source: CIVL/examples/omp/dataracebench-1.3.2/micro-benchmarks/DRB084-threadprivatemissing-orig-yes.c

/*
Copyright (c) 2017, Lawrence Livermore National Security, LLC.
Produced at the Lawrence Livermore National Laboratory
Written by Chunhua Liao, Pei-Hung Lin, Joshua Asplund,
Markus Schordan, and Ian Karlin
(email: liao6@llnl.gov, lin32@llnl.gov, asplund1@llnl.gov,
schordan1@llnl.gov, karlin1@llnl.gov)
LLNL-CODE-732144
All rights reserved.

This file is part of DataRaceBench. For details, see
https://github.com/LLNL/dataracebench. Please also see the LICENSE file
for our additional BSD notice.

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*/


/* NOTE by WenhaoWu (wuwenhao@udel.edu)
 * This example is modified so that the bound can be adjusted 
 * by defining 'N' and if it isn't defined then the bound value 
 * in the original example is used as the default value of 'N' 
 */
#ifndef N
#define N 1000
#endif 

/*
A file-scope variable used within a function called by a parallel region.
No threadprivate is used to avoid data races.

Data race pairs  sum0@71:3 vs. sum0@71:8
                 sum0@71:3 vs. sum0@71:3
*/
#include <stdio.h>
#include <assert.h>
int sum0=0, sum1=0;
//#pragma omp threadprivate(sum0)

void foo (int i)
{
  sum0=sum0+i;
}

int main()
{
  int i, sum=0;
#pragma omp parallel
  {
#pragma omp for
    for (i=1;i<=1000;i++)
    {
       foo (i);
    }   
#pragma omp critical
    {
      sum= sum+sum0;
    } 
  }  
/*  reference calculation */
  for (i=1;i<=1000;i++)
  {
    sum1=sum1+i;
  }
  printf("sum=%d; sum1=%d\n",sum,sum1);
//  assert(sum==sum1);
  return 0;
}