[mythtv] [PATCH] mythfrontend segfault due to NULL thread priv request

[Isaac Richards]

On Thursday 09 September 2004 11:48 pm, Frank Riley wrote:
> This bug is not fixed. The problem is there is no synchronization between
> the video thread and the thread that handles the priv requests. The video
> thread that gets placed on the priv request queue is created on the stack
> in NuppelVideoPlayer::StartPlaying(). If StartPlaying() finishs (i.e. the
> video is done playing) before the priv request thread gets around to
> handling the request on the queue, pthread_setschedparam blows up because
> the thread pointer it has is now pointing into la-la land. This is easily
> reproducible (at least on my box) by going to the delete recordings screen
> and quickly scrolling through the recordings until it blows up (as long as
> the preview window is turned on). I'm guessing there is a separate thread
> to change the priority only because we only want to have to set
> mythfrontend as setuid. Is that correct?

Yup, and your assessment of the issue is also 100% correct.  I'm probably 
going to end up disabling the priority thread temporarily for the release, 
then fix it afterwards..  

Isaac