Problem with self-managing buffer

[Rotak]

PLEASE FORGET THIS POST...
The problem was located in the debugger, which is not able to handle several running threads of ThRead().

I wrote a file-buffer using Borland C++ 4.x.

The buffer is implemented as a thread, which fills itself automatically.

I implemented a function, called GetChar() which returns the very first char from the buffer and shifts the allocated char-array. It also uses a critical section to avoid reading and writing simultaniously from/into the buffer.

csAccess = TCriticalSection()-Object
szBuffer[] was made as char *szBuffer = (char*)malloc( BUFFSIZE );
iBufferFillState contains the number of bytes in the buffer. It's set by the reading loop.

char __fastcall ThRead::GetChar()
{
    char cReturn;
    int iWalk;

    csAccess->Enter();

    //Store the return value
    cReturn = szBuffer[0];

    //shift the array
    for ( iWalk = 0; iWalk < iBufferFillState - 1;iWalk++)
    {
        szBuffer[iWalk] = szBuffer[iWalk+1];
    }

    iBufferFillState --;

    csAccess->Leave();

    return cReturn;
}

The Problem:

The programm gets stuck when arriving here.

for ( iWalk = 0; iWalk < iBufferFillState - 1;iWalk++)
    {
        szBuffer[iWalk] = szBuffer[iWalk+1];
    }

I don't know why!?! As you can see, there should no conflict happen. The part of the reading loop, which fills the buffer is also protected thru the SAME csAccess-Object.

And hints?

Andi

PS: This also happens, if I use an unallocated int[]. So, the main question is: Am I to stupid to shift an array? :-|