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Date:      Sat, 06 Jun 1998 00:27:49 +1000 (EST)
From:      Simon Coggins <chaos@oz.org>
To:        freebsd-current@FreeBSD.ORG
Subject:   Problem with libc_r and blocking.
Message-ID:  <XFMail.980606002749.chaos@oz.org>
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[-- Attachment #1 --]

I've come across a problem trying to use c_r on freebsd-current. In the
configure script of Roxen (http://www.roxen.com) web server, if you try and
make the package use freebsd's libc_r (it takes alittle hacking in configure)
when it find the threads functions correctly. But when it gets to test
how to set things non-blocking it freezes and locks up.

I've attached the .c file of what configure is doing when this happends if you
compile this with

gcc -pthread -D_THREAD_SAFE -o tst thread_test.c

and run it it will lock up if you leave off -pthread it works correctly.

Anyone out there have any idea? (are there plans to improve the threads support
in freebsd?) I was looking thru the archives and didn't see much in the way of
development info.

Regards
Simon

      +---------------------------------------------------------------+
      |  Email: chaos@ultra.net.au, chaos@oz.org, simon@bofh.com.au   |
      |   http://www.ultra.net.au/~chaos   Ultranet Technical Admin.  |
      |       Chaos on IRC,    IRC Operator for the OzORG Network     |
      +---------------------------------------------------------------+
---
"I stopped believing in Santa Claus when I was six.  Mother took me to
see him in a department store and he asked for my autograph."
                -- Shirley Temple


[-- Attachment #2 --]
#include <signal.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <sys/filio.h>
#include <sys/sockio.h>

int set_nonblocking(int fd,int which)
{
	fprintf(stderr, "set_nonblocking()\n");
  return fcntl(fd, F_SETFL, which?FNDELAY:0);
}

int query_nonblocking(int fd)
{
	fprintf(stderr, "query_nonblocking()\n");
  return fcntl(fd, F_GETFL, 0) & FNDELAY;
}

int set_close_on_exec(int fd, int which)
{
	fprintf(stderr, "set_close_on_exec()\n");
  return fcntl(fd, F_SETFD, !!which);
}

void sigalrm_handler0(int tmp) { exit(0); }
void sigalrm_handler1(int tmp)
{
  fprintf(stderr,"Failed in alarm handler 1\n");
  exit(1);
}

int main()
{
  int tmp[2];
  char foo[1000];

  tmp[0]=0;
  tmp[1]=0;

	fprintf(stdout, "Testing!!!\n");
  set_nonblocking(tmp[0],1);
  signal(SIGALRM, sigalrm_handler1);
  alarm(1);
  read(tmp[0],foo,999);
  set_nonblocking(tmp[0],0);
  signal(SIGALRM, sigalrm_handler0);
  alarm(1);
  read(tmp[0],foo,999);
  fprintf(stderr,"Failed at end of main.\n");
  exit(1);
}

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