Xvideo problem & some questions about threads

[Alejandro T. Singer]

PLEASE REMOVE ME FROM YOUR LIST, I'M ON IT BY MISTAKE
THANKS
----- Original Message -----
From: "Shane Harper" <shanegh at optusnet.com.au>
To: <vlc-devel at videolan.org>
Sent: Saturday, May 26, 2001 9:15 AM
Subject: Xvideo problem & some questions about threads


> On Thu, May 03, 2001, Samuel Hocevar wrote:
> > It
> (xvideo output)
> > still doesn't work properly here. From time to time, it
> > doesn't run and gives an unexpected async reply. I suspect there is a
> > race condition somewhere, but I couldn't find the reason, and when run
> > within gdb it doesn't segfault anymore.
>
> Could the problem be that the interface thread and the video output thread
> may try to call (non-reentrant) Xlib functions at approximately the same
> time?
>
> (Perhaps we need to use the XInitThreads, XLockDisplay and XUnlockDisplay
> functions?)
>
>
> Recent versions of vlc seg-fault on my system during initialisation of the
> DVD input module. However, I don't get a seg-fault if I use "mpatrol"
> (mpatrol contains its own versions of malloc, etc which are supposed to
> detect problems with dynamic memory usage).
>
> mpatrol doesn't detect any problems (and yet there is one... _somewhere_).
>
> I'm wondering if the normal dynamic memory allocation/deallocations
> functions on my system (which are used by vlc) are thread-safe. I run
RH7.0
> (which has libc.so.6). Is anyone aware of any systems that vlc may be
> expected to run on that don't have thread-safe memory
> allocation/deallocation functions? (If so, vlc should probably provide
> replacement functions which use mutexes.)
>
>
> Shane.
>