[Xcb] Nested XLockDisplay

[Jeremy A. Kolb]

Hi Elias,

What version of the X11 server and libraries is the user using?  As far as 
I know all of the known LockDisplay/UnlockDisplay issues have been 
resolved in the latest versions.

Jeremy

On Tue, 2 Jan 2007, Elias Naur wrote:

> Hi,
> 
> Sorry if this is trivial or have been addressed before, but my
> searching failed to bring up anything conclusive. My problem is the
> LockDisplay/UnlockDisplay assertion failures in the xlib-on-xcb
> library. I've got a LWJGL (http://lwjgl.org) user that complains that
> the "xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed."
> occurs with aany test program. This is a java based library, but I
> haven't yet tried to find out if the Sun java implementation or the
> LWJGL library is at fault. As far as I can tell, the assertion means
> that XLockDisplay has been called while the lock was already held.
> However, the xlib manual at
> http://tronche.com/gui/x/xlib/display/XLockDisplay.html states that
> "Nested calls to XLockDisplay() work correctly; the display will not
> actually be unlocked until XUnlockDisplay() has been called the same
> number of times as XLockDisplay()". Have I misunderstood something or
> has the spec changed with xlib-on-xcb to disallow nested XLockDisplay
> (I can understand the other common assertion failure that occurs when
> XUnlockDisplay is called without holding the lock)?
> 
>  - elias
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