omp_lock.c

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// RUN: %libomp-compile-and-run
// RUN: env KMP_LOCK_KIND=tas KMP_SPIN_BACKOFF_PARAMS=2048,200 %libomp-run
// RUN: env KMP_LOCK_KIND=futex %libomp-run
#include <stdio.h>
#include "omp_testsuite.h"
 
omp_lock_t lck;
 
int test_omp_lock()
{
  int nr_threads_in_single = 0;
  int result = 0;
  int nr_iterations = 0;
  int i;
 
  omp_init_lock(&lck);
  #pragma omp parallel shared(lck)
  {
    #pragma omp for
    for(i = 0; i < LOOPCOUNT; i++) {
      omp_set_lock(&lck);
      #pragma omp flush
      nr_threads_in_single++;
      #pragma omp flush
      nr_iterations++;
      nr_threads_in_single--;
      result = result + nr_threads_in_single;
      omp_unset_lock(&lck);
    }
  }
  omp_destroy_lock(&lck);
 
  return ((result == 0) && (nr_iterations == LOOPCOUNT));
}
 
int main()
{
  int i;
  int num_failed=0;
 
  for(i = 0; i < REPETITIONS; i++) {
    if(!test_omp_lock()) {
      num_failed++;
    }
  }
  return num_failed;
}