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comparison src/power/os2/SDL_syspower.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
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children 51750b7a966f
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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
24 /* !!! FIXME:
25 * Please note that this code has not been tested (or even compiled!). It
26 * should, in theory, run on any version of OS/2, and work with any system
27 * that has APM.SYS loaded. I don't know if ACPI.SYS works.
28 */
29
30 #ifndef SDL_POWER_DISABLED
31 #ifdef SDL_POWER_OS2
32
33 #define INCL_DOSFILEMGR
34 #define INCL_DOSDEVICES
35 #define INCL_DOSDEVIOCTL
36 #define INCL_DOSERRORS
37 #include <os2.h>
38
39 #include "SDL_power.h"
40
41 typedef struct {
42 USHORT len;
43 USHORT flags;
44 UCHAR ac_status;
45 UCHAR battery_status;
46 UCHAR battery_life;
47 UCHAR battery_time_form;
48 USHORT battery_time;
49 UCHAR battery_flags;
50 } PowerStatus;
51 extern int CompilerAssertPowerStatus[(sizeof (PowerStatus) == 10) ? 1 : -1];
52
53
54 SDL_bool
55 SDL_GetPowerInfo_OS2(SDL_PowerState *state, int *seconds, int *percent)
56 {
57 PowerStatus status;
58 HFILE hfile = 0;
59 ULONG action = 0;
60 APIRET rc = 0;
61
62 *state = SDL_POWERSTATE_UNKNOWN;
63 *percent = -1;
64 *seconds = -1;
65
66 /* open the power management device */
67 rc = DosOpen("APM$", &hfile, &action, 0, FILE_NORMAL, FILE_OPEN,
68 OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE, 0);
69
70 if (rc == NO_ERROR) {
71 USHORT iorc = 0;
72 ULONG iorclen = sizeof (iorc);
73 ULONG statuslen = sizeof (status);
74
75 SDL_memset(&status, '\0', sizeof (status));
76 status.len = sizeof (status);
77
78 rc = DosDevIOCtl(hfile, IOCTL_POWER, POWER_GETPOWERSTATUS, &status,
79 statuslen, &statuslen, &iorc, iorclen, &iorclen);
80 DosClose(hfile);
81
82 /* (status.flags & 0x1) == power subsystem enabled. */
83 if ((rc == NO_ERROR) && (status.flags & 0x1)) {
84 if (statuslen == 7) { /* older OS/2 APM driver? Less fields. */
85 status.battery_time_form = 0xFF;
86 status.battery_time = 0;
87 if (status.battery_status == 0xFF) {
88 status.battery_flags = 0xFF;
89 } else {
90 status.battery_flags = (1 << status.battery_status);
91 }
92 }
93
94 if (status.battery_flags == 0xFF) { /* unknown state */
95 *state = SDL_POWERSTATE_UNKNOWN;
96 } else if (status.battery_flags & (1 << 7)) { /* no battery */
97 *state = SDL_POWERSTATE_NO_BATTERY;
98 } else if (status.battery_flags & (1 << 3)) { /* charging */
99 *state = SDL_POWERSTATE_CHARGING;
100 need_details = SDL_TRUE;
101 } else if (status.ac_status == 1) {
102 *state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */
103 need_details = SDL_TRUE;
104 } else {
105 *state = SDL_POWERSTATE_ON_BATTERY; /* not on AC. */
106 need_details = SDL_TRUE;
107 }
108
109 if (need_details) {
110 const int pct = (int) status.battery_life;
111 const int secs = (int) status.battery_time;
112
113 if (pct != 0xFF) { /* 255 == unknown */
114 *percent = (pct > 100) ? 100 : pct;
115 }
116
117 if (status.battery_time_form == 0xFF) { /* unknown */
118 *seconds = -1;
119 } else if (status.battery_time_form == 1) { /* minutes */
120 *seconds = secs * 60;
121 } else {
122 *seconds = secs;
123 }
124 }
125 }
126 }
127
128 return SDL_TRUE; /* always the definitive answer on OS/2. */
129 }
130
131 #endif /* SDL_POWER_OS2 */
132 #endif /* SDL_POWER_DISABLED */
133
134 /* vi: set ts=4 sw=4 expandtab: */
135