| // RUN: %libomp-compile-and-run |
| |
| // Checked gcc 10.1 still does not support detach clause on task construct. |
| // UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8, gcc-9, gcc-10 |
| // gcc 11 introduced detach clause, but gomp interface in libomp has no support |
| // XFAIL: gcc-11, gcc-12 |
| // clang supports detach clause since version 11. |
| // UNSUPPORTED: clang-10, clang-9, clang-8, clang-7 |
| // icc compiler does not support detach clause. |
| // UNSUPPORTED: icc |
| |
| // The outer detachable task creates multiple child tasks with dependencies |
| // when the last inner task incremented ret, the task calls omp_fulfill_event |
| // to release the outer task. |
| |
| #include <omp.h> |
| #include <stdio.h> |
| #include "omp_my_sleep.h" |
| |
| int *buf; |
| |
| int foo(int n) |
| { |
| int ret = 0; |
| for (int i = 0; i < n; ++i) { |
| omp_event_handle_t event; |
| #pragma omp task detach(event) firstprivate(i,n) shared(ret) |
| { |
| for (int j = 0; j < n; ++j) { |
| #pragma omp task firstprivate(event,i,j,n) shared(ret) default(none) depend(out:ret) |
| { |
| //printf("Task %i, %i: %i\n", i, j, omp_get_thread_num()); |
| my_sleep(.01); |
| #pragma omp atomic |
| ret++; |
| #if _OPENMP |
| if (j == n-1) { |
| //printf("Task %i, %i: omp_fulfill_event()\n", i, j); |
| omp_fulfill_event(event); |
| } |
| #endif |
| } |
| } |
| } |
| } |
| // the taskwait only guarantees the outer tasks to complete. |
| #pragma omp taskwait |
| |
| return ret; |
| } |
| |
| |
| int main() |
| { |
| int ret; |
| #pragma omp parallel num_threads(4) |
| #pragma omp master |
| { |
| ret = foo(8); |
| } |
| printf("%i\n", ret); |
| return !(ret == 64); |
| } |