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1 /* |
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2 * Copyright (c) 2006-2007 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: ?Description |
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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 "ircachecleanup.h" |
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20 #include "ircachemgmt.h" |
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21 #include "irdebug.h" |
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22 |
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23 //Constant decided on the rate of data collection in cache |
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24 /*in a high speed connection*/ |
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25 /* const TUint KConstantForCleanupFrequency = KCacheLimitSize*90; */ |
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26 //maximum time interval = 2147483648/KCacheLimitSize |
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27 |
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28 const TUint KIntervalPerByte =2048 ; |
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29 // |
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30 const TInt KMinCleanupInterval = 2*60*1000000;//2 mins |
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31 const TInt KMaxCleanupInterval = 2147483647;//~36 mins for 1MB data |
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32 |
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33 // --------------------------------------------------------------------------- |
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34 //Two-phased constructor. |
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35 // --------------------------------------------------------------------------- |
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36 // |
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37 CIRCacheCleanup* CIRCacheCleanup::NewL(CIRCacheMgmt& aCacheDb) |
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38 { |
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39 IRLOG_DEBUG( "CIRCacheCleanup::NewL - Entering" ); |
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40 CIRCacheCleanup* self = new(ELeave)CIRCacheCleanup(aCacheDb); |
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41 CleanupStack::PushL(self); |
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42 self->ConstructL(); |
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43 CleanupStack::Pop(self); |
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44 IRLOG_DEBUG( "CIRCacheCleanup::NewL - Exiting" ); |
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45 return self; |
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46 } |
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47 |
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48 // --------------------------------------------------------------------------- |
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49 // Destructor. |
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50 // --------------------------------------------------------------------------- |
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51 // |
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52 CIRCacheCleanup::~CIRCacheCleanup() |
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53 { |
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54 IRLOG_DEBUG( "CIRCacheCleanup::~CIRCacheCleanup - Entering" ); |
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55 Cancel(); |
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56 IRLOG_DEBUG( "CIRCacheCleanup::~CIRCacheCleanup - Exiting" ); |
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57 } |
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58 |
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59 // --------------------------------------------------------------------------- |
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60 //Default Constructor |
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61 // --------------------------------------------------------------------------- |
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62 // |
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63 CIRCacheCleanup::CIRCacheCleanup(CIRCacheMgmt& aCacheDb): |
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64 CTimer( CActive::EPriorityLow ), iDatabase( aCacheDb ) |
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65 { |
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66 IRLOG_DEBUG( "CIRCacheCleanup::CIRCacheCleanup - Entering" ); |
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67 CActiveScheduler::Add( this ); |
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68 IRLOG_DEBUG( "CIRCacheCleanup::CIRCacheCleanup - Exiting" ); |
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69 } |
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70 |
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71 // --------------------------------------------------------------------------- |
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72 //Second-phase constructor. |
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73 // --------------------------------------------------------------------------- |
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74 // |
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75 void CIRCacheCleanup::ConstructL() |
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76 { |
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77 IRLOG_DEBUG( "CIRCacheCleanup::ConstructL - Entering" ); |
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78 CTimer::ConstructL(); |
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79 CheckStatusL(); |
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80 IRLOG_DEBUG( "CIRCacheCleanup::ConstructL - Exiting" ); |
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81 } |
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82 |
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83 // --------------------------------------------------------------------------- |
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84 //Cleanup CacheDb if necessary |
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85 // --------------------------------------------------------------------------- |
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86 // |
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87 void CIRCacheCleanup::CleanupCacheDbL() |
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88 { |
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89 IRLOG_DEBUG( "CIRCacheCleanup::CleanupCacheDbL - Entering" ); |
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90 iDatabase.CheckSizeL(); |
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91 IRLOG_DEBUG( "CIRCacheCleanup::CleanupCacheDbL - Exiting" ); |
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92 } |
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93 |
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94 // --------------------------------------------------------------------------- |
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95 //CheckStatus of CacheDb and do cleanup if necessary |
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96 // --------------------------------------------------------------------------- |
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97 // |
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98 void CIRCacheCleanup::CheckStatusL() |
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99 { |
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100 IRLOG_DEBUG( "CIRCacheCleanup::CheckStatusL - Entering" ); |
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101 TTimeIntervalMicroSeconds32 interval(GetCleanupInterval()); |
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102 After(interval); |
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103 CleanupCacheDbL(); |
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104 IRLOG_DEBUG( "CIRCacheCleanup::CheckStatusL - Exiting" ); |
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105 } |
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106 |
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107 // --------------------------------------------------------------------------- |
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108 // CIRCacheCleanup::RunL(). |
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109 // --------------------------------------------------------------------------- |
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110 // |
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111 void CIRCacheCleanup::RunL() |
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112 { |
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113 IRLOG_DEBUG( "CIRCacheCleanup::RunL - Entering" ); |
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114 CheckStatusL(); |
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115 IRLOG_DEBUG( "CIRCacheCleanup::RunL - Exiting" ); |
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116 } |
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117 |
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118 // --------------------------------------------------------------------------- |
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119 // CIRCacheCleanup::GetCleanupInterval(). |
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120 // --------------------------------------------------------------------------- |
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121 // |
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122 TUint32 CIRCacheCleanup::GetCleanupInterval() |
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123 { |
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124 IRLOG_DEBUG( "CIRCacheCleanup::GetCleanupInterval - Entering" ); |
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125 //formula derivation: |
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126 //Timeinterval of cleanup (T) is inversely proportional to the cache size(S) |
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127 //Minimum time interval for cleanup routine 2 min. |
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128 //Maximum time interval for cleanup routine ~35mins. |
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129 //timeintervalperbyte = (35-2)*60*1000000/1024*1024 |
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130 //TimeInterval = timeintervalperbyte*(MaxCacheLimit-CurrentCachesize) |
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131 |
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132 TInt interval =KIntervalPerByte * (KCacheLimitSize - iDatabase.CacheSize()); |
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133 //keep the value range bound |
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134 interval = Max(interval,KMinCleanupInterval); |
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135 interval = Min(interval,KMaxCleanupInterval); |
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136 IRLOG_DEBUG( "CIRCacheCleanup::GetCleanupInterval - Exiting" ); |
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137 return interval; |
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138 } |