[wdmaudiodev] Re: Bug in MSVAD sample, or misunderstanding?
- From: Chun-Yu <cshei@xxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Sat, 5 Oct 2002 17:55:09 -0500 (EST)
Ah, but from the MSDN Library - "If memblock is NULL, the pointer is
ignored and free immediately returns."
So it doesn't hurt to call free on a NULL pointer - it just won't do
anything.
Chun-Yu
On Sat, 5 Oct 2002, Chris Edgington wrote:
>
> In the msvad sample in the XP DDK, in basedma.cpp, the following code
> exists for the FreeBuffer method:
>
> if ( m_pvDmaBuffer )
> {
> ExFreePool( m_pvDmaBuffer );
> m_ulDmaBufferSize = 0;
> }
>
> Am I missing something, or should m_pvDmaBuffer be set to NULL after the
> free? This has the potential of being called to free a NULL pointer,
> right?
>
> Thanks,
> -Chris
>
> ******************
>
> WDMAUDIODEV addresses:
> Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
> Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
> Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
> Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx
>
> URL to WDMAUDIODEV page:
> http://www.wdmaudiodev.de/
>
>
>
******************
WDMAUDIODEV addresses:
Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx
URL to WDMAUDIODEV page:
http://www.wdmaudiodev.de/
Other related posts:
