diff options
Diffstat (limited to 'final/runtime/test/worksharing/single/omp_single_nowait.c')
-rw-r--r-- | final/runtime/test/worksharing/single/omp_single_nowait.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/final/runtime/test/worksharing/single/omp_single_nowait.c b/final/runtime/test/worksharing/single/omp_single_nowait.c new file mode 100644 index 0000000..22f8930 --- /dev/null +++ b/final/runtime/test/worksharing/single/omp_single_nowait.c @@ -0,0 +1,73 @@ +// RUN: %libomp-compile-and-run +#include <stdio.h> +#include "omp_testsuite.h" + +/* + * This test will hang if the nowait is not working properly + * + * It relies on a one thread skipping to the last single construct to + * release the threads in the first three single constructs + */ +volatile int release; +volatile int count; + +void wait_for_release_then_increment(int rank) +{ + fprintf(stderr, "Thread nr %d enters first section" + " and waits.\n", rank); + while (release == 0); + #pragma omp atomic + count++; +} + +void release_and_increment(int rank) +{ + fprintf(stderr, "Thread nr %d sets release to 1\n", rank); + release = 1; + #pragma omp atomic + count++; +} + +int test_omp_single_nowait() +{ + release = 0; + count = 0; + + #pragma omp parallel num_threads(4) + { + int rank; + rank = omp_get_thread_num (); + #pragma omp single nowait + { + wait_for_release_then_increment(rank); + } + #pragma omp single nowait + { + wait_for_release_then_increment(rank); + } + #pragma omp single nowait + { + wait_for_release_then_increment(rank); + } + + #pragma omp single + { + release_and_increment(rank); + } + } + // Check to make sure all four singles were executed + return (count==4); +} /* end of check_single_nowait*/ + +int main() +{ + int i; + int num_failed=0; + + for(i = 0; i < REPETITIONS; i++) { + if(!test_omp_single_nowait()) { + num_failed++; + } + } + return num_failed; +} |