1 /** pthread_spinloc_t test. */
2
3
4 /* Make sure pthread_spinlock_t is available when compiling with older glibc
5 * versions (2.3 or before).
6 */
7 #define _GNU_SOURCE
8
9 #include <pthread.h>
10 #include <stdio.h> /* fprintf() */
11 #include <stdlib.h> /* atoi() */
12
13
14 static pthread_barrier_t s_barrier;
15 static pthread_spinlock_t s_spinlock;
16 static int s_iterations;
17 static int s_counter;
18
19
thread_func(void * arg)20 static void* thread_func(void* arg)
21 {
22 int i;
23
24 pthread_barrier_wait(&s_barrier);
25 for (i = s_iterations; i > 0; i--)
26 {
27 pthread_spin_lock(&s_spinlock);
28 s_counter++;
29 pthread_spin_unlock(&s_spinlock);
30 }
31 return 0;
32 }
33
main(int argc,char ** argv)34 int main(int argc, char** argv)
35 {
36 int i;
37 const int n_threads = 10;
38 pthread_t tid[n_threads];
39
40 s_iterations = argc > 1 ? atoi(argv[1]) : 1000;
41
42 fprintf(stderr, "Start of test.\n");
43 pthread_barrier_init(&s_barrier, 0, n_threads);
44 pthread_spin_init(&s_spinlock, 0);
45 for (i = 0; i < n_threads; i++)
46 pthread_create(&tid[i], 0, thread_func, 0);
47 for (i = 0; i < n_threads; i++)
48 pthread_join(tid[i], 0);
49 pthread_spin_destroy(&s_spinlock);
50 pthread_barrier_destroy(&s_barrier);
51 if (s_counter == n_threads * s_iterations)
52 fprintf(stderr, "Test successful.\n");
53 else
54 fprintf(stderr, "Test failed: counter = %d, should be %d\n",
55 s_counter, n_threads * s_iterations);
56 return 0;
57 }
58