 #define kCGSWindowLevelMBarShadow -20
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47 #define kCGSWindowLevelDesktopPicture -2147483647
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48 #define kCGSWindowLevelDesktop -2147483648
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49 */
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50
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51 typedef CGError CGSError;
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52 typedef long CGSWindowCount;
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53 typedef void * CGSConnectionID;
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54 typedef int CGSWindowID;
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55 typedef CGSWindowID* CGSWindowIDList;
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56 typedef CGWindowLevel CGSWindowLevel;
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57 typedef NSRect CGSRect;
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58
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59 extern CGSConnectionID _CGSDefaultConnection ();
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60
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61 extern CGSError CGSGetOnScreenWindowList (CGSConnectionID cid,
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62 CGSConnectionID owner,
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63 CGSWindowCount listCapacity,
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64 CGSWindowIDList list,
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65 CGSWindowCount *listCount);
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66
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67 extern CGSError CGSGetScreenRectForWindow (CGSConnectionID cid,
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68 CGSWindowID wid,
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69 CGSRect *rect);
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70
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71 extern CGWindowLevel CGSGetWindowLevel (CGSConnectionID cid,
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72 CGSWindowID wid,
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73 CGSWindowLevel *level);
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74
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75 extern CGSError CGSDisplayHWFill (CGDirectDisplayID id, unsigned int x, unsigned int y,
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76 unsigned int w, unsigned int h, unsigned int color);
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77
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78 extern CGSError CGSDisplayCanHWFill (CGDirectDisplayID id);
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79
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80 extern CGSError CGSGetMouseEnabledFlags (CGSConnectionID cid, CGSWindowID wid, int *flags);
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81
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82 int CGSDisplayHWSync (CGDirectDisplayID id);
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83