Correct threads hanging situation on SMP architecture

[Christophe Coutand]

Hi,

Related to post
http://ecos.sourceware.org/ml/ecos-discuss/2010-04/msg00026.html, here
is a possible small patch to avoid thread "hanging" situation on SMP
targets. It can be easily reproduced using the FreeBSD network stack and
HTTPD packages. Call to cyg_thread_self() in spl_any()
(packages\net\bsd_tcpip\current\src\ecos\synchc) can return wrong value.

Regards,
Christophe
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