summaryrefslogtreecommitdiff
path: root/linuxthreads/Examples/ex14.c
diff options
context:
space:
mode:
Diffstat (limited to 'linuxthreads/Examples/ex14.c')
-rw-r--r--linuxthreads/Examples/ex14.c133
1 files changed, 0 insertions, 133 deletions
diff --git a/linuxthreads/Examples/ex14.c b/linuxthreads/Examples/ex14.c
deleted file mode 100644
index 406e03f346..0000000000
--- a/linuxthreads/Examples/ex14.c
+++ /dev/null
@@ -1,133 +0,0 @@
-/* Test of POSIX barriers. */
-
-#include <pthread.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define NTHREADS 20
-
-#define ROUNDS 20
-
-static pthread_barrier_t barriers[NTHREADS];
-
-static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
-static int counters[NTHREADS];
-static int serial[NTHREADS];
-
-static void *
-worker (void *arg)
-{
- void *result = NULL;
- int nr = (long int) arg;
- int i;
-
- for (i = 0; i < ROUNDS; ++i)
- {
- int j;
- int retval;
-
- if (nr == 0)
- {
- memset (counters, '\0', sizeof (counters));
- memset (serial, '\0', sizeof (serial));
- }
-
- retval = pthread_barrier_wait (&barriers[NTHREADS - 1]);
- if (retval != 0 && retval != PTHREAD_BARRIER_SERIAL_THREAD)
- {
- printf ("thread %d failed to wait for all the others\n", nr);
- result = (void *) 1;
- }
-
- for (j = nr; j < NTHREADS; ++j)
- {
- /* Increment the counter for this round. */
- pthread_mutex_lock (&lock);
- ++counters[j];
- pthread_mutex_unlock (&lock);
-
- /* Wait for the rest. */
- retval = pthread_barrier_wait (&barriers[j]);
-
- /* Test the result. */
- if (nr == 0 && counters[j] != j + 1)
- {
- printf ("barrier in round %d released but count is %d\n",
- j, counters[j]);
- result = (void *) 1;
- }
-
- if (retval != 0)
- {
- if (retval != PTHREAD_BARRIER_SERIAL_THREAD)
- {
- printf ("thread %d in round %d has nonzero return value != PTHREAD_BARRIER_SERIAL_THREAD\n",
- nr, j);
- result = (void *) 1;
- }
- else
- {
- pthread_mutex_lock (&lock);
- ++serial[j];
- pthread_mutex_unlock (&lock);
- }
- }
-
- /* Wait for the rest again. */
- retval = pthread_barrier_wait (&barriers[j]);
-
- /* Now we can check whether exactly one thread was serializing. */
- if (nr == 0 && serial[j] != 1)
- {
- printf ("not exactly one serial thread in round %d\n", j);
- result = (void *) 1;
- }
- }
- }
-
- return result;
-}
-
-
-#define TEST_FUNCTION do_test ()
-#define TIMEOUT 60
-static int
-do_test (void)
-{
- pthread_t threads[NTHREADS];
- int i;
- void *res;
- int result = 0;
-
- /* Initialized the barrier variables. */
- for (i = 0; i < NTHREADS; ++i)
- if (pthread_barrier_init (&barriers[i], NULL, i + 1) != 0)
- {
- printf ("Failed to initialize barrier %d\n", i);
- exit (1);
- }
-
- /* Start the threads. */
- for (i = 0; i < NTHREADS; ++i)
- if (pthread_create (&threads[i], NULL, worker, (void *) (long int) i) != 0)
- {
- printf ("Failed to start thread %d\n", i);
- exit (1);
- }
-
- /* And wait for them. */
- for (i = 0; i < NTHREADS; ++i)
- if (pthread_join (threads[i], &res) != 0 || res != NULL)
- {
- printf ("thread %d returned a failure\n", i);
- result = 1;
- }
-
- if (result == 0)
- puts ("all OK");
-
- return result;
-}
-
-#include "../test-skeleton.c"