Is there a bug in c/src/aclocal/check-smp.m4 ?
Joel Sherrill
joel.sherrill at OARcorp.com
Thu May 22 23:08:27 UTC 2014
I don't see how that can possibly be anything but a typo.
I am going to commit a fix on the grounds of obvious.
Thanks.
--joel
On 5/22/2014 5:08 PM, Tom Smith wrote:
> |AC_CACHE_CHECK([whether CPU supports SMP],
> rtems_cv_HAS_POSIX_API,
> [dnl
> case "$RTEMS_CPU" in
> *)
> if test "${RTEMS_HAS_SMP}" = "yes"; then
> rtems_cv_HAS_SMP="yes";
> else
> rtems_cv_HAS_SMP="disabled";
> fi
> ;;
> esac])|
>
> |should rtems_cv_HAS_POSIX_API be |rtems_cv_HAS_SMP ?
> |
> |
> |
> |
> 2014-05-23 1:00 GMT+08:00 <rtems-users-request at rtems.org
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> Today's Topics:
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> 1. Is there a bug using select() ? (Thomas Kim)
> 2. Re: Is there a bug using select() ? (Sebastian Huber)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 22 May 2014 18:09:27 +0900
> From: Thomas Kim <thomas73.kim at gmail.com
> <mailto:thomas73.kim at gmail.com>>
> To: "rtems-users at rtems.org <mailto:rtems-users at rtems.org>"
> <rtems-users at rtems.org <mailto:rtems-users at rtems.org>>
> Subject: Is there a bug using select() ?
> Message-ID:
>
> <CADY8aTDk89AvKHsOwx0cWhxZ6mnSS0JH1AVJE-1pgfNQrXTvig at mail.gmail.com <mailto:CADY8aTDk89AvKHsOwx0cWhxZ6mnSS0JH1AVJE-1pgfNQrXTvig at mail.gmail.com>>
> Content-Type: text/plain; charset="utf-8"
>
> Dear Sir,
>
> I am tring to integrate POSIX application on RTEMS.
> our POSIX application use select() for I/O multiplexing mechanism.
> At this time, select() always return "-1" value, it mean "bad file
> number".
>
> Therefore, I tested simple test code using select() function in below;
> Is it a bug using select() ? and, Is there how to do fix this
> problem ?
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> void test_select(void)
> {
> int fd[2];
> int i;
> int n;
> int state;
>
> char buf[255];
>
> struct timeval tv;
>
> fd_set readfds, writefds;
>
> mkdir ("tmp", S_IRWXU|S_IRWXG|S_IRWXO);
>
> if ((fd[0] = open("/tmp/testfile", O_CREAT | O_RDONLY)) == -1)
> {
> printf("file open error : ");
> exit(0);
> }
> if ((fd[1] = open("/tmp/testfile2", O_CREAT | O_RDONLY)) == -1)
> {
> printf("file open error : ");
> exit(0);
> }
>
> memset (buf, 0x00, 255);
>
> for(;;)
> {
> FD_ZERO(&readfds);
> FD_SET(fd[0], &readfds);
> FD_SET(fd[1], &readfds);
>
> state = select(fd[1]+1, &readfds, NULL, NULL, NULL);
> switch(state)
> {
> case -1:
> perror("select error : ");
> exit(0);
> break;
>
> default :
> for (i = 0; i < 2; i++)
> {
> if (FD_ISSET(fd[i], &readfds))
> {
> while ((n = read(fd[i], buf, 255)) > 0)
> printf("(%d) [%d] %s", state, i, buf);
> }
> }
> memset (buf, 0x00, 255);
> break;
> }
> usleep(1000);
> }
> }
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Best Regards.
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> ------------------------------
>
> Message: 2
> Date: Thu, 22 May 2014 11:24:09 +0200
> From: Sebastian Huber <sebastian.huber at embedded-brains.de
> <mailto:sebastian.huber at embedded-brains.de>>
> To: rtems-users at rtems.org <mailto:rtems-users at rtems.org>
> Subject: Re: Is there a bug using select() ?
> Message-ID: <537DC239.6090702 at embedded-brains.de
> <mailto:537DC239.6090702 at embedded-brains.de>>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 2014-05-22 11:09, Thomas Kim wrote:
> > I am tring to integrate POSIX application on RTEMS.
> > our POSIX application use select() for I/O multiplexing mechanism.
> > At this time, select() always return "-1" value, it mean "bad
> file number".
> >
> > Therefore, I tested simple test code using select() function in
> below;
> > Is it a bug using select() ? and, Is there how to do fix this
> problem ?
> >
>
> The select() function works only with sockets on RTEMS. With the
> new network
> stack it is also possible to use select() for normal files:
>
> http://git.rtems.org/rtems-libbsd/
>
> The new network stack supports also kqueue().
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone : +49 89 189 47 41-16
> Fax : +49 89 189 47 41-09
> E-Mail : sebastian.huber at embedded-brains.de
> <mailto:sebastian.huber at embedded-brains.de>
> PGP : Public key available on request.
>
> Diese Nachricht ist keine gesch?ftliche Mitteilung im Sinne des EHUG.
>
>
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>
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> End of rtems-users Digest, Vol 92, Issue 18
> *******************************************
>
>
--
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherrill at OARcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
Support Available (256) 722-9985
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