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// RUN: %libomp-compile-and-run
// UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8
// UNSUPPORTED: clang-3, clang-4, clang-5, clang-6, clang-7, clang-8
// TODO: update expected result when icc supports mutexinoutset
// XFAIL: icc
// Tests OMP 5.0 task dependences "mutexinoutset", emulates compiler codegen
// Mutually exclusive tasks get same input dependency info array
//
// Task tree created:
// task0 task1
// \ / \
// task2 task5
// / \
// task3 task4
// / \
// task6 <-->task7 (these two are mutually exclusive)
// \ /
// task8
//
#include <stdio.h>
#include <omp.h>
#include "omp_my_sleep.h"
static int checker = 0; // to check if two tasks run simultaneously
static int err = 0;
#ifndef DELAY
#define DELAY 0.1
#endif
int mutex_task(int task_id) {
int th = omp_get_thread_num();
#pragma omp atomic
++checker;
printf("task %d, th %d\n", task_id, th);
if (checker != 1) {
err++;
printf("Error1, checker %d != 1\n", checker);
}
my_sleep(DELAY);
if (checker != 1) {
err++;
printf("Error2, checker %d != 1\n", checker);
}
#pragma omp atomic
--checker;
return 0;
}
int main()
{
int i1,i2,i3,i4;
omp_set_num_threads(2);
#pragma omp parallel
{
#pragma omp single nowait
{
int t = omp_get_thread_num();
#pragma omp task depend(in: i1, i2)
{ int th = omp_get_thread_num();
printf("task 0_%d, th %d\n", t, th);
my_sleep(DELAY); }
#pragma omp task depend(in: i1, i3)
{ int th = omp_get_thread_num();
printf("task 1_%d, th %d\n", t, th);
my_sleep(DELAY); }
#pragma omp task depend(in: i2) depend(out: i1)
{ int th = omp_get_thread_num();
printf("task 2_%d, th %d\n", t, th);
my_sleep(DELAY); }
#pragma omp task depend(in: i1)
{ int th = omp_get_thread_num();
printf("task 3_%d, th %d\n", t, th);
my_sleep(DELAY); }
#pragma omp task depend(out: i2)
{ int th = omp_get_thread_num();
printf("task 4_%d, th %d\n", t, th);
my_sleep(DELAY+0.1); } // wait a bit longer than task 3
#pragma omp task depend(out: i3)
{ int th = omp_get_thread_num();
printf("task 5_%d, th %d\n", t, th);
my_sleep(DELAY); }
#pragma omp task depend(mutexinoutset: i1, i4)
{ mutex_task(6); }
#pragma omp task depend(mutexinoutset: i1, i4)
{ mutex_task(7); }
#pragma omp task depend(in: i1)
{ int th = omp_get_thread_num();
printf("task 8_%d, th %d\n", t, th);
my_sleep(DELAY); }
} // single
} // parallel
if (err == 0) {
printf("passed\n");
return 0;
} else {
printf("failed\n");
return 1;
}
}
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