Ada's SELECT in C

[Pattara Kiatisevi]

On Fri, 1 Mar 2002, Joel Sherrill wrote:

>
>
> Pattara Kiatisevi wrote:
> >
> > On Fri, 1 Mar 2002, Joel Sherrill wrote:
> >
> > >
> > >
> > > Pattara Kiatisevi wrote:
> > > >
> > > > Ok, I get it worked with pthread now, code is much longer and more
> > > > complex). But hmm, now I can't find the libpthread.a for
> > > > SPARC/LEON....does it exist?
> > >
> > > If you configured RTEMS with --enable-posix, then it is in the
> > > main RTEMS library.  You should link against it by default.
> >
> > If I can find the /opt/rtems/sparc-rtems/include/pthread.h then it might
> > mean that it was compiled using --enable-posix? Hmm but how can I link it?
>
> Unfortunately pthread.h is always there because newlib owns it. :)
> I think a better file to look for would be mutex.h.  It does
> look like your RTEMS was configured and installed with POSIX
> disabled though.

You are right. Now I recompiled RTEMS with --enable-posix and it was
successful. The player code could not run on RTEMS/TSIM/LEON fully yet
because I have to implement the input file. I plan to have the player read
the input file from a device (say, /dev/soundinput) which now I implement
as a device driver that contains static content of song but later maybe we
can read from other kinds of devices e.g. /dev/usb.

Thanks a lot and have a nice weekend,
Pattara

>
> > $ make player-tsim
> > sparc-rtems-gcc -static -O2   -DTSIM -rtems -DRTEMS
> > -I/usr/local/rtems/sparc-rtems/include
> > -I/home/pattara/thesis/vorbis/libvorbis-1.0rc3/include/
> > -I/home/pattara/thesis/vorbis/libogg-1.0rc3/include/
> > sparc-rtems-fpu/libvorbis.a  -L/usr/local/rtems/sparc-rtems/lib/ -lm
> > sparc-rtems-fpu/libogg.a /usr/local/rtems/sparc-rtems/lib/libc.a  -o
> > player-tsim player.c
> > /tmp/ccU6Ycyn.o: In function `playSound':
> > /tmp/ccU6Ycyn.o(.text+0x1fc): undefined reference to `pthread_mutex_lock'
> > /tmp/ccU6Ycyn.o(.text+0x220): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o: In function `playAudioTask':
> > /tmp/ccU6Ycyn.o(.text+0x248): undefined reference to `pthread_mutex_lock'
> > /tmp/ccU6Ycyn.o(.text+0x260): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o(.text+0x280): undefined reference to `pthread_cond_wait'
> > /tmp/ccU6Ycyn.o(.text+0x288): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o(.text+0x290): undefined reference to `pthread_cond_signal'
> > /tmp/ccU6Ycyn.o: In function `main':
> > /tmp/ccU6Ycyn.o(.text+0x2dc): undefined reference to `pthread_mutex_init'
> > /tmp/ccU6Ycyn.o(.text+0x2f4): undefined reference to `pthread_mutex_init'
> > /tmp/ccU6Ycyn.o(.text+0x304): undefined reference to `pthread_mutex_init'
> > /tmp/ccU6Ycyn.o(.text+0x318): undefined reference to `pthread_cond_init'
> > /tmp/ccU6Ycyn.o(.text+0x324): undefined reference to `pthread_cond_init'
> > /tmp/ccU6Ycyn.o(.text+0x33c): undefined reference to `ov_open'
> > /tmp/ccU6Ycyn.o(.text+0x388): undefined reference to `pthread_create'
> > /tmp/ccU6Ycyn.o(.text+0x3bc): undefined reference to `pthread_create'
> > /tmp/ccU6Ycyn.o(.text+0x3e4): undefined reference to `ov_comment'
> > /tmp/ccU6Ycyn.o(.text+0x3f4): undefined reference to `ov_info'
> > /tmp/ccU6Ycyn.o(.text+0x47c): undefined reference to `ov_pcm_total'
> > /tmp/ccU6Ycyn.o(.text+0x4a0): undefined reference to `ov_comment'
> > /tmp/ccU6Ycyn.o(.text+0x4fc): undefined reference to `pthread_mutex_lock'
> > /tmp/ccU6Ycyn.o(.text+0x520): undefined reference to `ov_read'
> > /tmp/ccU6Ycyn.o(.text+0x538): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o(.text+0x560): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o(.text+0x570): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o(.text+0x57c): undefined reference to `pthread_mutex_lock'
> > /tmp/ccU6Ycyn.o(.text+0x5a0): undefined reference to `pthread_cond_signal'
> > /tmp/ccU6Ycyn.o(.text+0x5ac): undefined reference to `pthread_cond_wait'
> > /tmp/ccU6Ycyn.o(.text+0x5b4): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o(.text+0x5cc): undefined reference to `ov_clear'
> > /tmp/ccU6Ycyn.o(.text+0x5d8): undefined reference to `pthread_mutex_lock'
> > /tmp/ccU6Ycyn.o(.text+0x5e8): undefined reference to
> > `pthread_mutex_unlock'
> > /tmp/ccU6Ycyn.o(.text+0x5f0): undefined reference to `pthread_cond_signal'
> > /tmp/ccU6Ycyn.o(.text+0x610): undefined reference to `pthread_join'
> > /tmp/ccU6Ycyn.o(.text+0x618): undefined reference to `pthread_cancel'
> > /tmp/ccU6Ycyn.o(.text+0x624): undefined reference to `pthread_join'
> > /tmp/ccU6Ycyn.o(.data+0x7c): undefined reference to `Init'
> > collect2: ld returned 1 exit status
> > make: *** [player-tsim] Fehler 1
> >
> > Thank you very much,
> > Pattara
> >
> > >
> > > --joel
> > >
> > > > Thanks,
> > > > Pattara
> > > >
> > > > On Thu, 28 Feb 2002, Pattara Kiatisevi wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > I have a not-so-directly-involved-with-RTEMS question but just ask for
> > > > > conceptual idea. As I learnt the syntax "SELECT" in ADA and now have to
> > > > > program with pthread on RTEMS. Anybody knows how to translate the
> > > > > following snippet of psuedo code into pthread's concept?
> > > > >
> > > > > buffer_t buffer[xxx];
> > > > > task Player;
> > > > >
> > > > > main {
> > > > >   int currentbuffer = 0;
> > > > >   Create and run Player task;
> > > > >   while(input not EOF) {
> > > > >     decode_music_from_input_to(buffer[currentbuffer]);
> > > > >     Play.goPlay(currentbuffer); // Block if Player is still busy
> > > > >     Change value of currentbuffer to whatever e.g. +=1
> > > > >   }
> > > > >   play.stop();
> > > > > }
> > > > >
> > > > > Player {
> > > > >   forever {
> > > > >    Select
> > > > >      Accept Stop() : exit ;
> > > > >      Accept Goplay(currentbuffer) :  // only this line in rendezvous
> > > > >        Outputsound(buffer[currentbuffer]);
> > > > >        //this output sound could block
> > > > >    End Select;
> > > > >   }
> > > > > }
> > > > >
> > > > > Thank you for all the answer(s),
> > > > > Pattara
> > > > > --
> > > > > Please avoid sending me Word or PowerPoint attachments.
> > > > > See http://www.fsf.org/philosophy/no-word-attachments.html
> > > > > ----------------------------------------------------------------------
> > > > > Ott Pattara Kiatisevi                                    T L W G
> > > > > M.Sc. INFOTECH Student, Stuttgart, Germany    http://linux.thai.net/
> > > > > ----------------------------------------------------------------------
> > > > >
> > > > >
> > > > >
> > >
> > > --
> > > Joel Sherrill, Ph.D.             Director of Research & Development
> > > joel at OARcorp.com                 On-Line Applications Research
> > > Ask me about RTEMS: a free RTOS  Huntsville AL 35805
> > > Support Available                (256) 722-9985
> > >
> > >
>
> --
> Joel Sherrill, Ph.D.             Director of Research & Development
> joel at OARcorp.com                 On-Line Applications Research
> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
> Support Available                (256) 722-9985
>
>