Increase the timeout for some GLib tests
[glib.git] / glib / tests / mutex.c
blob14e83cf69a8945980398b0469b9d049bfe506620
1 /* Unit tests for GMutex
2 * Copyright (C) 2011 Red Hat, Inc
3 * Author: Matthias Clasen
5 * This work is provided "as is"; redistribution and modification
6 * in whole or in part, in any medium, physical or electronic is
7 * permitted without restriction.
9 * This work is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * In no event shall the authors or contributors be liable for any
14 * direct, indirect, incidental, special, exemplary, or consequential
15 * damages (including, but not limited to, procurement of substitute
16 * goods or services; loss of use, data, or profits; or business
17 * interruption) however caused and on any theory of liability, whether
18 * in contract, strict liability, or tort (including negligence or
19 * otherwise) arising in any way out of the use of this software, even
20 * if advised of the possibility of such damage.
23 /* We are testing some deprecated APIs here */
24 #define GLIB_DISABLE_DEPRECATION_WARNINGS
26 #include <glib.h>
28 #include <stdio.h>
30 static void
31 test_mutex1 (void)
33 GMutex mutex;
35 g_mutex_init (&mutex);
36 g_mutex_lock (&mutex);
37 g_mutex_unlock (&mutex);
38 g_mutex_lock (&mutex);
39 g_mutex_unlock (&mutex);
40 g_mutex_clear (&mutex);
43 static void
44 test_mutex2 (void)
46 static GMutex mutex;
48 g_mutex_lock (&mutex);
49 g_mutex_unlock (&mutex);
50 g_mutex_lock (&mutex);
51 g_mutex_unlock (&mutex);
54 static void
55 test_mutex3 (void)
57 GMutex *mutex;
59 mutex = g_mutex_new ();
60 g_mutex_lock (mutex);
61 g_mutex_unlock (mutex);
62 g_mutex_lock (mutex);
63 g_mutex_unlock (mutex);
64 g_mutex_free (mutex);
67 static void
68 test_mutex4 (void)
70 static GMutex mutex;
71 gboolean ret;
73 ret = g_mutex_trylock (&mutex);
74 g_assert (ret);
76 /* no guarantees that mutex is recursive, so could return 0 or 1 */
77 if (g_mutex_trylock (&mutex))
78 g_mutex_unlock (&mutex);
80 g_mutex_unlock (&mutex);
83 #define LOCKS 48
84 #define ITERATIONS 10000
85 #define THREADS 100
88 GThread *owners[LOCKS];
89 GMutex locks[LOCKS];
91 static void
92 acquire (gint nr)
94 GThread *self;
96 self = g_thread_self ();
98 if (!g_mutex_trylock (&locks[nr]))
100 if (g_test_verbose ())
101 g_printerr ("thread %p going to block on lock %d\n", self, nr);
103 g_mutex_lock (&locks[nr]);
106 g_assert (owners[nr] == NULL); /* hopefully nobody else is here */
107 owners[nr] = self;
109 /* let some other threads try to ruin our day */
110 g_thread_yield ();
111 g_thread_yield ();
112 g_thread_yield ();
114 g_assert (owners[nr] == self); /* hopefully this is still us... */
115 owners[nr] = NULL; /* make way for the next guy */
117 g_mutex_unlock (&locks[nr]);
120 static gpointer
121 thread_func (gpointer data)
123 gint i;
124 GRand *rand;
126 rand = g_rand_new ();
128 for (i = 0; i < ITERATIONS; i++)
129 acquire (g_rand_int_range (rand, 0, LOCKS));
131 g_rand_free (rand);
133 return NULL;
136 static void
137 test_mutex5 (void)
139 gint i;
140 GThread *threads[THREADS];
142 for (i = 0; i < LOCKS; i++)
143 g_mutex_init (&locks[i]);
145 for (i = 0; i < THREADS; i++)
146 threads[i] = g_thread_create (thread_func, NULL, TRUE, NULL);
148 for (i = 0; i < THREADS; i++)
149 g_thread_join (threads[i]);
151 for (i = 0; i < LOCKS; i++)
152 g_mutex_clear (&locks[i]);
154 for (i = 0; i < LOCKS; i++)
155 g_assert (owners[i] == NULL);
158 #define COUNT_TO 100000000
160 static gboolean
161 do_addition (gint *value)
163 static GMutex lock;
164 gboolean more;
166 /* test performance of "good" cases (ie: short critical sections) */
167 g_mutex_lock (&lock);
168 if ((more = *value != COUNT_TO))
169 if (*value != -1)
170 (*value)++;
171 g_mutex_unlock (&lock);
173 return more;
176 static gpointer
177 addition_thread (gpointer value)
179 while (do_addition (value));
181 return NULL;
184 static void
185 test_mutex_perf (gconstpointer data)
187 gint n_threads = GPOINTER_TO_INT (data);
188 GThread *threads[THREADS];
189 gint64 start_time;
190 gdouble rate;
191 gint x = -1;
192 gint i;
194 for (i = 0; i < n_threads - 1; i++)
195 threads[i] = g_thread_create (addition_thread, &x, TRUE, NULL);
197 /* avoid measuring thread setup/teardown time */
198 start_time = g_get_monotonic_time ();
199 g_atomic_int_set (&x, 0);
200 addition_thread (&x);
201 g_assert_cmpint (g_atomic_int_get (&x), ==, COUNT_TO);
202 rate = g_get_monotonic_time () - start_time;
203 rate = x / rate;
205 for (i = 0; i < n_threads - 1; i++)
206 g_thread_join (threads[i]);
208 g_test_maximized_result (rate, "%f mips", rate);
212 main (int argc, char *argv[])
214 g_test_init (&argc, &argv, NULL);
216 g_test_add_func ("/thread/mutex1", test_mutex1);
217 g_test_add_func ("/thread/mutex2", test_mutex2);
218 g_test_add_func ("/thread/mutex3", test_mutex3);
219 g_test_add_func ("/thread/mutex4", test_mutex4);
220 g_test_add_func ("/thread/mutex5", test_mutex5);
222 if (g_test_perf ())
224 gint i;
226 g_test_add_data_func ("/thread/mutex/perf/uncontended", NULL, test_mutex_perf);
228 for (i = 1; i <= 10; i++)
230 gchar name[80];
231 sprintf (name, "/thread/mutex/perf/contended/%d", i);
232 g_test_add_data_func (name, GINT_TO_POINTER (i), test_mutex_perf);
236 return g_test_run ();