On Tue, 5 Aug 2003, Takashi Iwai wrote:
> At Wed, 30 Jul 2003 23:21:52 +0400,
> Konstantin Stepaniuk wrote:
> >
> > Jaroslav Kysela wrote:
> >
> > >On Wed, 30 Jul 2003, Konstantin Stepaniuk wrote:
> > >
> > >
> > >
> > >>Hello.
> > >>
> > >>My program call snd_pcm_open() with "plug:dmix" in thread.
> > >>Function snd_pcm_direct_server_create() hangs on waitpid() if exit() is used,
> > >>and server_job process keeps alive after program exit.
> > >>This trivial patch chages exit() to _exit() in file pcm_direct.c. In this case
> > >>all works ok for me.
> > >>
> > >>
> > >
> > >I'm sorry, but I still don't see a reason (I'd like to know, why the
> > >process hangs). Could you explain the behaviour or send me a simple test
> > >code to debug this thing?
> > >
> > > Jaroslav
> > >
> > >-----
> > >Jaroslav Kysela <[EMAIL PROTECTED]>
> > >Linux Kernel Sound Maintainer
> > >ALSA Project, SuSE Labs
> > >
> > >
> > Here's a test:
> > /* dmix.c */
> > #define ALSA_PCM_NEW_HW_PARAMS_API
> > #define ALSA_PCM_NEW_SW_PARAMS_API
> > #include <alsa/asoundlib.h>
> > #include <pthread.h>
> > #include <stdio.h>
> >
> > void *thread_routine( void *param )
> > {
> > snd_pcm_t *pcm;
> > int err;
> >
> > err = snd_pcm_open( &pcm, "plug:dmix",
> > SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK );
> >
> > if( err < 0 )
> > {
> > fprintf( stderr, "%s\n", snd_strerror(err) );
> > return NULL;
> > }
> >
> > printf( "alsa opened\n" );
> >
> > snd_pcm_close( pcm );
> > return NULL;
> > }
> >
> > int main( void )
> > {
> > pthread_t thread;
> > int i;
> >
> > if( pthread_create( &thread, 0, thread_routine, NULL ) )
> > {
> > fprintf( stderr, "pthread_create failure\n" );
> > return -1;
> > }
> >
> > pthread_join( thread, NULL );
> > return 0;
> > }
> > /*--------------------*/
> >
> > This program crashes without any error message and doesn't print "alsa
> > opened".
> >
> > sound card: intel8x0
> > alsa version: cvs snapshot 2003-07-30
> > kernel version: 2.4.21 (Debian)
> > glibc: 2.3.1
> >
> > This works ok with cmipci card. Maybe problem with intel8x0?
>
> seems working on other cards, too.
>
> are the alsa-lib version on both systems really same?
And could you compare glibc versions?
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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