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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: Client for Events Handler 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 "evthandlerclientserver.h" |
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20 #include "evthandlerclient.h" |
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21 #include "evthandlerserverconsts.h" |
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22 #include "evtdebug.h" |
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23 |
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24 // ---------------------------------------------------------------------------- |
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25 // StartServer() |
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26 // ---------------------------------------------------------------------------- |
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27 // |
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28 static TInt StartServer() |
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29 /* |
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30 * Start the server process. Simultaneous launching |
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31 * of two such processes should be detected when the second one attempts to |
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32 * create the server object, failing with KErrAlreadyExists. |
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33 */ |
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34 { |
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35 EVTUIDEBUG("+ StartServer()"); |
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36 const TUidType serverUid( KNullUid, KNullUid, KServerUid3); |
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37 RProcess server; |
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38 TInt r = server.Create( KEvtHandlerServerImg, KNullDesC, serverUid ); |
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39 if (r != KErrNone) |
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40 return r; |
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41 TRequestStatus stat; |
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42 server.Rendezvous(stat); |
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43 if (stat != KRequestPending) |
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44 server.Kill( 0 ); // abort startup |
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45 else |
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46 server.Resume(); // logon OK - start the server |
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47 User::WaitForRequest( stat ); // wait for start or death |
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48 // we can't use the 'exit reason' if the server panicked as this |
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49 // is the panic 'reason' and may be '0' which cannot be distinguished |
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50 // from KErrNone |
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51 r = ( server.ExitType() == EExitPanic ) ? KErrGeneral : stat.Int(); |
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52 server.Close(); |
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53 EVTUIDEBUG("- StartServer()"); |
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54 return r; |
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55 } |
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56 |
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57 // ---------------------------------------------------------------------------- |
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58 // REvtHandlerSession::Connect() |
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59 // ---------------------------------------------------------------------------- |
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60 // |
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61 EXPORT_C TInt REvtHandlerSession::Connect() |
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62 /* |
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63 * Connect to the server, attempting to start it if necessary |
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64 */ |
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65 { |
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66 EVTUIDEBUG("+ REvtHandlerSession::Connect()"); |
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67 TInt retry = 2; |
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68 for (;;) |
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69 { |
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70 TInt r = CreateSession( KEvtHandlerServerName, TVersion( 0, 0, 0), 1 ); |
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71 if ( r != KErrNotFound && r != KErrServerTerminated ) |
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72 return r; |
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73 |
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74 if ( --retry == 0 ) |
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75 return r; |
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76 |
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77 r = StartServer(); |
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78 if ( r !=KErrNone && r != KErrAlreadyExists ) |
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79 return r; |
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80 } |
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81 } |
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82 |
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83 // ---------------------------------------------------------------------------- |
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84 // REvtHandlerSession::SendEventId() |
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85 // ---------------------------------------------------------------------------- |
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86 // |
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87 EXPORT_C TInt REvtHandlerSession::SendEventId( const TDesC& aMessage, const TInt aAccuracy ) |
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88 { |
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89 EVTUIDEBUG("+ REvtHandlerSession::SendEventId()"); |
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90 |
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91 if ( aMessage.Length() > KMaxEvtHandlerMessage ) |
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92 return KErrArgument; |
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93 return SendReceive( ESendEventId, TIpcArgs( &aMessage, aAccuracy ) ); |
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94 } |