pthread problem

[Terry]

hi, 

i have a problem with using pth 1.4.1 as pthread library.
i did all the tests on openbsd 3.1 and also redhat linux 7.3

take this prog for example:

// prog1
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>

void *thread_function(void *arg) {
  int i;
  for ( i=0; i<20; i++ ) {
    printf("Thread says hi!\n");
    sleep(1);
  }
  return NULL;
}

int main(void) {

  pthread_t mythread;
  
  if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
    printf("error creating thread.");
    abort();
  }

  if ( pthread_join ( mythread, NULL ) ) {
    printf("error joining thread.");
    abort();
  }

  exit(0);

}

// end prog 1

i compiled it using pth as pthread library and it works as expected,
that is thread saying 'hi'.

now take this program for example:

// prog2
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>

int myglobal;

 void *thread_function(void *arg) {
  int i,j;
  for ( i=0; i<20; i++ ) {
    j=myglobal;
    j=j+1;
    printf(".");
    fflush(stdout);
   sleep(1);
    myglobal=j;
  }
  return NULL;
}

int main(void) {

  pthread_t mythread;
  int i;

  if ( pthread_create( &mythread, NULL, thread_function, NULL) ) {
    printf("error creating thread.");
    abort();
  }

  for ( i=0; i<20; i++) {
    myglobal=myglobal+1;
    printf("o");
    fflush(stdout);
    sleep(1);
  }

  if ( pthread_join ( mythread, NULL ) ) {
    printf("error joining thread.");
    abort();
  }

  printf("\nmyglobal equals %d\n",myglobal);

  exit(0);

}
// end prog2

it does not work properly on pth.
built with native threads (on linux and openbsd) it
writes 'o' and '.' on stdout.

with pth though, although theres no problem with creating
thread, the created thread is dead. i can only see 'o's on output and not
a single '.'.

is this a bug in pth or i am doing something wrong ?

thanks in advance,
terry

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