From owner-freebsd-hackers  Thu Jan 15 09:10:29 1998
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id JAA11292
          for hackers-outgoing; Thu, 15 Jan 1998 09:10:29 -0800 (PST)
          (envelope-from owner-freebsd-hackers@FreeBSD.ORG)
Received: from plains.NoDak.edu (tinguely@plains.NoDak.edu [134.129.111.64])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id JAA11277
          for <freebsd-hackers@FreeBSD.ORG>; Thu, 15 Jan 1998 09:10:03 -0800 (PST)
          (envelope-from tinguely@plains.NoDak.edu)
Received: (from tinguely@localhost)
	by plains.NoDak.edu (8.8.8/8.8.8) id LAA17795;
	Thu, 15 Jan 1998 11:09:57 -0600 (CST)
Date: Thu, 15 Jan 1998 11:09:57 -0600 (CST)
From: Mark Tinguely <tinguely@plains.NoDak.edu>
Message-Id: <199801151709.LAA17795@plains.NoDak.edu>
To: freebsd-hackers@FreeBSD.ORG, jacques@oskar.nanoteq.co.za
Subject: Re: Pthreads question
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk

This semester, a NDSU CS class started to use pthreads. From the last couple
days worth of seeing them struggle, it is MHO that libc_r is buggy and old.
you may want to get Pthreads 1.8.3 from:

	http://www.humanfactor.com/pthreads/

it took  minor changes to port your example to pthread 1.8.3 (below),
but the output was:

$ ./xxxpthread  0
[.]
[.]
$ ./xxxpthread  1
[.]
[.]


*** xxxpthread.c.orig	Thu Jan 15 11:04:01 1998
--- xxxpthread.c	Thu Jan 15 11:00:05 1998
***************
*** 11,16 ****
--- 11,20 ----
  pthread_mutex_t mu;
  int fin=0;
  
+ extern pthread_attr_t pthread_attr_default;
+ pthread_mutexattr_t pthread_mutexattr_default = { MUTEX_TYPE_FAST, 0 };
+ pthread_condattr_t pthread_condattr_default = { MUTEX_TYPE_FAST, 0 };
+ 
  void fg(void)
  {
    struct timespec ts;
***************
*** 46,63 ****
    if (argc<2)
      exit(1);
  
!   pthread_mutex_init(&mu,pthread_mutexattr_default);
!   pthread_cond_init(&co,pthread_condattr_default);
  
!   pthread_create(&th,pthread_attr_default,(void *)bg,NULL);
  
    if (argv[1][0]=='1')
!     pthread_create(&th2,pthread_attr_default,(void *)fg,NULL);
    else
      fg();
  
    pthread_join(th,NULL);
!   pthread_detach(&th);
    pthread_cond_destroy(&co);
    pthread_mutex_destroy(&mu);
  
--- 50,67 ----
    if (argc<2)
      exit(1);
  
!   pthread_mutex_init(&mu,&pthread_mutexattr_default);
!   pthread_cond_init(&co,&pthread_condattr_default);
  
!   pthread_create(&th,&pthread_attr_default,(void *)bg,NULL);
  
    if (argv[1][0]=='1')
!     pthread_create(&th2,&pthread_attr_default,(void *)fg,NULL);
    else
      fg();
  
    pthread_join(th,NULL);
!   pthread_detach(th);
    pthread_cond_destroy(&co);
    pthread_mutex_destroy(&mu);