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annotate include/SDL_power.h @ 3287:77f2f10b81a7

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Fixed bug #570 SDL_SemWaitTimeout in src/thread/generic/SDL_syssem.c line 179 (SVN trunk): --sem->count; should be if (retval == 0) { --sem->count; } Without this, sem->count will underflow on timeout effectively breaking the semaphore. It appears that the implementation has been wrong since the initial revision.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 07:35:06 +0000
parents b7a48f533966
children d3baf5ac4e37
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
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23 #ifndef _SDL_power_h
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24 #define _SDL_power_h
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25
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26 /**
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27 * \file SDL_power.h
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28 *
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29 * Header for the SDL power management routines
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30 */
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31
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32 #include "SDL_stdinc.h"
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33
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34 #include "begin_code.h"
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35 /* Set up for C function definitions, even when using C++ */
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36 #ifdef __cplusplus
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37 /* *INDENT-OFF* */
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38 extern "C" {
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39 /* *INDENT-ON* */
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40 #endif
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41
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42 /**
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43 * \enum SDL_PowerState
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44 *
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45 * \brief The basic state for the system's power supply.
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46 */
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47 typedef enum
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48 {
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49 SDL_POWERSTATE_UNKNOWN, /**< cannot determine power status */
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50 SDL_POWERSTATE_ON_BATTERY, /**< Not plugged in, running on the battery */
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51 SDL_POWERSTATE_NO_BATTERY, /**< Plugged in, no battery available */
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52 SDL_POWERSTATE_CHARGING, /**< Plugged in, charging battery */
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53 SDL_POWERSTATE_CHARGED, /**< Plugged in, battery charged */
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54 } SDL_PowerState;
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55
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56
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57 /**
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58 * \fn int SDL_GetPowerInfo(void)
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59 *
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60 * \brief Get the current power supply details.
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61 *
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62 * \param secs Seconds of battery life left. You can pass a NULL here if
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63 * you don't care. Will return -1 if we can't determine a
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64 * value, or we're not running on a battery.
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65 *
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66 * \param pct Percentage of battery life left, between 0 and 100. You can
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67 * pass a NULL here if you don't care. Will return -1 if we
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68 * can't determine a value, or we're not running on a battery.
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69 *
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70 * \return The state of the battery (if any).
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71 */
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72 extern DECLSPEC SDL_PowerState SDLCALL SDL_GetPowerInfo(int *secs, int *pct);
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73
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74 /* Ends C function definitions when using C++ */
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75 #ifdef __cplusplus
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76 /* *INDENT-OFF* */
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77 }
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78 /* *INDENT-ON* */
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79 #endif
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80 #include "close_code.h"
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81
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82 #endif /* _SDL_power_h */
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83
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84 /* vi: set ts=4 sw=4 expandtab: */