NewLC - CleanupStack::PushL(aActiveScheduler) panics EUser CBase 66 - Comments

Re: CleanupStack::PushL(aActiveScheduler) panics EUser CBase 66

jari — Wed, 13 Feb 2008 12:26:42 +0100

In addition to generating panic the code in the original posting is not leave safe. This is the common pattern that is being used in EXEs:

static void ThreadFunctionL()
    {
    CActiveScheduler* activeScheduler = new (ELeave) CActiveScheduler;
    CleanupStack::PushL(activeScheduler);
    CActiveScheduler::Install(activeScheduler);
    
    // ....................................

    CleanupStack::PopAndDestroy(activeScheduler);
    }

TInt E32Main()
    {
    CTrapCleanup* cleanup = CTrapCleanup::New();
    TInt result = KErrNoMemory;
    if (cleanup)
        {
        TRAP(result, ThreadFunctionL());
        delete cleanup;
        }
    return result;
    }

Re: CleanupStack::PushL(aActiveScheduler) panics EUser CBase 66

Andreas — Wed, 13 Feb 2008 11:27:19 +0100

Have you looked at the panic description from the SDK help?

This panic is raised if an attempt is being made to insert a cleanup item into a position on the cleanup stack reserved for marking the current TRAP nest level. In practice this error occurs if the call to CleanupStack::PushL() happens when there has been no call to TRAP().

CleanupStack::PushL(aActiveScheduler) panics EUser CBase 66

symadept — Wed, 13 Feb 2008 08:22:21 +0100

Hi,

The following code panics EUser CBase 66 in my exe

     CTrapCleanup* cleanup = CTrapCleanup::New();
     CActiveScheduler* scheduler = new (ELeave) CActiveScheduler();
     CleanupStack::PushL(scheduler);  // push scheduler
 
      //..................................
 
     CleanupStack::PopAndDestroy(scheduler);  // pop scheduler        
     delete cleanup;