initial import

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notaz 2006-12-19 20:53:21 +00:00
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/*******************************************************************
*
* File: PolledAS.cpp
*
* Author: Peter van Sebille (peter@yipton.net)
*
* (c) Copyright 2002, Peter van Sebille
* All Rights Reserved
*
*******************************************************************/
/*
* Oh Lord, forgive me for I have sinned.
* In their infinite wisdom, Symbian Engineers have decided that
* the Active Scheduler's queue of Active Objects is private
* and no getters are provided... sigh.
* This mere mortal will have to excercise the power of C pre-processor
* once more to circumvent the will of the gods.
*/
#include <e32std.h>
// from e32base.h
class CBase
{
public:
IMPORT_C virtual ~CBase();
inline TAny* operator new(TUint aSize,TAny *aBase) {Mem::FillZ(aBase,aSize);return(aBase);}
IMPORT_C TAny* operator new(TUint aSize);
inline TAny* operator new(TUint aSize, TLeave) {return newL(aSize);}
IMPORT_C TAny* operator new(TUint aSize,TUint anExtraSize);
protected:
IMPORT_C CBase();
private:
CBase(const CBase&);
CBase& operator=(const CBase&);
IMPORT_C static TAny* newL(TUint aSize);
};
class CActive : public CBase
{
public:
enum TPriority
{
EPriorityIdle=-100,
EPriorityLow=-20,
EPriorityStandard=0,
EPriorityUserInput=10,
EPriorityHigh=20,
};
public:
IMPORT_C ~CActive();
IMPORT_C void Cancel();
IMPORT_C void Deque();
IMPORT_C void SetPriority(TInt aPriority);
inline TBool IsActive() const {return(iActive);}
inline TBool IsAdded() const {return(iLink.iNext!=NULL);}
inline TInt Priority() const {return iLink.iPriority;}
protected:
IMPORT_C CActive(TInt aPriority);
IMPORT_C void SetActive();
// Pure virtual
virtual void DoCancel() =0;
virtual void RunL() =0;
IMPORT_C virtual TInt RunError(TInt aError);
public:
TRequestStatus iStatus;
private:
TBool iActive;
TPriQueLink iLink;
friend class CActiveScheduler;
// friend class CServer;
friend class CPrivatePolledActiveScheduler; // added
};
//
class CActiveScheduler : public CBase
{
public:
IMPORT_C CActiveScheduler();
IMPORT_C ~CActiveScheduler();
IMPORT_C static void Install(CActiveScheduler* aScheduler);
IMPORT_C static CActiveScheduler* Current();
IMPORT_C static void Add(CActive* anActive);
IMPORT_C static void Start();
IMPORT_C static void Stop();
IMPORT_C static TBool RunIfReady(TInt& aError, TInt aMinimumPriority);
IMPORT_C static CActiveScheduler* Replace(CActiveScheduler* aNewActiveScheduler);
IMPORT_C virtual void WaitForAnyRequest();
IMPORT_C virtual void Error(TInt anError) const;
private:
void DoStart();
IMPORT_C virtual void OnStarting();
IMPORT_C virtual void OnStopping();
IMPORT_C virtual void Reserved_1();
IMPORT_C virtual void Reserved_2();
friend class CPrivatePolledActiveScheduler; // added
protected:
inline TInt Level() const;
private:
TInt iLevel;
TPriQue<CActive> iActiveQ;
};
class TCleanupItem;
class CleanupStack
{
public:
IMPORT_C static void PushL(TAny* aPtr);
IMPORT_C static void PushL(CBase* aPtr);
IMPORT_C static void PushL(TCleanupItem anItem);
IMPORT_C static void Pop();
IMPORT_C static void Pop(TInt aCount);
IMPORT_C static void PopAndDestroy();
IMPORT_C static void PopAndDestroy(TInt aCount);
IMPORT_C static void Check(TAny* aExpectedItem);
inline static void Pop(TAny* aExpectedItem);
inline static void Pop(TInt aCount, TAny* aLastExpectedItem);
inline static void PopAndDestroy(TAny* aExpectedItem);
inline static void PopAndDestroy(TInt aCount, TAny* aLastExpectedItem);
};
/*
* This will declare CPrivatePolledActiveScheduler as a friend
* of all classes that define a friend. CPrivatePolledActiveScheduler needs to
* be a friend of CActive
*/
//#define friend friend class CPrivatePolledActiveScheduler; friend
/*
* This will change the:
* void DoStart();
* method in CActiveScheduler to:
* void DoStart(); friend class CPrivatePolledActiveScheduler;
* We need this to access the private datamembers in CActiveScheduler.
*/
//#define DoStart() DoStart(); friend class CPrivatePolledActiveScheduler;
//#include <e32base.h>
#include "PolledAS.h"
class CPrivatePolledActiveScheduler : public CActiveScheduler
{
public:
void Schedule();
};
void CPrivatePolledActiveScheduler::Schedule()
{
TDblQueIter<CActive> q(iActiveQ);
q.SetToFirst();
FOREVER
{
CActive *pR=q++;
if (pR)
{
if (pR->IsActive() && pR->iStatus!=KRequestPending)
{
pR->iActive=EFalse;
TRAPD(r,pR->RunL());
break;
}
}
else
break;
}
}
CPolledActiveScheduler::~CPolledActiveScheduler()
{
delete iPrivatePolledActiveScheduler;
}
//static CPolledActiveScheduler* sPolledActiveScheduler = NULL;
CPolledActiveScheduler* CPolledActiveScheduler::NewL()
{
//sPolledActiveScheduler =
CPolledActiveScheduler* self = new(ELeave)CPolledActiveScheduler;
CleanupStack::PushL(self);
self->ConstructL();
CleanupStack::Pop();
return self;
}
void CPolledActiveScheduler::ConstructL()
{
iPrivatePolledActiveScheduler = new(ELeave) CPrivatePolledActiveScheduler;
iPrivatePolledActiveScheduler->Install(iPrivatePolledActiveScheduler);
}
void CPolledActiveScheduler::Schedule()
{
iPrivatePolledActiveScheduler->Schedule();
}
/*
CPolledActiveScheduler* CPolledActiveScheduler::Instance()
{
// return (CPolledActiveScheduler*) CActiveScheduler::Current();
return sPolledActiveScheduler;
}
*/