gcc/libgomp/testsuite/libgomp.c/parallel-1.c

49 lines
777 B
C

/* Trivial test of thread startup. */
#include <omp.h>
#include <string.h>
#include <assert.h>
#include "libgomp_g.h"
static int nthr;
static int saw[4];
static void function(void *dummy)
{
int iam = omp_get_thread_num ();
if (iam == 0)
nthr = omp_get_num_threads ();
saw[iam] = 1;
}
int main()
{
omp_set_dynamic (0);
GOMP_parallel_start (function, NULL, 2);
function (NULL);
GOMP_parallel_end ();
assert (nthr == 2);
assert (saw[0] != 0);
assert (saw[1] != 0);
assert (saw[2] == 0);
memset (saw, 0, sizeof (saw));
GOMP_parallel_start (function, NULL, 3);
function (NULL);
GOMP_parallel_end ();
assert (nthr == 3);
assert (saw[0] != 0);
assert (saw[1] != 0);
assert (saw[2] != 0);
assert (saw[3] == 0);
return 0;
}