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?
Takashi
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