1 | /* $Id: ParallelPortImpl.cpp 66939 2017-05-17 16:27:41Z vboxsync $ */
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2 | /** @file
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3 | * VirtualBox COM class implementation
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2016 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 | #include "ParallelPortImpl.h"
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19 | #include "MachineImpl.h"
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20 | #include "VirtualBoxImpl.h"
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21 |
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22 | #include <iprt/string.h>
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23 | #include <iprt/cpp/utils.h>
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24 |
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25 | #include <VBox/settings.h>
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26 |
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27 | #include "AutoStateDep.h"
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28 | #include "AutoCaller.h"
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29 | #include "Logging.h"
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30 |
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31 | ////////////////////////////////////////////////////////////////////////////////
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32 | //
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33 | // ParallelPort private data definition
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34 | //
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35 | ////////////////////////////////////////////////////////////////////////////////
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36 |
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37 | struct ParallelPort::Data
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38 | {
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39 | Data()
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40 | : fModified(false),
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41 | pMachine(NULL)
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42 | { }
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43 |
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44 | bool fModified;
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45 |
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46 | Machine * const pMachine;
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47 | const ComObjPtr<ParallelPort> pPeer;
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48 |
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49 | Backupable<settings::ParallelPort> bd;
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50 | };
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51 |
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52 | // constructor / destructor
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53 | /////////////////////////////////////////////////////////////////////////////
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54 | DEFINE_EMPTY_CTOR_DTOR(ParallelPort)
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55 |
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56 | HRESULT ParallelPort::FinalConstruct()
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57 | {
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58 | return BaseFinalConstruct();
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59 | }
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60 |
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61 | void ParallelPort::FinalRelease()
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62 | {
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63 | uninit();
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64 | BaseFinalRelease();
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65 | }
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66 |
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67 | // public initializer/uninitializer for internal purposes only
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68 | /////////////////////////////////////////////////////////////////////////////
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69 |
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70 | /**
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71 | * Initializes the Parallel Port object.
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72 | *
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73 | * @param aParent Handle of the parent object.
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74 | * @param aSlot Slotnumber this parallel port is plugged into.
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75 | */
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76 | HRESULT ParallelPort::init(Machine *aParent, ULONG aSlot)
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77 | {
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78 | LogFlowThisFunc(("aParent=%p, aSlot=%d\n", aParent, aSlot));
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79 |
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80 | ComAssertRet(aParent, E_INVALIDARG);
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81 |
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82 | /* Enclose the state transition NotReady->InInit->Ready */
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83 | AutoInitSpan autoInitSpan(this);
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84 | AssertReturn(autoInitSpan.isOk(), E_FAIL);
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85 |
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86 | m = new Data;
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87 |
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88 | unconst(m->pMachine) = aParent;
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89 | /* m->pPeer is left null */
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90 |
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91 | m->bd.allocate();
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92 |
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93 | /* initialize data */
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94 | m->bd->ulSlot = aSlot;
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95 |
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96 | /* Confirm a successful initialization */
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97 | autoInitSpan.setSucceeded();
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98 |
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99 | return S_OK;
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100 | }
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101 |
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102 | /**
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103 | * Initializes the Parallel Port object given another serial port object
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104 | * (a kind of copy constructor). This object shares data with
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105 | * the object passed as an argument.
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106 | *
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107 | * @note This object must be destroyed before the original object
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108 | * it shares data with is destroyed.
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109 | *
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110 | * @note Locks @a aThat object for reading.
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111 | */
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112 | HRESULT ParallelPort::init(Machine *aParent, ParallelPort *aThat)
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113 | {
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114 | LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));
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115 |
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116 | ComAssertRet(aParent && aThat, E_INVALIDARG);
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117 |
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118 | /* Enclose the state transition NotReady->InInit->Ready */
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119 | AutoInitSpan autoInitSpan(this);
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120 | AssertReturn(autoInitSpan.isOk(), E_FAIL);
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121 |
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122 | m = new Data;
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123 |
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124 | unconst(m->pMachine) = aParent;
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125 | unconst(m->pPeer) = aThat;
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126 |
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127 | AutoCaller thatCaller(aThat);
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128 | AssertComRCReturnRC(thatCaller.rc());
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129 |
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130 | AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
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131 | m->bd.share(aThat->m->bd);
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132 |
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133 | /* Confirm a successful initialization */
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134 | autoInitSpan.setSucceeded();
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135 |
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136 | return S_OK;
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137 | }
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138 |
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139 | /**
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140 | * Initializes the guest object given another guest object
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141 | * (a kind of copy constructor). This object makes a private copy of data
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142 | * of the original object passed as an argument.
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143 | *
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144 | * @note Locks @a aThat object for reading.
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145 | */
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146 | HRESULT ParallelPort::initCopy(Machine *aParent, ParallelPort *aThat)
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147 | {
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148 | LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));
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149 |
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150 | ComAssertRet(aParent && aThat, E_INVALIDARG);
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151 |
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152 | /* Enclose the state transition NotReady->InInit->Ready */
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153 | AutoInitSpan autoInitSpan(this);
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154 | AssertReturn(autoInitSpan.isOk(), E_FAIL);
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155 |
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156 | m = new Data;
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157 |
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158 | unconst(m->pMachine) = aParent;
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159 | /* m->pPeer is left null */
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160 |
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161 | AutoCaller thatCaller(aThat);
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162 | AssertComRCReturnRC(thatCaller.rc());
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163 |
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164 | AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
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165 | m->bd.attachCopy(aThat->m->bd);
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166 |
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167 | /* Confirm a successful initialization */
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168 | autoInitSpan.setSucceeded();
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169 |
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170 | return S_OK;
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171 | }
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172 |
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173 | /**
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174 | * Uninitializes the instance and sets the ready flag to FALSE.
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175 | * Called either from FinalRelease() or by the parent when it gets destroyed.
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176 | */
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177 | void ParallelPort::uninit()
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178 | {
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179 | LogFlowThisFunc(("\n"));
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180 |
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181 | /* Enclose the state transition Ready->InUninit->NotReady */
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182 | AutoUninitSpan autoUninitSpan(this);
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183 | if (autoUninitSpan.uninitDone())
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184 | return;
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185 |
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186 | m->bd.free();
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187 |
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188 | unconst(m->pPeer) = NULL;
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189 | unconst(m->pMachine) = NULL;
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190 |
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191 | delete m;
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192 | m = NULL;
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193 | }
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194 |
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195 | // IParallelPort properties
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196 | /////////////////////////////////////////////////////////////////////////////
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197 |
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198 | HRESULT ParallelPort::getEnabled(BOOL *aEnabled)
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199 | {
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200 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
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201 |
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202 | *aEnabled = m->bd->fEnabled;
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203 |
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204 | return S_OK;
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205 | }
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206 |
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207 | HRESULT ParallelPort::setEnabled(BOOL aEnabled)
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208 | {
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209 | LogFlowThisFunc(("aEnabled=%RTbool\n", aEnabled));
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210 | /* the machine needs to be mutable */
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211 | AutoMutableStateDependency adep(m->pMachine);
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212 | if (FAILED(adep.rc())) return adep.rc();
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213 |
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214 | AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
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215 |
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216 | if (m->bd->fEnabled != RT_BOOL(aEnabled))
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217 | {
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218 | m->bd.backup();
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219 | m->bd->fEnabled = RT_BOOL(aEnabled);
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220 |
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221 | m->fModified = true;
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222 | // leave the lock before informing callbacks
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223 | alock.release();
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224 |
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225 | AutoWriteLock mlock(m->pMachine COMMA_LOCKVAL_SRC_POS);
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226 | m->pMachine->i_setModified(Machine::IsModified_ParallelPorts);
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227 | mlock.release();
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228 |
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229 | m->pMachine->i_onParallelPortChange(this);
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230 | }
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231 |
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232 | return S_OK;
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233 | }
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234 |
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235 | HRESULT ParallelPort::getSlot(ULONG *aSlot)
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236 | {
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237 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
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238 |
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239 | *aSlot = m->bd->ulSlot;
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240 |
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241 | return S_OK;
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242 | }
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243 |
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244 | HRESULT ParallelPort::getIRQ(ULONG *aIRQ)
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245 | {
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246 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
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247 |
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248 | *aIRQ = m->bd->ulIRQ;
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249 |
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250 | return S_OK;
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251 | }
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252 |
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253 | HRESULT ParallelPort::setIRQ(ULONG aIRQ)
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254 | {
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255 | /* check IRQ limits
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256 | * (when changing this, make sure it corresponds to XML schema */
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257 | if (aIRQ > 255)
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258 | return setError(E_INVALIDARG,
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259 | tr("Invalid IRQ number of the parallel port %d: %lu (must be in range [0, %lu])"),
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260 | m->bd->ulSlot, aIRQ, 255);
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261 |
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262 | /* the machine needs to be mutable */
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263 | AutoMutableStateDependency adep(m->pMachine);
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264 | if (FAILED(adep.rc())) return adep.rc();
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265 |
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266 | AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
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267 |
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268 | if (m->bd->ulIRQ != aIRQ)
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269 | {
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270 | m->bd.backup();
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271 | m->bd->ulIRQ = aIRQ;
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272 |
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273 | m->fModified = true;
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274 | // leave the lock before informing callbacks
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275 | alock.release();
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276 |
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277 | AutoWriteLock mlock(m->pMachine COMMA_LOCKVAL_SRC_POS);
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278 | m->pMachine->i_setModified(Machine::IsModified_ParallelPorts);
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279 | mlock.release();
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280 |
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281 | m->pMachine->i_onParallelPortChange(this);
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282 | }
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283 |
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284 | return S_OK;
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285 | }
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286 |
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287 | HRESULT ParallelPort::getIOBase(ULONG *aIOBase)
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288 | {
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289 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
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290 |
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291 | *aIOBase = m->bd->ulIOBase;
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292 |
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293 | return S_OK;
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294 | }
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295 |
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296 | HRESULT ParallelPort::setIOBase(ULONG aIOBase)
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297 | {
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298 | /* check IOBase limits
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299 | * (when changing this, make sure it corresponds to XML schema */
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300 | if (aIOBase > 0xFFFF)
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301 | return setError(E_INVALIDARG,
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302 | tr("Invalid I/O port base address of the parallel port %d: %lu (must be in range [0, 0x%X])"),
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303 | m->bd->ulSlot, aIOBase, 0, 0xFFFF);
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304 |
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305 | /* the machine needs to be mutable */
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306 | AutoMutableStateDependency adep(m->pMachine);
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307 | if (FAILED(adep.rc())) return adep.rc();
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308 |
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309 | AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
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310 |
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311 | if (m->bd->ulIOBase != aIOBase)
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312 | {
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313 | m->bd.backup();
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314 | m->bd->ulIOBase = aIOBase;
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315 |
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316 | m->fModified = true;
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317 | // leave the lock before informing callbacks
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318 | alock.release();
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319 |
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320 | AutoWriteLock mlock(m->pMachine COMMA_LOCKVAL_SRC_POS);
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321 | m->pMachine->i_setModified(Machine::IsModified_ParallelPorts);
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322 | mlock.release();
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323 |
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324 | m->pMachine->i_onParallelPortChange(this);
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325 | }
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326 |
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327 | return S_OK;
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328 | }
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329 |
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330 |
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331 | HRESULT ParallelPort::getPath(com::Utf8Str &aPath)
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332 | {
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333 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
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334 | aPath = m->bd->strPath;
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335 | return S_OK;
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336 | }
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337 |
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338 |
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339 | HRESULT ParallelPort::setPath(const com::Utf8Str &aPath)
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340 | {
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341 | /* the machine needs to be mutable */
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342 | AutoMutableOrSavedStateDependency adep(m->pMachine);
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343 | if (FAILED(adep.rc())) return adep.rc();
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344 |
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345 | AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
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346 |
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347 | if (aPath != m->bd->strPath)
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348 | {
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349 | m->bd.backup();
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350 | m->bd->strPath = aPath;
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351 |
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352 | m->fModified = true;
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353 |
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354 | // leave the lock before informing callbacks
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355 | alock.release();
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356 |
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357 | AutoWriteLock mlock(m->pMachine COMMA_LOCKVAL_SRC_POS);
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358 | m->pMachine->i_setModified(Machine::IsModified_ParallelPorts);
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359 | mlock.release();
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360 |
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361 | return m->pMachine->i_onParallelPortChange(this);
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362 | }
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363 |
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364 | return S_OK;
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365 | }
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366 |
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367 | // public methods only for internal purposes
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368 | ////////////////////////////////////////////////////////////////////////////////
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369 |
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370 | /**
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371 | * Loads settings from the given port node.
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372 | * May be called once right after this object creation.
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373 | *
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374 | * @param data Configuration settings.
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375 | *
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376 | * @note Locks this object for writing.
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377 | */
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378 | HRESULT ParallelPort::i_loadSettings(const settings::ParallelPort &data)
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379 | {
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380 | AutoCaller autoCaller(this);
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381 | AssertComRCReturnRC(autoCaller.rc());
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382 |
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383 | AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
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384 |
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385 | // simply copy
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386 | *m->bd.data() = data;
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387 |
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388 | return S_OK;
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389 | }
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390 |
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391 | /**
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392 | * Saves settings to the given port node.
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393 | *
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394 | * Note that the given Port node is completely empty on input.
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395 | *
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396 | * @param data Configuration settings.
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397 | *
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398 | * @note Locks this object for reading.
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399 | */
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400 | HRESULT ParallelPort::i_saveSettings(settings::ParallelPort &data)
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401 | {
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402 | AutoCaller autoCaller(this);
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403 | AssertComRCReturnRC(autoCaller.rc());
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404 |
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405 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
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406 |
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407 | // simply copy
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408 | data = *m->bd.data();
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409 |
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410 | return S_OK;
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411 | }
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412 |
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413 | /**
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414 | * Returns true if any setter method has modified settings of this instance.
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415 | * @return
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416 | */
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417 | bool ParallelPort::i_isModified()
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418 | {
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419 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
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420 | return m->fModified;
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421 | }
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422 |
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423 | /**
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424 | * @note Locks this object for writing.
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425 | */
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426 | void ParallelPort::i_rollback()
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427 | {
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428 | /* sanity */
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429 | AutoCaller autoCaller(this);
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430 | AssertComRCReturnVoid(autoCaller.rc());
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431 |
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432 | AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
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433 |
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434 | m->bd.rollback();
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435 | }
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436 |
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437 | /**
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438 | * @note Locks this object for writing, together with the peer object (also
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439 | * for writing) if there is one.
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440 | */
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441 | void ParallelPort::i_commit()
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442 | {
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443 | /* sanity */
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444 | AutoCaller autoCaller(this);
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445 | AssertComRCReturnVoid(autoCaller.rc());
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446 |
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447 | /* sanity too */
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448 | AutoCaller peerCaller(m->pPeer);
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449 | AssertComRCReturnVoid(peerCaller.rc());
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450 |
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451 | /* lock both for writing since we modify both (m->pPeer is "master" so locked
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452 | * first) */
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453 | AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS);
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454 |
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455 | if (m->bd.isBackedUp())
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456 | {
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457 | m->bd.commit();
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458 | if (m->pPeer)
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459 | {
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460 | /* attach new data to the peer and reshare it */
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461 | m->pPeer->m->bd.attach(m->bd);
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462 | }
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463 | }
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464 | }
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465 |
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466 | /**
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467 | * @note Locks this object for writing, together with the peer object
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468 | * represented by @a aThat (locked for reading).
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469 | */
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470 | void ParallelPort::i_copyFrom(ParallelPort *aThat)
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471 | {
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472 | AssertReturnVoid(aThat != NULL);
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473 |
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474 | /* sanity */
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475 | AutoCaller autoCaller(this);
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476 | AssertComRCReturnVoid(autoCaller.rc());
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477 |
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478 | /* sanity too */
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479 | AutoCaller thatCaller(aThat);
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480 | AssertComRCReturnVoid(thatCaller.rc());
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481 |
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482 | /* peer is not modified, lock it for reading (aThat is "master" so locked
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483 | * first) */
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484 | AutoReadLock rl(aThat COMMA_LOCKVAL_SRC_POS);
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485 | AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
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486 |
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487 | /* this will back up current data */
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488 | m->bd.assignCopy(aThat->m->bd);
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489 | }
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490 |
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491 | /**
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492 | * Applies the defaults for this parallel port.
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493 | *
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494 | * @note This method currently assumes that the object is in the state after
|
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495 | * calling init(), it does not set defaults from an arbitrary state.
|
---|
496 | */
|
---|
497 | void ParallelPort::i_applyDefaults()
|
---|
498 | {
|
---|
499 | /* sanity */
|
---|
500 | AutoCaller autoCaller(this);
|
---|
501 | AssertComRCReturnVoid(autoCaller.rc());
|
---|
502 |
|
---|
503 | AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
|
---|
504 |
|
---|
505 | /* Set some more defaults based on the slot. */
|
---|
506 | switch (m->bd->ulSlot)
|
---|
507 | {
|
---|
508 | case 0:
|
---|
509 | {
|
---|
510 | m->bd->ulIOBase = 0x378;
|
---|
511 | m->bd->ulIRQ = 7;
|
---|
512 | break;
|
---|
513 | }
|
---|
514 | case 1:
|
---|
515 | {
|
---|
516 | m->bd->ulIOBase = 0x278;
|
---|
517 | m->bd->ulIRQ = 5;
|
---|
518 | break;
|
---|
519 | }
|
---|
520 | default:
|
---|
521 | AssertMsgFailed(("Parallel port slot %u exceeds limit\n", m->bd->ulSlot));
|
---|
522 | break;
|
---|
523 | }
|
---|
524 | }
|
---|
525 |
|
---|
526 | bool ParallelPort::i_hasDefaults()
|
---|
527 | {
|
---|
528 | /* sanity */
|
---|
529 | AutoCaller autoCaller(this);
|
---|
530 | AssertComRCReturn(autoCaller.rc(), true);
|
---|
531 |
|
---|
532 | AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
|
---|
533 |
|
---|
534 | if (!m->bd->fEnabled)
|
---|
535 | {
|
---|
536 | /* Could be default, check the IO base and IRQ. */
|
---|
537 | switch (m->bd->ulSlot)
|
---|
538 | {
|
---|
539 | case 0:
|
---|
540 | if (m->bd->ulIOBase == 0x378 && m->bd->ulIRQ == 7)
|
---|
541 | return true;
|
---|
542 | break;
|
---|
543 | case 1:
|
---|
544 | if (m->bd->ulIOBase == 0x278 && m->bd->ulIRQ == 5)
|
---|
545 | return true;
|
---|
546 | break;
|
---|
547 | default:
|
---|
548 | AssertMsgFailed(("Parallel port slot %u exceeds limit\n", m->bd->ulSlot));
|
---|
549 | break;
|
---|
550 | }
|
---|
551 |
|
---|
552 | /* Detect old-style defaults (0x378, irq 4) in any slot, they are still
|
---|
553 | * in place for many VMs created by old VirtualBox versions. */
|
---|
554 | if (m->bd->ulIOBase == 0x378 && m->bd->ulIRQ == 4)
|
---|
555 | return true;
|
---|
556 | }
|
---|
557 |
|
---|
558 | return false;
|
---|
559 | }
|
---|
560 |
|
---|
561 | /* vi: set tabstop=4 shiftwidth=4 expandtab: */
|
---|