109 lines
2.0 KiB
C
109 lines
2.0 KiB
C
#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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static int count = 0;
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static void *
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thread_add_one (void *arg)
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{
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int tmp;
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pthread_spinlock_t *lock = (pthread_spinlock_t *) arg;
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/* When do_test holds the lock for 1 sec, the two thread will be
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in contention for the lock. */
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if (pthread_spin_lock (lock) != 0)
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{
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puts ("thread_add_one(): spin_lock failed");
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pthread_exit ((void *) 1l);
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}
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/* sleep 1s before modifying count */
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tmp = count;
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sleep (1);
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count = tmp + 1;
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if (pthread_spin_unlock (lock) != 0)
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{
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puts ("thread_add_one(): spin_unlock failed");
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pthread_exit ((void *) 1l);
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}
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return NULL;
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}
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static int
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do_test (void)
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{
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pthread_t thr1, thr2;
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pthread_spinlock_t lock;
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int tmp;
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if (pthread_spin_init (&lock, PTHREAD_PROCESS_PRIVATE) != 0)
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{
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puts ("spin_init failed");
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return 1;
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}
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if (pthread_spin_lock (&lock) != 0)
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{
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puts ("1st spin_lock failed");
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return 1;
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}
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if (pthread_create (&thr1, NULL, thread_add_one, (void *) &lock) != 0)
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{
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puts ("1st pthread_create failed");
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return 1;
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}
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if (pthread_create (&thr2, NULL, thread_add_one, (void *) &lock) != 0)
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{
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puts ("2nd pthread_create failed");
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return 1;
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}
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/* sleep 1s before modifying count */
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tmp = count;
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sleep (1);
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count = tmp + 1;
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if (pthread_spin_unlock (&lock) != 0)
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{
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puts ("1st spin_unlock failed");
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return 1;
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}
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void *status;
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if (pthread_join (thr1, &status) != 0)
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{
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puts ("1st pthread_join failed");
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return 1;
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}
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if (status != NULL)
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{
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puts ("failure in the 1st thread");
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return 1;
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}
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if (pthread_join (thr2, &status) != 0)
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{
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puts ("2nd pthread_join failed");
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return 1;
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}
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if (status != NULL)
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{
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puts ("failure in the 2nd thread");
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return 1;
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}
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if (count != 3)
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{
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printf ("count is %d, should be 3\n", count);
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return 1;
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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