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annotate src/power/os2/SDL_syspower.c @ 3196:413672b09bb3

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Fixed some compile errors and warnings under Visual C++
author Sam Lantinga <slouken@libsdl.org>
date Fri, 12 Jun 2009 08:41:48 +0000
parents 51750b7a966f
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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
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24 /* !!! FIXME:
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25 * Please note that this code has not been tested (or even compiled!). It
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26 * should, in theory, run on any version of OS/2, and work with any system
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27 * that has APM.SYS loaded. I don't know if ACPI.SYS works.
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28 */
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29
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30 #ifndef SDL_POWER_DISABLED
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31 #ifdef SDL_POWER_OS2
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32
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33 #define INCL_DOSFILEMGR
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34 #define INCL_DOSDEVICES
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35 #define INCL_DOSDEVIOCTL
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36 #define INCL_DOSERRORS
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37 #include <os2.h>
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38
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39 #include "SDL_power.h"
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40
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41 typedef struct
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42 {
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43 USHORT len;
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44 USHORT flags;
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45 UCHAR ac_status;
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46 UCHAR battery_status;
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47 UCHAR battery_life;
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48 UCHAR battery_time_form;
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49 USHORT battery_time;
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50 UCHAR battery_flags;
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51 } PowerStatus;
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52 extern int CompilerAssertPowerStatus[(sizeof(PowerStatus) == 10) ? 1 : -1];
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53
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54
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55 SDL_bool
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56 SDL_GetPowerInfo_OS2(SDL_PowerState * state, int *seconds, int *percent)
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57 {
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58 PowerStatus status;
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59 HFILE hfile = 0;
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60 ULONG action = 0;
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61 APIRET rc = 0;
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62
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63 *state = SDL_POWERSTATE_UNKNOWN;
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64 *percent = -1;
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65 *seconds = -1;
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66
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67 /* open the power management device */
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68 rc = DosOpen("APM$", &hfile, &action, 0, FILE_NORMAL, FILE_OPEN,
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69 OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE, 0);
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70
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71 if (rc == NO_ERROR) {
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72 USHORT iorc = 0;
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73 ULONG iorclen = sizeof(iorc);
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74 ULONG statuslen = sizeof(status);
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75
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76 SDL_memset(&status, '\0', sizeof(status));
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77 status.len = sizeof(status);
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78
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79 rc = DosDevIOCtl(hfile, IOCTL_POWER, POWER_GETPOWERSTATUS, &status,
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80 statuslen, &statuslen, &iorc, iorclen, &iorclen);
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81 DosClose(hfile);
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82
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83 /* (status.flags & 0x1) == power subsystem enabled. */
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84 if ((rc == NO_ERROR) && (status.flags & 0x1)) {
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85 if (statuslen == 7) { /* older OS/2 APM driver? Less fields. */
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86 status.battery_time_form = 0xFF;
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87 status.battery_time = 0;
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88 if (status.battery_status == 0xFF) {
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89 status.battery_flags = 0xFF;
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90 } else {
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91 status.battery_flags = (1 << status.battery_status);
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92 }
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93 }
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94
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95 if (status.battery_flags == 0xFF) { /* unknown state */
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96 *state = SDL_POWERSTATE_UNKNOWN;
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97 } else if (status.battery_flags & (1 << 7)) { /* no battery */
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98 *state = SDL_POWERSTATE_NO_BATTERY;
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99 } else if (status.battery_flags & (1 << 3)) { /* charging */
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100 *state = SDL_POWERSTATE_CHARGING;
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101 need_details = SDL_TRUE;
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102 } else if (status.ac_status == 1) {
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103 *state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */
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104 need_details = SDL_TRUE;
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105 } else {
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106 *state = SDL_POWERSTATE_ON_BATTERY; /* not on AC. */
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107 need_details = SDL_TRUE;
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108 }
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109
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110 if (need_details) {
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111 const int pct = (int) status.battery_life;
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112 const int secs = (int) status.battery_time;
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113
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114 if (pct != 0xFF) { /* 255 == unknown */
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115 *percent = (pct > 100) ? 100 : pct;
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116 }
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117
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118 if (status.battery_time_form == 0xFF) { /* unknown */
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119 *seconds = -1;
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120 } else if (status.battery_time_form == 1) { /* minutes */
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121 *seconds = secs * 60;
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122 } else {
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123 *seconds = secs;
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124 }
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125 }
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126 }
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127 }
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128
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129 return SDL_TRUE; /* always the definitive answer on OS/2. */
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130 }
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131
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132 #endif /* SDL_POWER_OS2 */
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133 #endif /* SDL_POWER_DISABLED */
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134
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135 /* vi: set ts=4 sw=4 expandtab: */