tests/thread-test.c

   1 #undef G_DISABLE_ASSERT
   2 #undef G_LOG_DOMAIN
   3
   4 #include <glib.h>
   5
   6 /* GMutex */
   7
   8 static GMutex* test_g_mutex_mutex = NULL;
   9 static guint test_g_mutex_int = 0;
  10 static gboolean test_g_mutex_thread_ready;
  11 G_LOCK_DEFINE_STATIC (test_g_mutex);
  12
  13 static gpointer
  14 test_g_mutex_thread (gpointer data)
  15 {
  16   g_assert (GPOINTER_TO_INT (data) == 42);
  17   g_assert (g_mutex_trylock (test_g_mutex_mutex) == FALSE);
  18   g_assert (G_TRYLOCK (test_g_mutex) == FALSE);
  19   test_g_mutex_thread_ready = TRUE;
  20   g_mutex_lock (test_g_mutex_mutex);
  21   g_assert (test_g_mutex_int == 42);
  22   g_mutex_unlock (test_g_mutex_mutex);
  23
  24   return GINT_TO_POINTER (41);
  25 }
  26
  27 static void
  28 test_g_mutex (void)
  29 {
  30   GThread *thread;
  31   test_g_mutex_mutex = g_mutex_new ();
  32
  33   g_assert (g_mutex_trylock (test_g_mutex_mutex));
  34   g_assert (G_TRYLOCK (test_g_mutex));
  35   test_g_mutex_thread_ready = FALSE;
  36   thread = g_thread_create (test_g_mutex_thread, GINT_TO_POINTER (42),
  37                             TRUE, NULL);
  38   /* This busy wait is only for testing purposes and not an example of
  39    * good code!*/
  40   while (!test_g_mutex_thread_ready)
  41     g_usleep (G_USEC_PER_SEC / 5);
  42   test_g_mutex_int = 42;
  43   G_UNLOCK (test_g_mutex);
  44   g_mutex_unlock (test_g_mutex_mutex);
  45   g_assert (GPOINTER_TO_INT (g_thread_join (thread)) == 41);
  46   g_mutex_free (test_g_mutex_mutex);
  47 }
  48
  49 /* GStaticRecMutex */
  50
  51 static GStaticRecMutex test_g_static_rec_mutex_mutex = G_STATIC_REC_MUTEX_INIT;
  52 static guint test_g_static_rec_mutex_int = 0;
  53 static gboolean test_g_static_rec_mutex_thread_ready;
  54
  55 static gpointer
  56 test_g_static_rec_mutex_thread (gpointer data)
  57 {
  58   g_assert (GPOINTER_TO_INT (data) == 42);
  59   g_assert (g_static_rec_mutex_trylock (&test_g_static_rec_mutex_mutex)
  60             == FALSE);
  61   test_g_static_rec_mutex_thread_ready = TRUE;
  62   g_static_rec_mutex_lock (&test_g_static_rec_mutex_mutex);
  63   g_static_rec_mutex_lock (&test_g_static_rec_mutex_mutex);
  64   g_assert (test_g_static_rec_mutex_int == 42);
  65   test_g_static_rec_mutex_thread_ready = FALSE;
  66   g_static_rec_mutex_unlock (&test_g_static_rec_mutex_mutex);
  67   g_static_rec_mutex_unlock (&test_g_static_rec_mutex_mutex);
  68
  69   g_thread_exit (GINT_TO_POINTER (43));
  70
  71   g_assert_not_reached ();
  72   return NULL;
  73 }
  74
  75 static void
  76 test_g_static_rec_mutex (void)
  77 {
  78   GThread *thread;
  79
  80   g_assert (g_static_rec_mutex_trylock (&test_g_static_rec_mutex_mutex));
  81   test_g_static_rec_mutex_thread_ready = FALSE;
  82   thread = g_thread_create (test_g_static_rec_mutex_thread,
  83                             GINT_TO_POINTER (42), TRUE, NULL);
  84   /* This busy wait is only for testing purposes and not an example of
  85    * good code!*/
  86   while (!test_g_static_rec_mutex_thread_ready)
  87     g_usleep (G_USEC_PER_SEC / 5);
  88
  89   g_assert (g_static_rec_mutex_trylock (&test_g_static_rec_mutex_mutex));
  90   test_g_static_rec_mutex_int = 41;
  91   g_static_rec_mutex_unlock (&test_g_static_rec_mutex_mutex);
  92   test_g_static_rec_mutex_int = 42;
  93   g_static_rec_mutex_unlock (&test_g_static_rec_mutex_mutex);
  94
  95   /* This busy wait is only for testing purposes and not an example of
  96    * good code!*/
  97   while (test_g_static_rec_mutex_thread_ready)
  98     g_usleep (G_USEC_PER_SEC / 5);
  99
 100   g_static_rec_mutex_lock (&test_g_static_rec_mutex_mutex);
 101   test_g_static_rec_mutex_int = 0;
 102   g_static_rec_mutex_unlock (&test_g_static_rec_mutex_mutex);
 103
 104   g_assert (GPOINTER_TO_INT (g_thread_join (thread)) == 43);
 105 }
 106
 107 /* GStaticPrivate */
 108
 109 #define THREADS 10
 110
 111 static GStaticPrivate test_g_static_private_private1 = G_STATIC_PRIVATE_INIT;
 112 static GStaticPrivate test_g_static_private_private2 = G_STATIC_PRIVATE_INIT;
 113 static GStaticMutex test_g_static_private_mutex = G_STATIC_MUTEX_INIT;
 114 static guint test_g_static_private_counter = 0;
 115 static guint test_g_static_private_ready = 0;
 116
 117 static gpointer
 118 test_g_static_private_constructor (void)
 119 {
 120   g_static_mutex_lock (&test_g_static_private_mutex);
 121   test_g_static_private_counter++;
 122   g_static_mutex_unlock (&test_g_static_private_mutex);
 123   return g_new (guint,1);
 124 }
 125
 126 static void
 127 test_g_static_private_destructor (gpointer data)
 128 {
 129   g_static_mutex_lock (&test_g_static_private_mutex);
 130   test_g_static_private_counter--;
 131   g_static_mutex_unlock (&test_g_static_private_mutex);
 132   g_free (data);
 133 }
 134
 135
 136 static gpointer
 137 test_g_static_private_thread (gpointer data)
 138 {
 139   guint number = GPOINTER_TO_INT (data);
 140   guint i;
 141   guint *private1, *private2;
 142   for (i = 0; i < 10; i++)
 143     {
 144       number = number * 11 + 1; /* A very simple and bad RNG ;-) */
 145       private1 = g_static_private_get (&test_g_static_private_private1);
 146       if (!private1 || number % 7 > 3)
 147         {
 148           private1 = test_g_static_private_constructor ();
 149           g_static_private_set (&test_g_static_private_private1, private1,
 150                                 test_g_static_private_destructor);
 151         }
 152       *private1 = number;
 153       private2 = g_static_private_get (&test_g_static_private_private2);
 154       if (!private2 || number % 13 > 5)
 155         {
 156           private2 = test_g_static_private_constructor ();
 157           g_static_private_set (&test_g_static_private_private2, private2,
 158                                 test_g_static_private_destructor);
 159         }
 160       *private2 = number * 2;
 161       g_usleep (G_USEC_PER_SEC / 5);
 162       g_assert (number == *private1);
 163       g_assert (number * 2 == *private2);
 164     }
 165   g_static_mutex_lock (&test_g_static_private_mutex);
 166   test_g_static_private_ready++;
 167   g_static_mutex_unlock (&test_g_static_private_mutex);
 168
 169   /* Busy wait is not nice but that's just a test */
 170   while (test_g_static_private_ready != 0)
 171     g_usleep (G_USEC_PER_SEC / 5);
 172
 173   for (i = 0; i < 10; i++)
 174     {
 175       private2 = g_static_private_get (&test_g_static_private_private2);
 176       number = number * 11 + 1; /* A very simple and bad RNG ;-) */
 177       if (!private2 || number % 13 > 5)
 178         {
 179           private2 = test_g_static_private_constructor ();
 180           g_static_private_set (&test_g_static_private_private2, private2,
 181                                 test_g_static_private_destructor);
 182         }
 183       *private2 = number * 2;
 184       g_usleep (G_USEC_PER_SEC / 5);
 185       g_assert (number * 2 == *private2);
 186     }
 187
 188   return GINT_TO_POINTER (GPOINTER_TO_INT (data) * 3);
 189 }
 190
 191 static void
 192 test_g_static_private (void)
 193 {
 194   GThread *threads[THREADS];
 195   guint i;
 196
 197   test_g_static_private_ready = 0;
 198
 199   for (i = 0; i < THREADS; i++)
 200     {
 201       threads[i] = g_thread_create (test_g_static_private_thread,
 202                                     GINT_TO_POINTER (i), TRUE, NULL);
 203     }
 204
 205   /* Busy wait is not nice but that's just a test */
 206   while (test_g_static_private_ready != THREADS)
 207     g_usleep (G_USEC_PER_SEC / 5);
 208
 209   /* Reuse the static private */
 210   g_static_private_free (&test_g_static_private_private2);
 211   g_static_private_init (&test_g_static_private_private2);
 212
 213   test_g_static_private_ready = 0;
 214
 215   for (i = 0; i < THREADS; i++)
 216     g_assert (GPOINTER_TO_INT (g_thread_join (threads[i])) == i * 3);
 217
 218   g_assert (test_g_static_private_counter == 0);
 219 }
 220
 221 /* GStaticRWLock */
 222
 223 /* -1 = writing; >0 = # of readers */
 224 static gint test_g_static_rw_lock_state = 0;
 225 G_LOCK_DEFINE (test_g_static_rw_lock_state);
 226
 227 static gboolean test_g_static_rw_lock_run = TRUE;
 228 static GStaticRWLock test_g_static_rw_lock_lock = G_STATIC_RW_LOCK_INIT;
 229
 230 static gpointer
 231 test_g_static_rw_lock_thread (gpointer data)
 232 {
 233   while (test_g_static_rw_lock_run)
 234     {
 235       if (g_random_double() > .2) /* I'm a reader */
 236         {
 237
 238           if (g_random_double() > .2) /* I'll block */
 239             g_static_rw_lock_reader_lock (&test_g_static_rw_lock_lock);
 240           else /* I'll only try */
 241             if (!g_static_rw_lock_reader_trylock (&test_g_static_rw_lock_lock))
 242               continue;
 243           G_LOCK (test_g_static_rw_lock_state);
 244           g_assert (test_g_static_rw_lock_state >= 0);
 245           test_g_static_rw_lock_state++;
 246           G_UNLOCK (test_g_static_rw_lock_state);
 247
 248           g_usleep (g_random_int_range (20,1000));
 249
 250           G_LOCK (test_g_static_rw_lock_state);
 251           test_g_static_rw_lock_state--;
 252           G_UNLOCK (test_g_static_rw_lock_state);
 253
 254           g_static_rw_lock_reader_unlock (&test_g_static_rw_lock_lock);
 255         }
 256       else /* I'm a writer */
 257         {
 258
 259           if (g_random_double() > .2) /* I'll block */
 260             g_static_rw_lock_writer_lock (&test_g_static_rw_lock_lock);
 261           else /* I'll only try */
 262             if (!g_static_rw_lock_writer_trylock (&test_g_static_rw_lock_lock))
 263               continue;
 264           G_LOCK (test_g_static_rw_lock_state);
 265           g_assert (test_g_static_rw_lock_state == 0);
 266           test_g_static_rw_lock_state = -1;
 267           G_UNLOCK (test_g_static_rw_lock_state);
 268
 269           g_usleep (g_random_int_range (20,1000));
 270
 271           G_LOCK (test_g_static_rw_lock_state);
 272           test_g_static_rw_lock_state = 0;
 273           G_UNLOCK (test_g_static_rw_lock_state);
 274
 275           g_static_rw_lock_writer_unlock (&test_g_static_rw_lock_lock);
 276         }
 277     }
 278   return NULL;
 279 }
 280
 281 static void
 282 test_g_static_rw_lock ()
 283 {
 284   GThread *threads[THREADS];
 285   guint i;
 286   for (i = 0; i < THREADS; i++)
 287     {
 288       threads[i] = g_thread_create (test_g_static_rw_lock_thread,
 289                                     NULL, TRUE, NULL);
 290     }
 291   g_usleep (G_USEC_PER_SEC * 5);
 292   test_g_static_rw_lock_run = FALSE;
 293   for (i = 0; i < THREADS; i++)
 294     {
 295       g_thread_join (threads[i]);
 296     }
 297   g_assert (test_g_static_rw_lock_state == 0);
 298 }
 299
 300 #define G_ONCE_SIZE 100
 301 #define G_ONCE_THREADS 10
 302
 303 G_LOCK_DEFINE (test_g_once);
 304 static guint test_g_once_guint_array[G_ONCE_SIZE];
 305 static GOnce test_g_once_array[G_ONCE_SIZE];
 306
 307 static gpointer
 308 test_g_once_init_func(gpointer arg)
 309 {
 310   guint *count = arg;
 311   g_usleep (g_random_int_range (20,1000));
 312   (*count)++;
 313   g_usleep (g_random_int_range (20,1000));
 314   return arg;
 315 }
 316
 317 static gpointer
 318 test_g_once_thread (gpointer ignore)
 319 {
 320   guint i;
 321   G_LOCK (test_g_once);
 322   /* Don't start before all threads are created */
 323   G_UNLOCK (test_g_once);
 324   for (i = 0; i < 1000; i++)
 325     {
 326       guint pos = g_random_int_range (0, G_ONCE_SIZE);
 327       gpointer ret = g_once (test_g_once_array + pos, test_g_once_init_func,
 328                              test_g_once_guint_array + pos);
 329       g_assert (ret == test_g_once_guint_array + pos);
 330     }
 331
 332   /* Make sure, that all counters are touched at least once */
 333   for (i = 0; i < G_ONCE_SIZE; i++)
 334     {
 335       gpointer ret = g_once (test_g_once_array + i, test_g_once_init_func,
 336                              test_g_once_guint_array + i);
 337       g_assert (ret == test_g_once_guint_array + i);
 338     }
 339
 340   return NULL;
 341 }
 342
 343 static void
 344 test_g_thread_once (void)
 345 {
 346   static GOnce once_init = G_ONCE_INIT;
 347   GThread *threads[G_ONCE_THREADS];
 348   guint i;
 349   for (i = 0; i < G_ONCE_SIZE; i++)
 350     {
 351       test_g_once_array[i] = once_init;
 352       test_g_once_guint_array[i] = i;
 353     }
 354   G_LOCK (test_g_once);
 355   for (i = 0; i < G_ONCE_THREADS; i++)
 356     {
 357       threads[i] = g_thread_create (test_g_once_thread, GUINT_TO_POINTER(i%2),
 358                                     TRUE, NULL);
 359     }
 360   G_UNLOCK (test_g_once);
 361   for (i = 0; i < G_ONCE_THREADS; i++)
 362     {
 363       g_thread_join (threads[i]);
 364     }
 365
 366   for (i = 0; i < G_ONCE_SIZE; i++)
 367     {
 368       g_assert (test_g_once_guint_array[i] == i + 1);
 369     }
 370 }
 371
 372 /* run all the tests */
 373 void
 374 run_all_tests()
 375 {
 376   test_g_mutex ();
 377   g_print (".");
 378   test_g_static_rec_mutex ();
 379   g_print (".");
 380   test_g_static_private ();
 381   g_print (".");
 382   test_g_static_rw_lock ();
 383   g_print (".");
 384   test_g_thread_once ();
 385   g_print (".");
 386 }
 387
 388 int
 389 main (int   argc,
 390       char *argv[])
 391 {
 392   /* Only run the test, if threads are enabled and a default thread
 393      implementation is available */
 394 #if defined(G_THREADS_ENABLED) && ! defined(G_THREADS_IMPL_NONE)
 395   g_thread_init (NULL);
 396   run_all_tests ();
 397
 398   /* Now we rerun all tests, but this time we fool the system into
 399    * thinking, that the available thread system is not native, but
 400    * userprovided. */
 401
 402   g_thread_use_default_impl = FALSE;
 403   run_all_tests ();
 404   g_print ("\n");
 405
 406 #endif
 407   return 0;
 408 }