Need help: hook for executing task

[Claudio Scordino <cloud.of.andor@gmail.com>]

Hi all,

I have to develop some real-time code. I need to execute some code *any* time 
the executing task changes.

I already tried to put a hook in the __schedule() function, before the call to 
the context_switch() function. 

However, my code is called two consecutive times with the same prev or the 
same next: seems that between two consecutive calls someone has changed the 
executing task...

Can somebody please tell me where exactly I should put my hook ??

Many thanks,

           Claudio Scordino
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