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1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // DBMS server implementation |
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15 // |
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16 // |
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17 |
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18 #include "SD_STD.H" |
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19 #include "Sd_PlatDep.h" |
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20 |
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21 using namespace DBSC; |
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22 |
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23 //CDbmsActiveScheduler class just exposes the access to |
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24 //CActiveScheduler::Level() method, which is needed to |
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25 //make a decision when to call CDbmsActiveScheduler::Stop(). |
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26 class CDbmsActiveScheduler : public CActiveScheduler |
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27 { |
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28 public: |
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29 inline TInt Level() const |
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30 { |
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31 return CActiveScheduler::Level(); |
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32 } |
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33 }; |
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34 |
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35 /////////////////////// |
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36 // Class CDbsServer |
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37 inline CDbsServer::CDbsServer() : |
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38 CServer2(0, ESharableSessions), |
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39 iSources(iCache), |
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40 iDbPropsFactory(iFs), |
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41 iDriveSpaceCol(iFs) |
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42 { |
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43 DbgPrint1(_L("###CDbsServer::CDbsServer(), Server ProcID=%d\n"), RDbProcess().Id()); |
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44 } |
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45 |
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46 //"iCache.Hold(this,KDbsExitDelay)" statement will put CDbsServer instance in the cache, |
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47 //which ensures that CDbsServer instance will be automatically destroyed if nobody |
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48 //uses it next KDbsExitDelay microseconds. |
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49 CDbsServer* CDbsServer::NewL() |
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50 { |
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51 DbgPrint1(_L("###CDbsServer::NewL(), Server ProcId=%d\n"), RDbProcess().Id()); |
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52 CDbsServer* self= new (ELeave) CDbsServer; |
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53 CleanupStack::PushL(self); |
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54 self->ConstructL(); |
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55 CleanupStack::Pop(self); |
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56 self->iCache.Hold(self, KDbsExitDelay); // the last thing we do here |
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57 //Intentional behaviour, resources freed after timeout only |
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58 //coverity[use_after_free] |
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59 return self; |
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60 } |
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61 |
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62 // |
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63 // 2nd phase construction - ensure the timer and server objects are running |
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64 // |
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65 void CDbsServer::ConstructL() |
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66 { |
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67 DbgPrint1(_L("###CDbsServer::ConstructL(), Server ProcId=%d\n"), RDbProcess().Id()); |
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68 __LEAVE_IF_ERROR(Dll::SetTls(this)); |
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69 StartL(KDbsServerName); |
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70 __LEAVE_IF_ERROR(iFs.Connect()); |
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71 iDbPropsFactory.OpenL(); |
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72 //EDriveZ - Symbian OS ROM drive !?!? |
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73 iDbPropsFactory.GetPrivatePathL(EDriveZ, iFileName); |
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74 iPolicyProxy = CPolicyProxy::NewL(iFs,iFileName); |
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75 User::LeaveIfError(iCache.Open(ECacheSize, ETrue)); // create a timed cache |
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76 } |
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77 |
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78 // |
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79 // Invoked via cache entry expiry (or cleanup) |
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80 // |
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81 CDbsServer::~CDbsServer() |
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82 { |
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83 DbgPrint1(_L("###CDbsServer::~CDbsServer(), Server ProcId=%d\n"), RDbProcess().Id()); |
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84 iDriveSpaceCol.Close(); |
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85 delete iPolicyProxy; |
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86 iDbPropsFactory.Close(); |
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87 iCache.Close(); |
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88 iSources.Close(); |
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89 iFs.Close(); |
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90 //Stop the scheduler if the nesting level > 0. |
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91 //Sometime it happens that more than one thread tries to run the server and you will have |
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92 //CDbmsActiveScheduler::Install() called multiple times. But you have to stop the |
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93 //scheduler only once! |
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94 CDbmsActiveScheduler* scheduler = static_cast <CDbmsActiveScheduler*> (CActiveScheduler::Current()); |
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95 if(scheduler->Level() > 0) |
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96 { |
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97 DbgPrint2(_L("###CDbsServer::~CDbsServer(), stop the scheduler, Server ProcId=%d, scheduler=%x\n"), RDbProcess().Id(), (TInt)scheduler); |
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98 CDbmsActiveScheduler::Stop(); |
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99 } |
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100 } |
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101 |
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102 // |
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103 // Creates a new client session. This should really check the version number. |
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104 // |
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105 CSession2* CDbsServer::NewSessionL(const TVersion& aVersion,const RMessage2&) const |
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106 { |
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107 if(!User::QueryVersionSupported(RDbs::Version(), aVersion)) |
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108 { |
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109 __LEAVE(KErrNotSupported); |
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110 } |
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111 CSession2* session = new (ELeave) CDbsSession; |
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112 iCache.Release(*this); |
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113 return session; |
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114 } |
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115 |
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116 // |
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117 // Returns the instance of the server |
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118 // |
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119 CDbsServer* CDbsServer::Instance() |
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120 { |
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121 return (CDbsServer*)Dll::Tls(); |
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122 } |
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123 |
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124 // |
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125 // initiates exit if the last client is closing |
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126 // |
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127 void CDbsServer::RemoveSession() |
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128 { |
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129 iSessionIter.SetToFirst(); |
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130 iSessionIter++; |
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131 if(iSessionIter++ == 0) |
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132 { |
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133 iCache.Hold(this, KDbsExitDelay); |
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134 } |
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135 } |
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136 |
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137 // |
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138 // Performs all server initialisation, in particular creation of the |
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139 // scheduler and server. |
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140 // Noting has to be leaved in the cleanup stack! |
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141 // Both: DBMS server and the active scheduler will be destroyed |
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142 // later. The active scheduler - in CDbsServer destructor. |
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143 // CDbsServer instance - by iCache instance (RDbCache). |
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144 static void CreateServerL() |
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145 { |
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146 DbgPrint1(_L("###DBMS-CreateServerL(), Server ProcId=%d\n"), RDbProcess().Id()); |
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147 // naming the server thread after the server helps to debug panics |
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148 User::LeaveIfError(User::RenameThread(KDbsServerName)); |
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149 // ensure the server thread has a handle on EDBMS.DLL |
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150 LoadDbmsLibraryL(); |
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151 |
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152 // create and install the active scheduler we need |
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153 CDbmsActiveScheduler* scheduler = new (ELeave) CDbmsActiveScheduler; |
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154 CleanupStack::PushL(scheduler); |
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155 CDbmsActiveScheduler::Install(scheduler); |
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156 |
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157 // create the server |
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158 (void)CDbsServer::NewL(); |
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159 |
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160 CleanupStack::Pop(scheduler); |
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161 |
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162 // Initialisation complete, now signal the client |
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163 RDbProcess::Rendezvous(KErrNone); |
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164 } |
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165 |
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166 // |
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167 // Performs all server initialisation, in particular creation of the |
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168 // scheduler and server and then run the scheduler |
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169 // |
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170 static void RunServerL() |
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171 { |
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172 DbgPrint1(_L("###DBMS-RunServerL(), Server ProcId=%d\n"), RDbProcess().Id()); |
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173 ::CreateServerL(); |
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174 //After successfull creation CreateServerL() call leaves the active scheduler instance |
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175 //and the DBMS server instance in the heap - they will be destroyed later. |
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176 __UHEAP_MARK; |
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177 //Start the scheduler. The execution control is transferred to the curent |
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178 //active scheduler. The statement after "CDbmsActiveScheduler::Start();" will |
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179 //be reached after the stop of active scheduler. |
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180 CDbmsActiveScheduler::Start(); |
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181 __UHEAP_MARKEND; |
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182 } |
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183 |
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184 // |
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185 // Server process entry-point |
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186 // |
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187 EXPORT_C TInt Dbs::Run() |
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188 { |
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189 CTrapCleanup* cleanup = CTrapCleanup::New(); |
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190 TInt err = KErrNoMemory; |
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191 if(cleanup) |
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192 { |
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193 TRAP(err, ::RunServerL()); |
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194 delete cleanup; |
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195 } |
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196 DbgPrint2(_L("###Dbs::Run(), end, Server ProcId=%d, err=%d\n"), RDbProcess().Id(), err); |
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197 return err; |
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198 } |
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199 |
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200 /////////////////////// |
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201 // Client called code |
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202 |
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203 // |
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204 // Starts the DBMS server |
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205 // |
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206 TInt Dbs::Start() |
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207 { |
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208 DbgPrint1(_L("#-#Dbs::Start(), Client ProcId=%d\n"), RDbProcess().Id()); |
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209 RDbProcess server; |
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210 TInt err = ::CreateDbmsProcess(server); |
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211 if(err != KErrNone) |
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212 { |
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213 DbgPrint2(_L("#-#Dbs::Start(), CreateDbmsProcess, Client ProcId=%d, err=%d\n"), RDbProcess().Id(), err); |
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214 return err; |
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215 } |
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216 |
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217 TRequestStatus stat; |
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218 server.Rendezvous(stat); |
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219 if(stat != KRequestPending) |
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220 { |
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221 server.Kill(0); // abort startup |
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222 } |
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223 else |
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224 { |
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225 server.Resume(); // logon OK - start the server |
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226 } |
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227 User::WaitForRequest(stat); // wait for start or death |
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228 |
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229 // we can't use the 'exit reason' if the server panicked as this |
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230 // is the panic 'reason' and may be '0' which cannot be distinguished |
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231 // from KErrNone |
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232 err = (server.ExitType() == EExitPanic) ? KErrGeneral : stat.Int(); |
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233 server.Close(); |
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234 DbgPrint2(_L("#-#Dbs::Start(), end, Client ProcId=%d, err=%d\n"), RDbProcess().Id(), err); |
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235 return err; |
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236 } |
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237 |