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1 /* |
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2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: start the server |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include "imcacheprocessstarter.h" |
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20 // logs |
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21 #include "imcachedebugtrace.h" |
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22 // system includes |
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23 #include <e32std.h> |
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24 #include <f32file.h> |
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25 |
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26 |
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27 // CONSTANTS |
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28 _LIT( KEka2ExeDir,"\\sys\\bin\\"); |
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29 _LIT( KEka2LaunchMutexExt, "[lMtx]" ); |
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30 const TInt KEka2SrvConnTries = 7; |
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31 const TInt KEka2SrvConnInitialRetryWait = 500; //MicroSeconds => 0.0005s |
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32 |
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33 |
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34 // ============================================================== |
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35 // ====================== HELPER CLASS ========================== |
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36 // ============================================================== |
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37 |
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38 /** |
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39 * RSessionBase accessor to give to the ProcessStarter |
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40 * access to RSessionBase::CreateSession(). |
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41 */ |
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42 class REka2SessionBaseAccessor : public RSessionBase |
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43 { |
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44 public: // Constructor |
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45 inline REka2SessionBaseAccessor() |
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46 { |
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47 } |
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48 |
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49 public: // New functions |
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50 |
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51 /** |
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52 * Public access to RSessionBase::CreateSession(). |
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53 */ |
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54 inline TInt CreateSession( const TDesC& aServer, |
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55 const TVersion& aVersion, |
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56 TInt aAsyncMessageSlots ) |
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57 { |
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58 return RSessionBase::CreateSession( aServer, |
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59 aVersion, |
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60 aAsyncMessageSlots ); |
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61 } |
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62 }; |
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63 |
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64 |
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65 // ============================================================== |
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66 // ====================== PROCESSSTARTER ======================== |
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67 // ============================================================== |
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68 |
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69 // -------------------------------------------------------------- |
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70 // IMCacheProcessStarter::FullExePathForClientLocation() |
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71 // -------------------------------------------------------------- |
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72 // |
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73 void IMCacheProcessStarter::FullExePathForClientLocation( |
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74 const TDesC& aExeName, |
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75 TFileName& aFullExePath ) |
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76 { |
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77 TRACE( T_LIT("IMCacheProcessStarter::FullExePathForClientLocation begin") ); |
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78 //Get drive (C:) where this client code is installed |
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79 { |
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80 TFileName tmp; |
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81 Dll::FileName( tmp ); |
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82 aFullExePath.Copy( TParsePtrC( tmp ).Drive() ); |
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83 } |
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84 |
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85 //Build the rest from the exe path |
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86 aFullExePath.Append( KEka2ExeDir ); |
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87 aFullExePath.Append( aExeName ); |
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88 TRACE( T_LIT("IMCacheProcessStarter::FullExePathForClientLocation end") ); |
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89 } |
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90 |
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91 // -------------------------------------------------------------- |
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92 // IMCacheProcessStarter::StartInstance() |
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93 // -------------------------------------------------------------- |
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94 // |
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95 TInt IMCacheProcessStarter::StartInstance( |
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96 const TDesC& aFullExePath, |
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97 const TDesC& aCommand ) |
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98 { |
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99 TRACE( T_LIT("IMCacheProcessStarter::StartInstance begin") ); |
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100 RMutex launchMutex; |
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101 TInt error = KErrNotFound; |
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102 |
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103 { |
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104 // Dynamic mutex name used to allow code share |
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105 TName launchMutexName( TParsePtrC( aFullExePath ).Name() ); |
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106 launchMutexName.Append( KEka2LaunchMutexExt ); |
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107 |
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108 // Open or Create mutex to serialize to access to server startup code. |
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109 // (race condition safe way) |
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110 while( error == KErrNotFound ) |
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111 { |
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112 error = launchMutex.CreateGlobal( launchMutexName ); |
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113 if( error != KErrAlreadyExists ) |
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114 { |
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115 break; |
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116 } |
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117 error = launchMutex.OpenGlobal( launchMutexName ); |
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118 } |
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119 |
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120 if( error != KErrNone ) |
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121 { |
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122 TRACE( T_LIT("IMCacheProcessStarter::StartInstance end") ); |
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123 return error; |
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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 launchMutex.Wait(); |
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129 |
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130 //Serialized access |
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131 error = IMCacheProcessStarter::DoStartInstance( aFullExePath, |
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132 aCommand ); |
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133 |
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134 launchMutex.Signal(); |
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135 launchMutex.Close(); |
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136 TRACE( T_LIT("IMCacheProcessStarter::StartInstance end") ); |
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137 return error; |
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138 } |
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139 |
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140 // -------------------------------------------------------------- |
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141 // IMCacheProcessStarter::ConnectToServer() |
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142 // -------------------------------------------------------------- |
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143 // |
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144 TInt IMCacheProcessStarter::ConnectToServer( |
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145 const TDesC& aFullExePath, |
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146 const TDesC& aCommand, |
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147 RSessionBase& aSessionToConnect, |
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148 const TDesC& aServerName, |
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149 const TVersion& aClientVersion, |
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150 TInt aAsyncMessageSlots ) |
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151 { |
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152 TRACE( T_LIT("IMCacheProcessStarter::ConnectToServer begin") ); |
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153 if( aSessionToConnect.Handle() != KNullHandle ) |
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154 { |
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155 return KErrInUse; |
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156 } |
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157 |
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158 TInt err = KErrNone; |
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159 TInt startupWait = KEka2SrvConnInitialRetryWait; |
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160 |
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161 //Server connect and launch loop |
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162 for( TInt trie = 0 ; trie < KEka2SrvConnTries ; trie++ ) |
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163 { |
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164 REka2SessionBaseAccessor acc; |
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165 err = acc.CreateSession( aServerName, |
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166 aClientVersion, |
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167 aAsyncMessageSlots ); |
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168 |
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169 if( err == KErrNone ) |
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170 { |
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171 //session ownership is now on client |
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172 aSessionToConnect = acc; |
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173 return KErrNone; |
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174 } |
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175 |
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176 else if( ( err == KErrNotFound ) || |
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177 ( err == KErrServerTerminated ) ) |
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178 { |
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179 //Server missing or died when connecting |
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180 //Start a new server |
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181 err = IMCacheProcessStarter::StartInstance( aFullExePath, |
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182 aCommand ); |
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183 |
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184 //If process exist already, then all is fine |
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185 //(some other process started it between the origical connect and launch trie) |
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186 if( err == KErrAlreadyExists ) |
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187 { |
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188 err = KErrNone; |
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189 } |
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190 |
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191 //If server process start failed, bail out. |
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192 if( err != KErrNone ) |
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193 { |
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194 return err; |
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195 } |
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196 |
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197 //If this is 2nd or subsequent try, |
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198 //give some time for server to startup |
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199 if( trie > 0 ) |
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200 { |
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201 // Code scanner warning : Use of User::After (id:92) |
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202 // it is required to be used here |
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203 User::After( startupWait ); // CSI: 92 # See above |
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204 startupWait = 2 * startupWait; |
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205 } |
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206 } |
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207 |
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208 else |
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209 { |
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210 //Server process start failed. Bail out. |
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211 return err; |
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212 } |
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213 } |
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214 TRACE( T_LIT("IMCacheProcessStarter::ConnectToServer end") ); |
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215 return err; |
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216 } |
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217 |
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218 // -------------------------------------------------------------- |
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219 // IMCacheProcessStarter::DoStartServerInstance() |
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220 // -------------------------------------------------------------- |
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221 // |
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222 TInt IMCacheProcessStarter::DoStartInstance( |
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223 const TDesC& aFullExePath, |
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224 const TDesC& aCommand ) |
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225 { |
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226 TRACE( T_LIT("IMCacheProcessStarter::DoStartInstance begin") ); |
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227 TInt error = KErrNone; |
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228 |
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229 //Create process |
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230 RProcess process; |
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231 error = process.Create( aFullExePath, aCommand ); |
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232 |
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233 if( error == KErrNone ) |
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234 { |
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235 |
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236 TRequestStatus rendezvousStatus; |
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237 process.Rendezvous( rendezvousStatus ); |
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238 |
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239 process.Resume(); |
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240 // Codescanner warning: user of User::WaitForRequest (Id:94) |
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241 // it is required to use at server startup |
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242 User::WaitForRequest( rendezvousStatus ); // CSI: 94 # See above |
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243 error = rendezvousStatus.Int(); |
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244 |
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245 if( process.ExitType() != EExitPending ) |
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246 { |
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247 //Something failed in server startup |
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248 //Force the error code to be always something |
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249 //else than KErrNone |
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250 if( error == KErrNone ) |
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251 { |
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252 error = KErrServerTerminated; |
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253 } |
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254 } |
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255 |
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256 } |
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257 |
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258 process.Close(); |
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259 TRACE( T_LIT("IMCacheProcessStarter::DoStartInstance end") ); |
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260 return error; |
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261 } |
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262 |
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263 // END OF FILE |
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264 |
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265 |
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266 |