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annotate src/power/SDL_power.c @ 3170:b7a48f533966

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Initial work on power subsystem for SDL 1.3.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 07 Jun 2009 06:06:35 +0000
parents
children 510e3f36c04a
rev   line source
3170
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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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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 #include "SDL_config.h"
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23 #include "SDL_power.h"
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24
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25 /*
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26 * Returns SDL_TRUE if we have a definitive answer.
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27 * SDL_FALSE to try next implementation.
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28 */
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29 typedef SDL_bool
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30 (*SDL_GetPowerInfo_Impl)(SDL_PowerState *state, int *seconds, int *percent);
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31
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32 SDL_bool SDL_GetPowerInfo_Linux_sys_power(SDL_PowerState*, int*, int*);
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33 SDL_bool SDL_GetPowerInfo_Linux_proc_apci(SDL_PowerState*, int*, int*);
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34 SDL_bool SDL_GetPowerInfo_Linux_proc_apm(SDL_PowerState*, int*, int*);
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35 SDL_bool SDL_GetPowerInfo_Windows(SDL_PowerState*, int*, int*);
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36 SDL_bool SDL_GetPowerInfo_MacOSX(SDL_PowerState*, int*, int*);
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37 SDL_bool SDL_GetPowerInfo_OS2(SDL_PowerState*, int*, int*);
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38 SDL_bool SDL_GetPowerInfo_NintendoDS(SDL_PowerState*, int*, int*);
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39
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40 #ifndef SDL_POWER_DISABLED
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41 #ifdef SDL_POWER_HARDWIRED
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42 /* This is for things that _never_ have a battery, like the Dreamcast, etc. */
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43 static SDL_bool
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44 SDL_GetPowerInfo_Hardwired(SDL_PowerState *state, int *seconds, int *percent)
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45 {
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46 *seconds = -1;
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47 *percent = -1;
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48 *state = SDL_POWERSTATE_NO_BATTERY;
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49 return SDL_TRUE;
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50 }
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51 #endif
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52 #endif
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53
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54
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55 static SDL_GetPowerInfo_Impl implementations[] = {
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56 #ifndef SDL_POWER_DISABLED
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57 #ifdef SDL_POWER_LINUX /* in order of preference. More than could work. */
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58 SDL_GetPowerInfo_Linux_sys_power,
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59 SDL_GetPowerInfo_Linux_proc_apci,
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60 SDL_GetPowerInfo_Linux_proc_apm,
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61 #endif
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62 #ifdef SDL_POWER_WINDOWS /* handles Win32, Win64, PocketPC. */
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63 SDL_GetPowerInfo_Windows,
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64 #endif
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65 #ifdef SDL_POWER_MACOSX /* handles Mac OS X, Darwin, iPhone. */
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66 SDL_GetPowerInfo_MacOSX,
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67 #endif
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68 #ifdef SDL_POWER_OS2 /* handles OS/2, Warp, eComStation. */
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69 SDL_GetPowerInfo_OS2,
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70 #endif
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71 #ifdef SDL_POWER_NINTENDODS /* handles Nintendo DS. */
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72 SDL_GetPowerInfo_NintendoDS,
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73 #endif
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74 #ifdef SDL_POWER_HARDWIRED
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75 SDL_GetPowerInfo_Hardwired,
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76 #endif
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77 #endif
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78 };
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79
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80 SDL_PowerState
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81 SDL_GetPowerInfo(int *seconds, int *percent)
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82 {
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83 const int total = sizeof (implementations) / sizeof (implementations[0]);
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84 int _seconds, _percent;
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85 SDL_PowerState retval;
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86 int i;
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87
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88 /* Make these never NULL for platform-specific implementations. */
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89 if (seconds == NULL) {
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90 seconds = &_seconds;
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91 }
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92
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93 if (percent == NULL) {
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94 percent = &_percent;
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95 }
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96
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97 for (i = 0; i < total; i++) {
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98 if (implementations[i](&retval, seconds, percent)) {
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99 return retval;
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100 }
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101 }
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102
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103 /* nothing was definitive. */
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104 *seconds = -1;
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105 *percent = -1;
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106 return SDL_POWERSTATE_UNKNOWN;
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107 }
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108
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109 /* vi: set ts=4 sw=4 expandtab: */
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110