1 #include <omp.h> 2 #include <stdlib.h> 3 4 int 5 main (void) 6 { 7 int i = 0, j = 0, k = 0, l = 0; 8 #pragma omp parallel num_threads(4) reduction(-:i) reduction(|:k) \ 9 reduction(^:l) 10 { 11 if (i != 0 || k != 0 || l != 0) 12 #pragma omp atomic 13 j |= 1; 14 15 if (omp_get_num_threads () != 4) 16 #pragma omp atomic 17 j |= 2; 18 19 i = omp_get_thread_num (); 20 k = 1 << (2 * i); 21 l = 0xea << (3 * i); 22 } 23 24 if (j & 1) 25 abort (); 26 if ((j & 2) == 0) 27 { 28 if (i != (0 + 1 + 2 + 3)) 29 abort (); 30 if (k != 0x55) 31 abort (); 32 if (l != 0x1e93a) 33 abort (); 34 } 35 return 0; 36 } 37