blob: 14e83cf69a8945980398b0469b9d049bfe506620 [file] [log] [blame]
/* Unit tests for GMutex
* Copyright (C) 2011 Red Hat, Inc
* Author: Matthias Clasen
*
* This work is provided "as is"; redistribution and modification
* in whole or in part, in any medium, physical or electronic is
* permitted without restriction.
*
* This work is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* In no event shall the authors or contributors be liable for any
* direct, indirect, incidental, special, exemplary, or consequential
* damages (including, but not limited to, procurement of substitute
* goods or services; loss of use, data, or profits; or business
* interruption) however caused and on any theory of liability, whether
* in contract, strict liability, or tort (including negligence or
* otherwise) arising in any way out of the use of this software, even
* if advised of the possibility of such damage.
*/
/* We are testing some deprecated APIs here */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include <glib.h>
#include <stdio.h>
static void
test_mutex1 (void)
{
GMutex mutex;
g_mutex_init (&mutex);
g_mutex_lock (&mutex);
g_mutex_unlock (&mutex);
g_mutex_lock (&mutex);
g_mutex_unlock (&mutex);
g_mutex_clear (&mutex);
}
static void
test_mutex2 (void)
{
static GMutex mutex;
g_mutex_lock (&mutex);
g_mutex_unlock (&mutex);
g_mutex_lock (&mutex);
g_mutex_unlock (&mutex);
}
static void
test_mutex3 (void)
{
GMutex *mutex;
mutex = g_mutex_new ();
g_mutex_lock (mutex);
g_mutex_unlock (mutex);
g_mutex_lock (mutex);
g_mutex_unlock (mutex);
g_mutex_free (mutex);
}
static void
test_mutex4 (void)
{
static GMutex mutex;
gboolean ret;
ret = g_mutex_trylock (&mutex);
g_assert (ret);
/* no guarantees that mutex is recursive, so could return 0 or 1 */
if (g_mutex_trylock (&mutex))
g_mutex_unlock (&mutex);
g_mutex_unlock (&mutex);
}
#define LOCKS 48
#define ITERATIONS 10000
#define THREADS 100
GThread *owners[LOCKS];
GMutex locks[LOCKS];
static void
acquire (gint nr)
{
GThread *self;
self = g_thread_self ();
if (!g_mutex_trylock (&locks[nr]))
{
if (g_test_verbose ())
g_printerr ("thread %p going to block on lock %d\n", self, nr);
g_mutex_lock (&locks[nr]);
}
g_assert (owners[nr] == NULL); /* hopefully nobody else is here */
owners[nr] = self;
/* let some other threads try to ruin our day */
g_thread_yield ();
g_thread_yield ();
g_thread_yield ();
g_assert (owners[nr] == self); /* hopefully this is still us... */
owners[nr] = NULL; /* make way for the next guy */
g_mutex_unlock (&locks[nr]);
}
static gpointer
thread_func (gpointer data)
{
gint i;
GRand *rand;
rand = g_rand_new ();
for (i = 0; i < ITERATIONS; i++)
acquire (g_rand_int_range (rand, 0, LOCKS));
g_rand_free (rand);
return NULL;
}
static void
test_mutex5 (void)
{
gint i;
GThread *threads[THREADS];
for (i = 0; i < LOCKS; i++)
g_mutex_init (&locks[i]);
for (i = 0; i < THREADS; i++)
threads[i] = g_thread_create (thread_func, NULL, TRUE, NULL);
for (i = 0; i < THREADS; i++)
g_thread_join (threads[i]);
for (i = 0; i < LOCKS; i++)
g_mutex_clear (&locks[i]);
for (i = 0; i < LOCKS; i++)
g_assert (owners[i] == NULL);
}
#define COUNT_TO 100000000
static gboolean
do_addition (gint *value)
{
static GMutex lock;
gboolean more;
/* test performance of "good" cases (ie: short critical sections) */
g_mutex_lock (&lock);
if ((more = *value != COUNT_TO))
if (*value != -1)
(*value)++;
g_mutex_unlock (&lock);
return more;
}
static gpointer
addition_thread (gpointer value)
{
while (do_addition (value));
return NULL;
}
static void
test_mutex_perf (gconstpointer data)
{
gint n_threads = GPOINTER_TO_INT (data);
GThread *threads[THREADS];
gint64 start_time;
gdouble rate;
gint x = -1;
gint i;
for (i = 0; i < n_threads - 1; i++)
threads[i] = g_thread_create (addition_thread, &x, TRUE, NULL);
/* avoid measuring thread setup/teardown time */
start_time = g_get_monotonic_time ();
g_atomic_int_set (&x, 0);
addition_thread (&x);
g_assert_cmpint (g_atomic_int_get (&x), ==, COUNT_TO);
rate = g_get_monotonic_time () - start_time;
rate = x / rate;
for (i = 0; i < n_threads - 1; i++)
g_thread_join (threads[i]);
g_test_maximized_result (rate, "%f mips", rate);
}
int
main (int argc, char *argv[])
{
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/thread/mutex1", test_mutex1);
g_test_add_func ("/thread/mutex2", test_mutex2);
g_test_add_func ("/thread/mutex3", test_mutex3);
g_test_add_func ("/thread/mutex4", test_mutex4);
g_test_add_func ("/thread/mutex5", test_mutex5);
if (g_test_perf ())
{
gint i;
g_test_add_data_func ("/thread/mutex/perf/uncontended", NULL, test_mutex_perf);
for (i = 1; i <= 10; i++)
{
gchar name[80];
sprintf (name, "/thread/mutex/perf/contended/%d", i);
g_test_add_data_func (name, GINT_TO_POINTER (i), test_mutex_perf);
}
}
return g_test_run ();
}