cannot step Through critical blocks

Debugging "Through" is really really awesome, except when it causes
your image to lock.

At first I thought it was because I had some DNU ahppening when I
pressed Through, like on the send to #critical:, here:

   |mutex| mutex := Mutex new.
   mutex critical: [ [Object new] do: [:err | ] on: Error ]

but then even after correcting it, it happened again:

    |mutex | mutex := Mutex new.
    mutex critical: [ [Object new ] on: Notification do: [ : noti | ] ]

I love Through, but I have no idea how to fix this..

Hi Chris!

It may be that Mutex has no support for re-entrancy. You can use a Semaphore instead:

| accessProtect |
accessProtect := Semaphore forMutualExclusion.
accessProtect critical: [ [Object new ] on: Notification do: [ : noti | ] ].

Then, step-through works.

Best,
Marcel

Mutexes are reentrant, while Semaphores are not.
I suspect that primitive 187 doesn't know about effectiveProcess.

Levente

On Thu, 7 Apr 2016, marcel.taeumel wrote: