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1 /* |
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2 * Copyright (c) 2006 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: Class that is able to pause the execution until the |
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15 * asynchronous call resumes it. Knows how to leave the |
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16 * resumed function with the error code supplied by the |
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17 * resuming asynchronous call |
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18 * |
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19 */ |
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20 |
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21 |
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22 #include "rubydebug.h" |
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23 #include "asyncworker.h" |
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24 |
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25 // async worker panic code |
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26 _LIT( KAsyncWorkerPanic, "AWRK" ); |
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27 |
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28 CAsyncWorker* CAsyncWorker::NewLC() |
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29 { |
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30 CAsyncWorker* self = new (ELeave) CAsyncWorker; |
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31 CleanupStack::PushL( self ); |
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32 return self; |
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33 } |
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34 |
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35 CAsyncWorker* CAsyncWorker::NewL() |
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36 { |
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37 CAsyncWorker* self = CAsyncWorker::NewLC(); |
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38 CleanupStack::Pop( self ); |
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39 return self; |
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40 } |
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41 |
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42 CAsyncWorker::~CAsyncWorker() |
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43 { |
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44 delete iWaiter; // if any |
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45 } |
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46 |
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47 /** |
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48 * Pauses the execution until StopAsyncWaitingL is called |
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49 * Leaves if StopAsyncWaitingL is called with the negative error code |
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50 * @leave KErrNotReady if another waiting is still in progress |
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51 * @leave Leaves with the error code passed to StopAsyncWaitingL |
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52 */ |
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53 void CAsyncWorker::WaitForAsyncCallbackL() |
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54 { |
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55 /** @todo Change to RUBY_ASSERT_ALWAYS */ |
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56 RUBY_DEBUG_BLOCKL( "CAsyncWorker::WaitForAsyncCallbackL" ); |
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57 if( iWaiter ) |
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58 { |
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59 RUBY_ERROR0( "CAsyncWorker::WaitForAsyncCallbackL Already waiting" ); |
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60 } |
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61 |
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62 __ASSERT_ALWAYS( !iWaiter, User::Leave( KErrNotReady ) ); |
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63 iErr = KErrNone; |
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64 iWaiter = new (ELeave) CActiveSchedulerWait; |
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65 iWaiter->Start(); |
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66 delete iWaiter; |
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67 iWaiter = NULL; |
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68 User::LeaveIfError( iErr ); |
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69 } |
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70 |
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71 /** |
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72 * Resumes the process paused by WaitForAsyncCallbackL |
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73 * @param aErr Result code to pass to the |
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74 * WaitForAsyncCallbackL error handling. Note, that |
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75 * WaitForAsyncCallbackL leaves only if aErr is negative |
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76 * @return KErrNotReady if no waiting is in progress. Otherwise KErrNone |
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77 */ |
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78 TInt CAsyncWorker::StopAsyncWaiting( TInt aErr ) |
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79 { |
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80 RUBY_DEBUG1( "CAsyncWorker::StopAsyncWaitingL aErr [%d] ", aErr ); |
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81 iErr = aErr; |
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82 /** @todo Change to RUBY_ASSERT_ALWAYS */ |
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83 if( !iWaiter ) |
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84 { |
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85 RUBY_ERROR0( "CAsyncWorker::WaitForAsyncCallbackL Not waiting" ); |
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86 } |
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87 if( !iWaiter) |
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88 { |
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89 return KErrNotReady; |
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90 } |
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91 |
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92 iWaiter->AsyncStop(); |
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93 return KErrNone; |
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94 } |
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95 |
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96 /** |
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97 * Same as StopAsyncWaiting, but panics with AWRK <error code> instead |
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98 * of returning the error code |
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99 * @see StopAsyncWaiting |
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100 */ |
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101 void CAsyncWorker::StopAsyncWaitingOrPanic( TInt aErr ) |
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102 { |
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103 TInt err = StopAsyncWaiting( aErr ); |
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104 if( err != KErrNone ) |
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105 { |
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106 User::Panic( KAsyncWorkerPanic, err ); |
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107 } |
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108 } |
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109 |
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110 //End of file |