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// RUN: %libomp-compile-and-run
#include <stdio.h>
#include <stdlib.h>
#include <omp.h>
int a;
void inc_a() {
#pragma omp atomic
a++;
}
void root_team_detached() {
a = 0;
omp_event_handle_t ev;
#pragma omp task detach(ev)
inc_a();
omp_fulfill_event(ev);
if (a != 1) {
fprintf(stderr, "error: root_team_detached(): a != 1\n");
exit(EXIT_FAILURE);
}
}
void root_team_hidden_helpers() {
a = 0;
#pragma omp target nowait
inc_a();
#pragma omp taskwait
if (a != 1) {
fprintf(stderr, "error: root_team_hidden_helpers(): a != 1\n");
exit(EXIT_FAILURE);
}
}
void parallel_detached(int nth1) {
a = 0;
omp_event_handle_t *evs =
(omp_event_handle_t *)malloc(sizeof(omp_event_handle_t) * nth1);
#pragma omp parallel num_threads(nth1)
{
int tid = omp_get_thread_num();
omp_event_handle_t e = evs[tid];
#pragma omp task detach(e)
inc_a();
omp_fulfill_event(e);
}
free(evs);
if (a != nth1) {
fprintf(stderr, "error: parallel_detached(): a (%d) != %d\n", a, nth1);
exit(EXIT_FAILURE);
}
}
void parallel_hidden_helpers(int nth1) {
a = 0;
#pragma omp parallel num_threads(nth1)
{
#pragma omp target nowait
inc_a();
}
if (a != nth1) {
fprintf(stderr, "error: parallel_hidden_helpers(): a (%d) != %d\n", a,
nth1);
exit(EXIT_FAILURE);
}
}
void nested_parallel_detached(int nth1, int nth2) {
a = 0;
omp_event_handle_t **evs =
(omp_event_handle_t **)malloc(sizeof(omp_event_handle_t *) * nth1);
#pragma omp parallel num_threads(nth1)
{
int tid = omp_get_thread_num();
evs[tid] = (omp_event_handle_t *)malloc(sizeof(omp_event_handle_t) * nth2);
#pragma omp parallel num_threads(nth2) shared(tid)
{
int tid2 = omp_get_thread_num();
omp_event_handle_t e = evs[tid][tid2];
#pragma omp task detach(e)
inc_a();
omp_fulfill_event(e);
}
free(evs[tid]);
}
free(evs);
if (a != nth1 * nth2) {
fprintf(stderr, "error: nested_parallel_detached(): a (%d) != %d * %d\n", a,
nth1, nth2);
exit(EXIT_FAILURE);
}
}
void nested_parallel_hidden_helpers(int nth1, int nth2) {
a = 0;
#pragma omp parallel num_threads(nth1)
{
#pragma omp parallel num_threads(nth2)
{
#pragma omp target nowait
inc_a();
}
}
if (a != nth1 * nth2) {
fprintf(stderr,
"error: nested_parallel_hidden_helpers(): a (%d) != %d * %d\n", a,
nth1, nth2);
exit(EXIT_FAILURE);
}
}
int main() {
int i, nth1, nth2;
omp_set_max_active_levels(2);
omp_set_dynamic(0);
for (i = 0; i < 10; ++i)
root_team_detached();
for (i = 0; i < 10; ++i)
root_team_hidden_helpers();
for (i = 0; i < 10; ++i)
for (nth1 = 1; nth1 <= 4; ++nth1)
parallel_detached(nth1);
for (i = 0; i < 10; ++i)
for (nth1 = 1; nth1 <= 4; ++nth1)
parallel_hidden_helpers(nth1);
for (i = 0; i < 10; ++i)
for (nth1 = 1; nth1 <= 4; ++nth1)
for (nth2 = 1; nth2 <= 4; ++nth2)
nested_parallel_detached(nth1, nth2);
for (i = 0; i < 10; ++i)
for (nth1 = 1; nth1 <= 4; ++nth1)
for (nth2 = 1; nth2 <= 4; ++nth2)
nested_parallel_hidden_helpers(nth1, nth2);
return 0;
}
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