1 // RUN: %libomp-compile-and-run
2 // UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8
3 // UNSUPPORTED: icc, clang
4
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <omp.h>
8
9 #define NUM_TEAMS 2
10 #define NUM_THREADS_PER_TEAM 3
11
main(int argc,char ** argv)12 int main(int argc, char** argv) {
13 #pragma omp teams num_teams(NUM_TEAMS)
14 {
15 int i;
16 int members[NUM_THREADS_PER_TEAM];
17 // Only an upper bound is guaranteed for number of teams
18 int nteams = omp_get_num_teams();
19 if (nteams > NUM_TEAMS) {
20 fprintf(stderr, "error: too many teams: %d\n", nteams);
21 exit(1);
22 }
23 for (i = 0; i < NUM_THREADS_PER_TEAM; ++i)
24 members[i] = -1;
25 #pragma omp parallel num_threads(NUM_THREADS_PER_TEAM) private(i)
26 {
27 int tid = omp_get_thread_num();
28 int team_id = omp_get_team_num();
29 int nthreads = omp_get_num_threads();
30 if (nthreads != NUM_THREADS_PER_TEAM) {
31 fprintf(stderr, "error: detected number of threads (%d) is not %d\n",
32 nthreads, NUM_THREADS_PER_TEAM);
33 exit(1);
34 }
35 if (tid < 0 || tid >= nthreads) {
36 fprintf(stderr, "error: thread id is out of range: %d\n", tid);
37 exit(1);
38 }
39 if (team_id < 0 || team_id > omp_get_num_teams()) {
40 fprintf(stderr, "error: team id is out of range: %d\n", team_id);
41 exit(1);
42 }
43 members[omp_get_thread_num()] = 1;
44 #pragma omp barrier
45 #pragma omp single
46 {
47 for (i = 0; i < NUM_THREADS_PER_TEAM; ++i) {
48 if (members[i] != 1) {
49 fprintf(stderr, "error: worker %d not flagged\n", i);
50 exit(1);
51 }
52 }
53 }
54 }
55 }
56 return 0;
57 }
58