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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Symbian application wrapper of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <e32std.h>
#include <qglobal.h>
#ifdef QT_EXPORTS_NOT_FROZEN
// If exports in Qt DLLs are not frozen in this build, then we have to pick up the
// allocator creation function by import link. We know the function will be present
// in the DLLs we test with, as we have to use the DLLs we have built.
struct SStdEpocThreadCreateInfo;
Q_CORE_EXPORT TInt qt_symbian_SetupThreadHeap(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo);
/* \internal
*
* Uses link-time symbol preemption to capture a call from the application
* startup. On return, there is some kind of heap allocator installed on the
* thread.
*/
TInt UserHeap::SetupThreadHeap(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo)
{
return qt_symbian_SetupThreadHeap(aNotFirst, aInfo);
}
#else // QT_EXPORTS_NOT_FROZEN
// If we are using an export frozen build, it should be compatible with all 4.7.x Qt releases.
// We want to use the allocator creation function introduced in qtcore.dll after 4.7.1. But we
// can't import link to it, as it may not be present in whatever 4.7.x DLLs we are running with.
// So the function is found and called dynamically, by library lookup. If it is not found, we
// use the OS allocator creation functions instead.
struct SThreadCreateInfo
{
TAny* iHandle;
TInt iType;
TThreadFunction iFunction;
TAny* iPtr;
TAny* iSupervisorStack;
TInt iSupervisorStackSize;
TAny* iUserStack;
TInt iUserStackSize;
TInt iInitialThreadPriority;
TPtrC iName;
TInt iTotalSize; // Size including any extras (must be a multiple of 8 bytes)
};
struct SStdEpocThreadCreateInfo : public SThreadCreateInfo
{
RAllocator* iAllocator;
TInt iHeapInitialSize;
TInt iHeapMaxSize;
TInt iPadding; // Make structure size a multiple of 8 bytes
};
/* \internal
*
* Uses link-time symbol preemption to capture a call from the application
* startup. On return, there is some kind of heap allocator installed on the
* thread.
*/
TInt UserHeap::SetupThreadHeap(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo)
{
TInt r = KErrNone;
#ifndef __WINS__
// attempt to create the fast allocator through a known export ordinal in qtcore.dll
RLibrary qtcore;
if (qtcore.Load(_L("qtcore.dll")) == KErrNone)
{
const int qt_symbian_SetupThreadHeap_eabi_ordinal = 3713;
TLibraryFunction libFunc = qtcore.Lookup(qt_symbian_SetupThreadHeap_eabi_ordinal);
if (libFunc)
{
typedef int (*TSetupThreadHeapFunc)(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo);
TSetupThreadHeapFunc p_qt_symbian_SetupThreadHeap = TSetupThreadHeapFunc(libFunc);
r = (*p_qt_symbian_SetupThreadHeap)(aNotFirst, aInfo);
}
qtcore.Close();
if (libFunc)
return r;
}
#endif
// no fast allocator support - use default allocator creation
if (!aInfo.iAllocator && aInfo.iHeapInitialSize>0)
{
// new heap required
RHeap* pH = NULL;
r = UserHeap::CreateThreadHeap(aInfo, pH);
}
else if (aInfo.iAllocator)
{
// sharing a heap
RAllocator* pA = aInfo.iAllocator;
pA->Open();
User::SwitchAllocator(pA);
r = KErrNone;
}
return r;
}
#endif // QT_EXPORTS_NOT_FROZEN
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