[Xenomai-main] Bug in xenomai on top of POSIX

[Christian GAGNERAUD]

Hi all,

I think i found a bug in the posix layer (i know it will never be used 
since the fusion with RTAI but..).

it concerne xnarch_init_thread(), posix_thread_trampoline(), 
thread_spawned and posix_spawnmutex etc...

when a thread create and start another thread (that is less prioritary 
than the creator) and try to delete it, the system block on the next 
creation/start done by the same creator thread.

by reading and tracing these 2 functions (by xnarch_printf) i found that 
at the second creation/start the creator block on the first call to 
pthread_mutex_lock(&posix_spawnmutex) and that the
while(!thread_spawned) 
{pthread_cond_wait(&posix_spawnflag,&posix_spawnmutex);}

is executed only the first time.


all these seem to be solved by adding a
thread_spawned = 0;
before the call to
pthread_create(&tcb->thid,&thattr,posix_thread_trampoline,tcb);
in xnarch_init_thread()

When the thread created by the creator is delete by another thread (not 
the creator), all seems to work fine.

I use xenomai v1.1.1 on a linux redhat 7.2 (original kernel 2.4.7-10)

Am i right or is my own interface code that cause this bug?


best regards.
Chris.

--
Gagneraud Christian

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