author | jjkang |
Fri, 11 Jun 2010 15:22:09 +0800 | |
changeset 2 | 806186ab5e14 |
parent 1 | 0a7b44b10206 |
permissions | -rw-r--r-- |
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// Copyright (c) 1994-2009 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 the License "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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// e32\euser\us_trp.cpp |
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// |
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// |
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#include "us_std.h" |
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#include "us_data.h" |
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EXPORT_C TTrapHandler::TTrapHandler() |
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/** |
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Default constructor. |
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*/ |
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{} |
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#ifndef __LEAVE_EQUALS_THROW__ |
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EXPORT_C void TTrap::UnTrap() |
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// |
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// Pop the current trap frame |
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// |
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{ |
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TTrapHandler *pH=Exec::PopTrapFrame()->iHandler; |
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if (pH!=NULL) |
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pH->UnTrap(); |
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} |
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#else //__LEAVE_EQUALS_THROW__ |
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EXPORT_C void User::Leave(TInt aReason) |
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/** |
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Leaves the currently executing function, unwinds the call stack, and returns |
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from the most recently entered trap harness. |
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@param aReason The value returned from the most recent call to TRAP or TRAPD. |
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This is known as the reason code and, typically, it gives the |
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reason for the environment or user error causing this leave |
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to occur. |
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@see TRAP |
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@see TRAPD |
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*/ |
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{ |
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#ifdef __USERSIDE_THREAD_DATA__ |
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#ifndef __TOOLS2__ |
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Exec::LeaveStart(); |
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#endif |
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TTrapHandler* pH = GetTrapHandler(); |
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#else |
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TTrapHandler* pH = Exec::LeaveStart(); |
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#endif |
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if (pH) |
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pH->Leave(aReason); // causes things on the cleanup stack to be cleaned up |
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throw XLeaveException(aReason); |
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} |
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#endif // !__LEAVE_EQUALS_THROW__ |
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// Private declaration to prevent def file branching |
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#ifndef __SUPPORT_CPP_EXCEPTIONS__ |
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class XLeaveException |
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{ |
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public: |
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IMPORT_C TInt GetReason() const; |
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}; |
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#endif //__SUPPORT_CPP_EXCEPTIONS__ |
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#if !defined(__LEAVE_EQUALS_THROW__) || !defined(__WINS__) |
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EXPORT_C TInt XLeaveException::GetReason() const |
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{ |
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#ifdef __SUPPORT_CPP_EXCEPTIONS__ |
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#ifndef __TOOLS2__ |
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Exec::LeaveEnd(); |
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#endif |
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return iR; |
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#else // !__SUPPORT_CPP_EXCEPTIONS__ |
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return KErrNone; |
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#endif //__SUPPORT_CPP_EXCEPTIONS__ |
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} |
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#endif // !defined(__LEAVE_EQUALS_THROW__) || !defined(__WINS__) |
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EXPORT_C void User::LeaveNoMemory() |
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/** |
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Leaves with the specific reason code KErrNoMemory. |
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@see KErrNoMemory |
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*/ |
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{ |
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User::Leave(KErrNoMemory); |
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} |
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EXPORT_C TInt User::LeaveIfError(TInt aReason) |
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/** |
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Leaves or returns with a specified reason code. |
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If the reason code is negative the function leaves, and the reason code is |
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returned through the trap harness. |
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If the reason code is zero or positive, the function simply returns with the |
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reason value. |
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@param aReason The reason code. |
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@return If the function returns, the reason code which is either zero or positive. |
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*/ |
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{ |
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if (aReason<0) |
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User::Leave(aReason); |
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return(aReason); |
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} |
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EXPORT_C TAny * User::LeaveIfNull(TAny *aPtr) |
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/** |
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Leaves with the reason code KErrNoMemory, if the specified pointer is NULL. |
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If the pointer is not NULL, the function simply returns with the value of |
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the pointer. |
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@param aPtr The pointer to be tested. |
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@return If the function returns, the value of aPtr. |
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*/ |
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{ |
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if (aPtr==NULL) |
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User::LeaveNoMemory(); |
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return(aPtr); |
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} |
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