Mercurial > sdl-ios-xcode
annotate src/timer/epoc/SDL_systimer.cpp @ 1180:bdcb8bb4c831
From: Tyler Montbriand <tsm@accesscomm.ca>
To: sdl@libsdl.org
Date: Fri, 30 Sep 2005 02:24:50 -0600
Subject: [SDL] WinCE timers, continued
Here's a strange timer for Windows CE that doesn't ignore time across
suspends. It uses GetSystemTime to keep the time continuous, and GetTicks to
get finer-grained readings than 1 second. It detects the difference between
the GetTicks time and GetSystemTime time on power-on to keep the error within
one second max.
It's not a patch on the current win32 timer code -- took one look at that and
figured it had more than enough #ifdefs already. It's windows-ce specific.
Another thing I've noticed is that the Windows CE 4.0 and newer API has
functions warn processes about suspends. This is something SDL REALLY needs
for audio in particular, because turning it off while it's playing causes
anything that uses audio to hardlock the system on power-on. Unfortunately I
don't have 4.0 to play with. :(
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Tue, 22 Nov 2005 07:10:07 +0000 |
parents | f6ffac90895c |
children | 19418e4422cb |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
297
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
173
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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 SDL_systimer.cpp |
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25 |
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26 Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi) |
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27 */ |
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28 |
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29 #include <e32std.h> |
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30 #include <e32hal.h> |
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31 |
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32 extern "C" { |
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33 #include "SDL_error.h" |
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34 #include "SDL_thread.h" |
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35 #include "SDL_timer.h" |
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36 #include "SDL_timer_c.h" |
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37 |
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38 static TUint start = 0; |
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39 static TInt tickPeriodMilliSeconds; |
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40 |
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41 |
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42 void SDL_StartTicks(void) |
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43 { |
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44 /* Set first ticks value */ |
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45 start = User::TickCount(); |
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46 |
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47 TTimeIntervalMicroSeconds32 period; |
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48 TInt tmp = UserHal::TickPeriod(period); |
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49 tickPeriodMilliSeconds = period.Int() / 1000; |
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50 } |
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51 |
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52 Uint32 SDL_GetTicks(void) |
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53 { |
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54 TUint deltaTics = User::TickCount() - start; |
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55 return(deltaTics * tickPeriodMilliSeconds); |
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56 } |
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57 |
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58 void SDL_Delay(Uint32 ms) |
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59 { |
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60 |
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61 User::After(TTimeIntervalMicroSeconds32(ms*1000)); |
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62 } |
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63 |
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64 /* Data to handle a single periodic alarm */ |
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65 static int timer_alive = 0; |
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66 static SDL_Thread *timer = NULL; |
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67 |
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68 static int RunTimer(void *unused) |
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69 { |
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70 Uint32 ms; |
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71 |
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72 while ( timer_alive ) { |
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73 if ( SDL_timer_running ) { |
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74 SDL_ThreadedTimerCheck(); |
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75 } |
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76 SDL_Delay(10); |
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77 } |
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78 return(0); |
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79 } |
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80 |
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81 /* This is only called if the event thread is not running */ |
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82 int SDL_SYS_TimerInit(void) |
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83 { |
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84 timer_alive = 1; |
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85 timer = SDL_CreateThread(RunTimer, NULL); |
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86 if ( timer == NULL ) |
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87 return(-1); |
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88 return(SDL_SetTimerThreaded(1)); |
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89 } |
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90 |
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91 void SDL_SYS_TimerQuit(void) |
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92 { |
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93 timer_alive = 0; |
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94 if ( timer ) { |
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95 SDL_WaitThread(timer, NULL); |
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96 timer = NULL; |
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97 } |
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98 } |
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99 |
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100 int SDL_SYS_StartTimer(void) |
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101 { |
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102 SDL_SetError("Internal logic error: Epoc uses threaded timer"); |
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103 return(-1); |
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104 } |
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105 |
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106 void SDL_SYS_StopTimer(void) |
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107 { |
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108 return; |
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109 } |
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110 |
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111 }; // extern "C" |