atomic section in code

Diez B. Roggisch deets at nospam.web.de
Sun Sep 7 16:53:15 CEST 2008


Hendrik van Rooyen schrieb:
> Fredrik Lundh <fredr...ware.com> wrote:
> 
>> sounds like he wants/needs non-cooperative, mandatory locking.
> 
> Could one get there using ctypes to disable interrupts?

Not as such, ctypes can't execute arbitrary machine code. But of course 
you can create a C-lib that does what you want (IF it can be done, that 
is..), and wrap that.

> Cross Platform?

Certainly not.

> I can think of lots of hassles, starting with permissions
> to use the privileged instructions.


I don't think there is a chance for this without major system tinkering. 
Under Linux, you could create a real time thread so highly prioritized 
that it won't yield any time to any other scheduler. And in a 
kernel-module, you can call cli (or whatever the needed call is). But 
this will most probably break your system.

diez



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