AW: [avr-chat] re-entrant functions

[Stumpf Michael]

:
:developer2112 (sent by Nabble.com) wrote:
:> Are re-entrant functions supported in winavr? If so, how does one go
:> about writing one? Is there some reentrant keyword that will
:cause the
:> compiler to use the stack for passing parameters instead of fixed
:> registers?
:
:Just because registers are used for parameter passing, doesn't make a
:function any less re-entrant. To be re-entrant, just don't
:store persistant
:state in the function such as with static variables.
:

It is compiler dependent.

I remember the Keil C51 compiler to generate non-reentrant code,
because lacal variables were stored in fixed memory locations
rather than on the stack. To make a function reentrant a special keyword
'reentrant' had to be applied to it.

But that was a very special case, no?
Winavr does generate reentrant code with no extra effort.

Recursive functions are only one kind of reentrant functions

regards, Michael

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