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annotate src/timer/wince/SDL_systimer.c @ 5127:b6c7a6b07ebf

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Updated main.c for API changes Kees Bakker to sdl The main.c for the template is still targeting SDL1.2. Here is the patch to make it work for SDL1.3 (I'm hoping the mailing lists accepts attachments.) In this patch I have also changed the shell script that assembles the Template. Since there is now only one lib target (same name for "device" and "simulator" version) I copy the simulator library to the destination with the name libSDLSimulator.a. This is not a satisfactory solution, because both libraries are included in the project while only one is needed (depending on the selected environment). However, I'm not fluent with Xcode to say what a better solution would be. Kind regards, Kees Bakker
author Sam Lantinga <slouken@libsdl.org>
date Fri, 28 Jan 2011 10:37:36 -0800
parents 481dabb098ef
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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 #include "SDL_config.h"
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23
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24 #ifdef SDL_TIMER_WINCE
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25
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327f181542f1 Include windows.h in a single point in the source, so we can be consistent about the definition of UNICODE and have core utility functions for Windows that all modules can share.
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26 #include "../../core/windows/SDL_windows.h"
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28 #include "SDL_timer.h"
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29
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30 static Uint64 start_date;
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31 static Uint64 start_ticks;
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32
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33 static Uint64
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34 wce_ticks(void)
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35 {
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36 return ((Uint64) GetTickCount());
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37 }
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38
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39 static Uint64
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40 wce_date(void)
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41 {
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42 union
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43 {
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44 FILETIME ftime;
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45 Uint64 itime;
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46 } ftime;
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47 SYSTEMTIME stime;
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48
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49 GetSystemTime(&stime);
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50 SystemTimeToFileTime(&stime, &ftime.ftime);
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51 ftime.itime /= 10000; // Convert 100ns intervals to 1ms intervals
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52 // Remove ms portion, which can't be relied on
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53 ftime.itime -= (ftime.itime % 1000);
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54 return (ftime.itime);
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55 }
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56
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57 static Sint32
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58 wce_rel_ticks(void)
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59 {
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60 return ((Sint32) (wce_ticks() - start_ticks));
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61 }
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62
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63 static Sint32
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64 wce_rel_date(void)
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65 {
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66 return ((Sint32) (wce_date() - start_date));
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67 }
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69 /* Recard start-time of application for reference */
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70 void
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71 SDL_StartTicks(void)
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72 {
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73 start_date = wce_date();
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74 start_ticks = wce_ticks();
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75 }
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76
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77 /* Return time in ms relative to when SDL was started */
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78 Uint32
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79 SDL_GetTicks()
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80 {
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81 Sint32 offset = wce_rel_date() - wce_rel_ticks();
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82 if ((offset < -1000) || (offset > 1000)) {
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83 // fprintf(stderr,"Time desync(%+d), resyncing\n",offset/1000);
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84 start_ticks -= offset;
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85 }
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86
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87 return ((Uint32) wce_rel_ticks());
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88 }
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90 /* Give up approx. givem milliseconds to the OS. */
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91 void
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92 SDL_Delay(Uint32 ms)
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93 {
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94 Sleep(ms);
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95 }
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96
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97 #endif /* SDL_TIMER_WINCE */
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99 /* vi: set ts=4 sw=4 expandtab: */