AW: [En-Nut-Discussion] global variable

[Ernst Stippl]

Hi!

I am not sure if I understood your question, but here is what I can offer:

Have a look at the Ethernut Sample program "threads.c":

Insert a variable definition between the "include" and the thread
definition:

#include <sys/thread.h>
#include <sys/timer.h>

int global_var;            // <-- insert here

/*
 * High priority thread.
 */ 

As far as I can see, the variable global_var will be accessible by both
threads, they can read/write it. But you have to invent a set of rules to
make sure access to the variable to done in an orderly fashion. Otherwise
both threads MAY write to the variable and so changes to it could get lost.

regard
ernst 


-----Ursprüngliche Nachricht-----
Von: en-nut-discussion-bounces at egnite.de
[mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von Raul Valle
Gesendet: Samstag, 12. August 2006 03:45
An: en-nut-discussion at egnite.de
Betreff: [En-Nut-Discussion] global variable

hi all , how can i use one variable that is able to work for all threads,
that if i modify its value one one thread , in the other can reflect that
change _______________________________________________
En-Nut-Discussion mailing list
En-Nut-Discussion at egnite.de
http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion



--
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.405 / Virus Database: 268.10.9/417 - Release Date: 11.08.2006



-- 
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.405 / Virus Database: 268.10.9/417 - Release Date: 11.08.2006