[Beepcore-c-users] race condition

[Lei Z. <lz...@ju...>]

Just tripped over another beepcore-c problem: race condition at session 
shutdown time.  I'm gonna use null-profile.c to explain the problem:

In null-profile.c:
pro_frame_available ()
{
1.    f = bpc_query_frame(...)

2.    /* do fancy processing */

3.    bpc_frame_destroy();
}

In 2. a RPY can be sent to acknowlege a MSG; now the channel 0 thread 
takes over and destroys the null-profile channel instance (because the 
channel is considered QUIESCENT); now back to the above 3, bummer!! core 
dump on GET_WRAPPER(inst->conn) then grabbing wrap->core_lock!

I'm now just working around this by doing bpc_frame_destroy() before 
sending RPY.  Any better/real fix?

Thanks,
Lei

William J. Mills wrote:

>Fair enough. :)
>