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- #include <omp.h>
- #include <stdlib.h>
- int
- main (void)
- {
- int i = 0, j = 0, k = ~0, l;
- double d = 1.0;
- #pragma omp parallel num_threads(4)
- {
- #pragma omp single
- {
- i = 16;
- k ^= (1 << 16);
- d += 32.0;
- }
- #pragma omp for reduction(+:i) reduction(*:d) reduction(&:k)
- for (l = 0; l < 4; l++)
- {
- if (omp_get_num_threads () == 4 && (i != 0 || d != 1.0 || k != ~0))
- #pragma omp atomic
- j |= 1;
-
- if (l == omp_get_thread_num ())
- {
- i = omp_get_thread_num ();
- d = i + 1;
- k = ~(1 << (2 * i));
- }
- }
- if (omp_get_num_threads () == 4)
- {
- if (i != (16 + 0 + 1 + 2 + 3))
- #pragma omp atomic
- j |= 2;
- if (d != (33.0 * 1.0 * 2.0 * 3.0 * 4.0))
- #pragma omp atomic
- j |= 4;
- if (k != (~0 ^ 0x55 ^ (1 << 16)))
- #pragma omp atomic
- j |= 8;
- }
- }
- if (j)
- abort ();
- return 0;
- }
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