iokit/Kernel/IOPMPowerSource.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 #include <IOKit/pwr_mgt/IOPMPowerSource.h>
  27
  28 #define super OSObject
  29
  30 OSDefineMetaClassAndStructors(IOPMPowerSource, OSObject)
  31
  32 // **********************************************************************************
  33 // init
  34 //
  35 // **********************************************************************************
  36 bool IOPMPowerSource::init (unsigned short whichBatteryIndex)
  37 {
  38   if (!super::init ())
  39     return false;
  40
  41   bBatteryIndex = whichBatteryIndex;
  42   nextInList    = 0;
  43
  44   return true;
  45 }
  46
  47 // **********************************************************************************
  48 // capacityPercentRemaining
  49 //
  50 // **********************************************************************************
  51 unsigned long IOPMPowerSource::capacityPercentRemaining (void)
  52 {
  53    unsigned long percentage = 0;
  54
  55    if (bMaxCapacity > 0)
  56      percentage = (bCurCapacity * 100) / bMaxCapacity;
  57
  58    // always return a non-zero value unless the real capacity IS zero.
  59    if (percentage == 0 && bCurCapacity > 0)
  60      percentage = 1;
  61
  62    return percentage;
  63 }
  64
  65 // **********************************************************************************
  66 // atWarnLevel
  67 //
  68 // **********************************************************************************
  69 bool IOPMPowerSource::atWarnLevel (void)
  70 {
  71   return bFlags & kBatteryAtWarn;
  72 }
  73
  74 // **********************************************************************************
  75 // acConnected
  76 //
  77 // **********************************************************************************
  78 bool IOPMPowerSource::acConnected (void)
  79 {
  80   return bFlags & kACInstalled;
  81 }
  82
  83 // **********************************************************************************
  84 // depleted
  85 //
  86 // **********************************************************************************
  87 bool IOPMPowerSource::depleted (void)
  88 {
  89   return bFlags & kBatteryDepleted;
  90 }
  91
  92 // **********************************************************************************
  93 // isInstalled
  94 //
  95 // **********************************************************************************
  96 bool IOPMPowerSource::isInstalled (void)
  97 {
  98   return bFlags & kBatteryInstalled;
  99 }
 100
 101 // **********************************************************************************
 102 // isCharging
 103 //
 104 // **********************************************************************************
 105 bool IOPMPowerSource::isCharging (void)
 106 {
 107   return bFlags & kBatteryCharging;
 108 }
 109
 110 // **********************************************************************************
 111 // timeRemaining
 112 //
 113 // **********************************************************************************
 114 unsigned long IOPMPowerSource::timeRemaining (void)
 115 {
 116   return bTimeRemaining;
 117 }
 118
 119 // **********************************************************************************
 120 // maxCapacity
 121 //
 122 // **********************************************************************************
 123 unsigned long IOPMPowerSource::maxCapacity (void)
 124 {
 125   return bMaxCapacity;
 126 }
 127
 128 // **********************************************************************************
 129 // curCapacity
 130 //
 131 // **********************************************************************************
 132 unsigned long IOPMPowerSource::curCapacity (void)
 133 {
 134   return bCurCapacity;
 135 }
 136
 137 // **********************************************************************************
 138 // currentDrawn
 139 //
 140 // **********************************************************************************
 141 long IOPMPowerSource::currentDrawn (void)
 142 {
 143   return bCurrent;
 144 }
 145
 146 // **********************************************************************************
 147 // voltage
 148 //
 149 // **********************************************************************************
 150
 151 unsigned long IOPMPowerSource::voltage (void)
 152 {
 153   return bVoltage;
 154 }
 155
 156 // **********************************************************************************
 157 // updateStatus
 158 //
 159 // **********************************************************************************
 160
 161 void IOPMPowerSource::updateStatus (void)
 162 {
 163
 164 }
 165
 166
 167
 168
 169