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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
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children 510e3f36c04a
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3169:f294338ca6eb 3170:b7a48f533966
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
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
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23 #include "SDL_power.h"
24
25 /*
26 * Returns SDL_TRUE if we have a definitive answer.
27 * SDL_FALSE to try next implementation.
28 */
29 typedef SDL_bool
30 (*SDL_GetPowerInfo_Impl)(SDL_PowerState *state, int *seconds, int *percent);
31
32 SDL_bool SDL_GetPowerInfo_Linux_sys_power(SDL_PowerState*, int*, int*);
33 SDL_bool SDL_GetPowerInfo_Linux_proc_apci(SDL_PowerState*, int*, int*);
34 SDL_bool SDL_GetPowerInfo_Linux_proc_apm(SDL_PowerState*, int*, int*);
35 SDL_bool SDL_GetPowerInfo_Windows(SDL_PowerState*, int*, int*);
36 SDL_bool SDL_GetPowerInfo_MacOSX(SDL_PowerState*, int*, int*);
37 SDL_bool SDL_GetPowerInfo_OS2(SDL_PowerState*, int*, int*);
38 SDL_bool SDL_GetPowerInfo_NintendoDS(SDL_PowerState*, int*, int*);
39
40 #ifndef SDL_POWER_DISABLED
41 #ifdef SDL_POWER_HARDWIRED
42 /* This is for things that _never_ have a battery, like the Dreamcast, etc. */
43 static SDL_bool
44 SDL_GetPowerInfo_Hardwired(SDL_PowerState *state, int *seconds, int *percent)
45 {
46 *seconds = -1;
47 *percent = -1;
48 *state = SDL_POWERSTATE_NO_BATTERY;
49 return SDL_TRUE;
50 }
51 #endif
52 #endif
53
54
55 static SDL_GetPowerInfo_Impl implementations[] = {
56 #ifndef SDL_POWER_DISABLED
57 #ifdef SDL_POWER_LINUX /* in order of preference. More than could work. */
58 SDL_GetPowerInfo_Linux_sys_power,
59 SDL_GetPowerInfo_Linux_proc_apci,
60 SDL_GetPowerInfo_Linux_proc_apm,
61 #endif
62 #ifdef SDL_POWER_WINDOWS /* handles Win32, Win64, PocketPC. */
63 SDL_GetPowerInfo_Windows,
64 #endif
65 #ifdef SDL_POWER_MACOSX /* handles Mac OS X, Darwin, iPhone. */
66 SDL_GetPowerInfo_MacOSX,
67 #endif
68 #ifdef SDL_POWER_OS2 /* handles OS/2, Warp, eComStation. */
69 SDL_GetPowerInfo_OS2,
70 #endif
71 #ifdef SDL_POWER_NINTENDODS /* handles Nintendo DS. */
72 SDL_GetPowerInfo_NintendoDS,
73 #endif
74 #ifdef SDL_POWER_HARDWIRED
75 SDL_GetPowerInfo_Hardwired,
76 #endif
77 #endif
78 };
79
80 SDL_PowerState
81 SDL_GetPowerInfo(int *seconds, int *percent)
82 {
83 const int total = sizeof (implementations) / sizeof (implementations[0]);
84 int _seconds, _percent;
85 SDL_PowerState retval;
86 int i;
87
88 /* Make these never NULL for platform-specific implementations. */
89 if (seconds == NULL) {
90 seconds = &_seconds;
91 }
92
93 if (percent == NULL) {
94 percent = &_percent;
95 }
96
97 for (i = 0; i < total; i++) {
98 if (implementations[i](&retval, seconds, percent)) {
99 return retval;
100 }
101 }
102
103 /* nothing was definitive. */
104 *seconds = -1;
105 *percent = -1;
106 return SDL_POWERSTATE_UNKNOWN;
107 }
108
109 /* vi: set ts=4 sw=4 expandtab: */
110