/*
UPC Testing Suite

Copyright (C) 2000 Chen Jianxun, Sebastien Chauvin, Tarek El-Ghazawi

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
/**
   Test: VII_case2_iii  - upc_wait with an expression which contains
                          shared references (same expression). 
   Purpose:
         To check that a thread can not proceed after the upc_wait statement 
         until all the other threads have reached that notify statement. 
   Type: Positive.
   How : - Declare a shared array, a, of integers of size THREADS. This array 
           will be automatically initialized to 0. 
         - Just before reaching the notify statement, each thread will set 
           a[MYTHREAD] to 1.
         - Right after the notify statement, every thread should check that 
           a[MYTHREAD] is equal to 1. Otherwise, the barrier statement is not
           working properly.
         - Right after the wait statement, every thread should check that the 
           sum of the array entries is equal to THREADS. Otherwise, the wait
           statement is not working  properly.
*/

#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <upc.h>

shared int a[THREADS];
shared int x;

int
main()
{
  int i;
  int sum;
  int errflag;

  if (MYTHREAD==0) x=6;

  upc_barrier 1;

  sleep(MYTHREAD/2);

  a[MYTHREAD] = 1;

  upc_notify x+1;

  errflag = 0;

  upc_wait x+1;

  sum=0;
  for(i=0; i<THREADS; i++)
    sum+=a[i];

  if (sum!=THREADS)
    errflag=1;

  if (errflag) {
      printf("Failure: on Thread %d with errflag %d\n",MYTHREAD,errflag);
  } else if (MYTHREAD == 0) {
      printf("Success: on Thread %d \n",MYTHREAD);
  }

  return(errflag);
}