author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 02:02:59 +0200 | |
changeset 0 | c9bc50fca66e |
child 29 | 59aa7d6e3e0f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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#include "BreakController.h" |
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#include "CdcAcmClass.h" |
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#include "AcmUtils.h" |
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#include "HostPushedChangeObserver.h" |
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#include "AcmPanic.h" |
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#include "BreakObserver.h" |
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#include <usb/usblogger.h> |
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#ifdef __FLOG_ACTIVE |
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_LIT8(KLogComponent, "ECACM"); |
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#endif |
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CBreakController::CBreakController(CCdcAcmClass& aParentAcm) |
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/** |
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* Constructor. |
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* |
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* @param aParentAcm Observer. |
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*/ |
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: CActive(CActive::EPriorityStandard), |
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iBreakState(EInactive), |
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iParentAcm(aParentAcm) |
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{ |
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CActiveScheduler::Add(this); |
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|
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// now populate the state machine that manages the transfers between |
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// the declared state values of TBreakState. |
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TInt oldBS; |
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TInt newBS; |
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|
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for ( oldBS = 0 ; oldBS < ENumStates ; oldBS++ ) |
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{ |
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for ( newBS = 0 ; newBS < ENumStates ; newBS++ ) |
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{ |
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StateDispatcher[oldBS][newBS] = ScInvalid; |
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} |
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} |
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|
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// Note that these state transitions are the simple states of the machine. |
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// Checking which entity is currently in control of the break (if any) is |
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// done elsewhere. |
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// Old State -> New State |
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// | | |
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StateDispatcher[EInactive ][ETiming ] = &ScSetTimer; |
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StateDispatcher[EInactive ][ELocked ] = &ScLocked; |
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|
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StateDispatcher[ETiming ][EInactive ] = &ScInactive; |
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StateDispatcher[ETiming ][ETiming ] = &ScSetTimer; |
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StateDispatcher[ETiming ][ELocked ] = &ScLocked; |
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|
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StateDispatcher[ELocked ][EInactive ] = &ScInactive; |
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StateDispatcher[ELocked ][ETiming ] = &ScSetTimer; |
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} |
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CBreakController* CBreakController::NewL(CCdcAcmClass& aParentAcm) |
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/** |
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* Factory function. |
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* |
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* @param aParentAcm Parent. |
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* @return Ownership of a new CBreakController object. |
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*/ |
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{ |
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LOG_STATIC_FUNC_ENTRY |
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|
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CBreakController* self = new(ELeave) CBreakController(aParentAcm); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CLEANUPSTACK_POP(self); |
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return self; |
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} |
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|
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void CBreakController::ConstructL() |
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/** |
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* 2nd-phase constructor. |
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*/ |
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{ |
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LEAVEIFERRORL(iTimer.CreateLocal()); |
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} |
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CBreakController::~CBreakController() |
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/** |
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* Destructor. |
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*/ |
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{ |
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LOG_FUNC |
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Cancel(); |
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iTimer.Close(); |
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105 |
} |
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106 |
|
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107 |
void CBreakController::RunL() |
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108 |
/** |
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* Called by the active scheduler; handles timer completion. |
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110 |
*/ |
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111 |
{ |
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112 |
LOG_LINE |
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113 |
LOG_FUNC |
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114 |
|
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// check the status to see if the timer has matured, if so go straight |
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// to INACTIVE state (and publish new state) |
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if ( iStatus == KErrNone ) |
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118 |
{ |
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// Use iRequester to turn the break off. This should not fail. |
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TInt err = BreakRequest(iRequester, EInactive); |
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static_cast<void>(err); |
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122 |
__ASSERT_DEBUG(!err, |
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_USB_PANIC(KAcmPanicCat, EPanicInternalError)); |
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124 |
} |
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125 |
} |
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126 |
|
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127 |
void CBreakController::DoCancel() |
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128 |
/** |
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* Called by the framework; handles cancelling the outstanding timer request. |
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130 |
*/ |
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131 |
{ |
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132 |
LOG_FUNC |
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133 |
|
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134 |
iTimer.Cancel(); |
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135 |
} |
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136 |
|
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137 |
TInt CBreakController::BreakRequest(TRequester aRequester, |
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138 |
TState aState, |
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TTimeIntervalMicroSeconds32 aDelay) |
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140 |
/** |
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141 |
* Make a break-related request. |
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142 |
* |
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* @param aRequester The entity requesting the break. |
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* @param aState The request- either a locked break, a timed break, or to |
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145 |
* make the break inactive. |
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146 |
* @param aDelay The time delay, only used for a timed break. |
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* @return Error, for instance if a different entity already owns the break. |
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148 |
*/ |
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149 |
{ |
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150 |
LOG_FUNC |
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151 |
LOGTEXT4(_L8("\taRequester = %d, aState = %d, aDelay = %d"), |
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aRequester, aState, aDelay.Int()); |
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153 |
|
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154 |
// Check the validity of the request. |
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if ( aRequester != iRequester && iRequester != ENone ) |
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156 |
{ |
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157 |
LOGTEXT3(_L8("\t*** %d is in charge- cannot service request " |
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158 |
"from %d- returning KErrInUse"), iRequester, aRequester); |
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159 |
return KErrInUse; |
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160 |
} |
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161 |
|
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162 |
iRequester = aRequester; |
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|
163 |
|
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164 |
StateMachine(aState, aDelay); |
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165 |
|
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166 |
// Reset the owner member if relevant. |
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167 |
if ( aState == EInactive ) |
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168 |
{ |
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169 |
iRequester = ENone; |
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170 |
} |
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|
171 |
|
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172 |
return KErrNone; |
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173 |
} |
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|
174 |
|
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175 |
void CBreakController::StateMachine(TState aBreakState, |
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176 |
TTimeIntervalMicroSeconds32 aDelay) |
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177 |
/** |
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178 |
* The generic BREAK state machine. |
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179 |
* |
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180 |
* @param aBreakState The state to go to now. |
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181 |
* @param aDelay Only used if going to a breaking state, the delay. |
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182 |
*/ |
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183 |
{ |
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184 |
LOG_FUNC |
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185 |
|
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186 |
TBool resultOK = EFalse; |
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187 |
|
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188 |
// Invoke the desired function. |
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189 |
PBFNT pfsDispatch = StateDispatcher[iBreakState][aBreakState]; |
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190 |
__ASSERT_DEBUG(pfsDispatch, |
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191 |
_USB_PANIC(KAcmPanicCat, EPanicInternalError)); |
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192 |
resultOK = ( *pfsDispatch )(this, aDelay); |
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|
193 |
|
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194 |
if ( resultOK ) |
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195 |
{ |
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196 |
LOGTEXT(_L8("\tbreak state dispatcher returned *SUCCESS*")); |
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|
197 |
|
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198 |
// check to see if the state change will need to result |
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199 |
// in a modification to the public state of BREAK which is |
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200 |
// either NO-BREAK == EBreakInactive |
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201 |
// or BREAK-ON == (anything else) |
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202 |
if( ( iBreakState != aBreakState ) |
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203 |
&& ( |
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204 |
( iBreakState == EInactive ) |
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205 |
|| ( aBreakState == EInactive ) |
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|
206 |
) |
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|
207 |
) |
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208 |
{ |
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Publish(aBreakState); |
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} |
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|
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// accept the state change ready for next time |
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iBreakState = aBreakState; |
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} |
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else |
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216 |
{ |
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LOGTEXT(_L8("\tbreak state dispatcher returned *FAILURE*")); |
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} |
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} |
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|
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void CBreakController::Publish(TState aNewState) |
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/** |
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* Pointer-safe method to inform the (USB) Host and the Client of BREAK |
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* changes. |
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* |
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* @param aNewState The next state we're about to go to. |
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*/ |
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{ |
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LOG_FUNC |
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LOGTEXT2(_L8("\taNewState = %d"), aNewState); |
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|
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__ASSERT_DEBUG(aNewState != iBreakState, |
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_USB_PANIC(KAcmPanicCat, EPanicInternalError)); |
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234 |
|
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// send the new BREAK state off to the USB Host |
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// this function is normally used so that ACMCSY can send client |
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// changes to RING, DSR and DCD to the USB Host, however we use |
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// it here to force it to refresh all states together with the |
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// new BREAK state. |
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// TODO: check return value |
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iParentAcm.SendSerialState( |
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iParentAcm.RingState(), |
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iParentAcm.DsrState(), |
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iParentAcm.DcdState()); |
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245 |
|
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// inform the ACM Class client that the BREAK signal has just changed, |
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// this should cause it to be toggled there. |
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if( iParentAcm.BreakCallback() ) |
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{ |
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LOGTEXT(_L8("\tabout to call back break state change")); |
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iParentAcm.BreakCallback()->BreakStateChange(); |
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} |
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253 |
|
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// If we're going to the inactive state, and if the device is interested, |
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// we tell the MBreakObserver (ACM port) that the break has completed. |
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if ( aNewState == EInactive ) |
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257 |
{ |
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LOGTEXT(_L8("\tnew state is break-inactive")); |
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if ( iRequester == EDevice ) |
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260 |
{ |
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LOGTEXT(_L8("\tdevice is interested")); |
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if( iParentAcm.BreakCallback() ) |
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263 |
{ |
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LOGTEXT(_L8("\tabout to call back break completion")); |
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iParentAcm.BreakCallback()->BreakRequestCompleted(); |
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} |
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} |
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268 |
|
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// We just got to break-inactive state. Blank the requester record. |
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iRequester = ENone; |
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} |
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} |
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273 |
|
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/** |
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* +----------------------------------------------+ |
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* | Set of state-machine functions to be used in | |
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* | a two-dimensional dispatcher matrix | |
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* +----------------------------------------------+ |
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*/ |
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280 |
|
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TBool CBreakController::ScInvalid(CBreakController *aThis, |
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TTimeIntervalMicroSeconds32 aDelay) |
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{ |
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LOG_STATIC_FUNC_ENTRY |
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285 |
|
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static_cast<void>(aThis); // remove warning |
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static_cast<void>(aDelay); // remove warning |
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288 |
|
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return( EFalse ); |
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} |
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291 |
|
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TBool CBreakController::ScInactive(CBreakController *aThis, |
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TTimeIntervalMicroSeconds32 aDelay) |
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{ |
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LOG_STATIC_FUNC_ENTRY |
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|
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static_cast<void>(aDelay); // remove warning |
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298 |
|
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// this may have been called while a BREAK is already current, cancel the |
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// timer. |
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aThis->Cancel(); |
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302 |
|
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aThis->iParentAcm.SetBreakActive(EFalse); |
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304 |
|
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return( ETrue ); |
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} |
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307 |
|
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TBool CBreakController::ScSetTimer(CBreakController *aThis, |
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TTimeIntervalMicroSeconds32 aDelay) |
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{ |
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LOG_STATIC_FUNC_ENTRY |
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312 |
|
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// don't try to set any delay if the caller wants something impossible |
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if ( aDelay.Int() <= 0 ) |
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{ |
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return( EFalse ); |
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} |
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|
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aThis->Cancel(); // in case we're already active. |
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|
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aThis->iTimer.After(aThis->iStatus, aDelay); |
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aThis->SetActive(); |
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|
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aThis->iParentAcm.SetBreakActive(ETrue); |
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|
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return( ETrue ); |
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} |
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|
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TBool CBreakController::ScLocked(CBreakController *aThis, |
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TTimeIntervalMicroSeconds32 aDelay) |
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{ |
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LOG_STATIC_FUNC_ENTRY |
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333 |
|
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static_cast<void>(aDelay); // remove warning |
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|
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// this may have been called while a BREAK is already current, so cancel |
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// the timer. |
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aThis->Cancel(); |
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|
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aThis->iParentAcm.SetBreakActive(ETrue); |
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|
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return( ETrue ); |
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} |
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|
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// |
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// End of file |