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#include <roy.h>
#define NUM_THREADS 5
RThreadMutex some_global_mtx;
static int some_global = 0;
RThreadMutex another_global_mtx;
static int another_global = 0;
RThreadMutex printf_mtx;
#define USE_THREADS 1
/* Total hackery to get it so we can test speed of non-threaded
* version. */
#if !USE_THREADS
#undef RTHREAD_MUTEX_ENTER
#define RTHREAD_MUTEX_ENTER(mutex) do
#undef RTHREAD_MUTEX_EXIT
#define RTHREAD_MUTEX_EXIT(mutex) while (0)
#endif
static void *
mutex_test (void *data)
{
long tid = (long) data;
int a, t, i = 0;
int tmp;
for (a = 0; a < 1000; a++) {
for (t = 0; t < 100000; t++) {
i++;
}
RTHREAD_MUTEX_ENTER (some_global_mtx) {
tmp = some_global;
tmp++;
some_global = tmp;
} RTHREAD_MUTEX_EXIT (some_global_mtx);
#if USE_THREADS
rthread_mutex_lock (another_global_mtx);
#endif
tmp = another_global;
tmp++;
another_global = tmp;
#if USE_THREADS
rthread_mutex_unlock (another_global_mtx);
#endif
rthread_yield_if_coop ();
}
RTHREAD_MUTEX_ENTER (printf_mtx) {
printf ("-- thread %ld: %d iterations, some_global: %d\n", tid, i, some_global);
} RTHREAD_MUTEX_EXIT (printf_mtx);
return ((void *) tid);
}
RThreadEvent test_event;
RThreadEvent test_event_noauto;
void *
event_test (void *data)
{
long tid = (long) data;
int i;
for (i = 0; i < 2; i++) {
printf ("-- thread %ld waiting for event\n", tid);
rthread_event_wait (test_event);
printf ("-- thread %ld released on iteration %d\n", tid, i);
}
printf ("-- thread %ld waiting at manual gate..\n", tid);
rthread_event_wait (test_event_noauto);
printf ("-- thread %ld exiting..\n", tid);
return ((void *) tid);
}
int
main (int argc, char *argv[])
{
long t;
int i;
#if USE_THREADS
RThread *thread[NUM_THREADS];
rinit_threaded ();
some_global_mtx = rthread_mutex_new ();
another_global_mtx = rthread_mutex_new ();
printf_mtx = rthread_mutex_new ();
for (t = 0; t < NUM_THREADS; t++) {
printf ("Creating thread %ld\n", t);
thread[t] = rthread_create (mutex_test, (void *) t);
if (rthread_err (thread[t])) {
printf ("error creating thread: %s\n", rthread_strerror (thread[t]));
rthread_free (thread[t]);
goto max_reached;
}
}
max_reached:
/* Make sure all the threads exit before we do.. */
for (--t; t >= 0; t--) {
void *data;
rthread_waitfor (thread[t], &data);
printf ("thread %ld exited\n", (long) data);
rthread_free (thread[t]);
}
rthread_mutex_destroy (some_global_mtx);
rthread_mutex_destroy (another_global_mtx);
test_event = rthread_event_new (TRUE);
test_event_noauto = rthread_event_new (FALSE);
for (t = 0; t < NUM_THREADS; t++) {
printf ("Creating thread %ld\n", t);
thread[t] = rthread_create (event_test, (void *) (long) t);
if (rthread_err (thread[t])) {
printf ("error creating thread: %s\n", rthread_strerror (thread[t]));
rthread_free (thread[t]);
goto max_reached;
}
}
rthread_yield_if_coop ();
/* Really this is wrong, we are doing this to wait for
* the threads to hit the rthread_event_wait () above
* cause if we set the event before they get there, the message
* will be missed and they won't fall through.
* However, this is just a test so it's ok, and it allows
* us to test behavior on that as well. */
for (i = 0; i < 1000000000; i++);
rthread_yield_if_coop ();
for (i = 0; i < NUM_THREADS * 2; i++) {
printf ("Calling rthread_event_set ()\n");
rthread_event_set (test_event);
printf ("done.\n");
}
for (i = 0; i < 1000000000; i++);
printf ("Letting all threads through manual gate.\n");
rthread_event_set (test_event_noauto);
for (--t; t >= 0; t--) {
void *data;
rthread_waitfor (thread[t], &data);
printf ("thread %ld exited\n", (long) data);
rthread_free (thread[t]);
}
rthread_event_destroy (test_event);
rthread_event_destroy (test_event_noauto);
#else
rinit ();
for (t = 0; t < NUM_THREADS; t++) {
mutex_test ((void *) t);
}
#endif
printf ("global is %d\n", some_global);
return (0);
}
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