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Adding cpp mocks

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This commit is contained in:
Bassem Girgis
2018-10-17 11:12:34 -05:00
parent a5ec64177d
commit 63027dd857
8 changed files with 623 additions and 80 deletions
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139
trylock.c
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@@ -24,31 +24,27 @@ time_t end_time;
* Thread start routine that repeatedly locks a mutex and
* increments a counter.
*/
void *counter_thread (void *arg)
{
int status;
int spin;
void *counter_thread(void *arg) {
int status;
int spin;
/*
* Until end_time, increment the counter each
* second. Instead of just incrementing the counter, it
* sleeps for another second with the mutex locked, to give
* monitor_thread a reasonable chance of running.
*/
while (time (NULL) < end_time)
{
status = pthread_mutex_lock (&mutex);
if (status != 0)
err_abort (status, "Lock mutex");
for (spin = 0; spin < SPIN; spin++)
counter++;
status = pthread_mutex_unlock (&mutex);
if (status != 0)
err_abort (status, "Unlock mutex");
sleep (1);
}
printf ("Counter is %#lx\n", counter);
return NULL;
/*
* Until end_time, increment the counter each
* second. Instead of just incrementing the counter, it
* sleeps for another second with the mutex locked, to give
* monitor_thread a reasonable chance of running.
*/
while (time(NULL) < end_time) {
status = pthread_mutex_lock(&mutex);
if (status != 0) err_abort(status, "Lock mutex");
for (spin = 0; spin < SPIN; spin++) counter++;
sleep(4);
status = pthread_mutex_unlock(&mutex);
if (status != 0) err_abort(status, "Unlock mutex");
sleep(1);
}
printf("Counter is %#lx\n", counter);
return NULL;
}
/*
@@ -56,65 +52,52 @@ void *counter_thread (void *arg)
* seconds, try to lock the mutex and read the counter. If the
* trylock fails, skip this cycle.
*/
void *monitor_thread (void *arg)
{
int status;
int misses = 0;
void *monitor_thread(void *arg) {
int status;
int misses = 0;
/*
* Loop until end_time, checking the counter every 3
* seconds.
*/
while (time (NULL) < end_time)
{
sleep (3);
status = pthread_mutex_trylock (&mutex);
if (status != EBUSY)
{
if (status != 0)
err_abort (status, "Trylock mutex");
printf ("Counter is %ld\n", counter/SPIN);
status = pthread_mutex_unlock (&mutex);
if (status != 0)
err_abort (status, "Unlock mutex");
} else
misses++; /* Count "misses" on the lock */
}
printf ("Monitor thread missed update %d times.\n", misses);
return NULL;
/*
* Loop until end_time, checking the counter every 3
* seconds.
*/
while (time(NULL) < end_time) {
sleep(3);
status = pthread_mutex_trylock(&mutex);
if (status != EBUSY) {
if (status != 0) err_abort(status, "Trylock mutex");
printf("Counter is %ld\n", counter / SPIN);
status = pthread_mutex_unlock(&mutex);
if (status != 0) err_abort(status, "Unlock mutex");
} else
misses++; /* Count "misses" on the lock */
}
printf("Monitor thread missed update %d times.\n", misses);
return NULL;
}
int main (int argc, char *argv[])
{
int status;
pthread_t counter_thread_id;
pthread_t monitor_thread_id;
int main(int argc, char *argv[]) {
int status;
pthread_t counter_thread_id;
pthread_t monitor_thread_id;
#ifdef sun
/*
* On Solaris 2.5, threads are not timesliced. To ensure
* that our threads can run concurrently, we need to
* increase the concurrency level to 2.
*/
DPRINTF (("Setting concurrency level to 2\n"));
thr_setconcurrency (2);
/*
* On Solaris 2.5, threads are not timesliced. To ensure
* that our threads can run concurrently, we need to
* increase the concurrency level to 2.
*/
DPRINTF(("Setting concurrency level to 2\n"));
thr_setconcurrency(2);
#endif
end_time = time (NULL) + 60; /* Run for 1 minute */
status = pthread_create (
&counter_thread_id, NULL, counter_thread, NULL);
if (status != 0)
err_abort (status, "Create counter thread");
status = pthread_create (
&monitor_thread_id, NULL, monitor_thread, NULL);
if (status != 0)
err_abort (status, "Create monitor thread");
status = pthread_join (counter_thread_id, NULL);
if (status != 0)
err_abort (status, "Join counter thread");
status = pthread_join (monitor_thread_id, NULL);
if (status != 0)
err_abort (status, "Join monitor thread");
return 0;
end_time = time(NULL) + 60; /* Run for 1 minute */
status = pthread_create(&counter_thread_id, NULL, counter_thread, NULL);
if (status != 0) err_abort(status, "Create counter thread");
status = pthread_create(&monitor_thread_id, NULL, monitor_thread, NULL);
if (status != 0) err_abort(status, "Create monitor thread");
status = pthread_join(counter_thread_id, NULL);
if (status != 0) err_abort(status, "Join counter thread");
status = pthread_join(monitor_thread_id, NULL);
if (status != 0) err_abort(status, "Join monitor thread");
return 0;
}