yz_nk@[...].com wrote:
>   I create a TCL interp in a thread. And use Tcl_Eval to execute a 
>  script. But I want to exit the thread when I click one button.
>  
>  So I use the Tcl_Trace to set a trace proc and receive the button 
>  message. But I cannot exit the TCL interp normally! In the Tcl_CreateTrace
>  
>  doc, it shows:
>  
>  "There is no way for the /proc/ associated with a call to 
>  *Tcl_CreateTrace* to abort execution of /command/. "
>  
>  I can only kill the thread directlly, but there mybe some memory leaks, 
>  for the interp is not freed with Tcl_InterpDelete.

While there are various ways to kill off the thread, which always has 
indeterministic consequences, what you might be interested in the 
following enhancement proposal:

http://tip.tcl.tk/285

Jeff