summaryrefslogtreecommitdiff
path: root/tests/once1.c
blob: 661d3224d73f8c1bd59c52ed054dfffa1e65f0f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/*
 * Test for pthread_once().
 *
 * Depends on functions: pthread_create.
 */

#include <pthread.h>
#include <stdio.h>

pthread_once_t once = PTHREAD_ONCE_INIT;

void
myfunc(void)
{
	printf("only see this once\n");
}

void *
mythread(void * arg)
{
   int rc = pthread_once(&once, myfunc);
   printf("returned %d\n", rc); 

   return 0;
}

int
main()
{
  int rc;
  pthread_t t1, t2;
  
  if (pthread_create(&t1, NULL, mythread, NULL) != 0)
    {
      return 1;
    }

  if (pthread_create(&t2, NULL, mythread, NULL) != 0)
    {
      return 1;
    }

  Sleep(2000);
  return 0;
}