tests/mainloop-test.c

   1 #undef G_DISABLE_ASSERT
   2 #undef G_LOG_DOMAIN
   3
   4 #include <errno.h>
   5 #include <glib.h>
   6 #ifdef G_OS_UNIX
   7 #include <unistd.h>
   8 #endif
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11
  12 #ifdef G_OS_WIN32
  13 #include <fcntl.h>              /* For _O_BINARY used by pipe() macro */
  14 #include <io.h>                 /* for _pipe() */
  15 #define pipe(fds) _pipe(fds, 4096, _O_BINARY)
  16 #endif
  17
  18 #define ITERS 10000
  19 #define INCREMENT 10
  20 #define NTHREADS 4
  21 #define NCRAWLERS 4
  22 #define CRAWLER_TIMEOUT_RANGE 40
  23 #define RECURSER_TIMEOUT 50
  24
  25 /* The partial ordering between the context array mutex and
  26  * crawler array mutex is that the crawler array mutex cannot
  27  * be locked while the context array mutex is locked
  28  */
  29 GPtrArray *context_array;
  30 GMutex *context_array_mutex;
  31 GCond *context_array_cond;
  32
  33 GMainLoop *main_loop;
  34
  35 G_LOCK_DEFINE_STATIC (crawler_array_lock);
  36 GPtrArray *crawler_array;
  37
  38 typedef struct _AddrData AddrData;
  39 typedef struct _TestData TestData;
  40
  41 struct _AddrData
  42 {
  43   GMainLoop *loop;
  44   GIOChannel *dest;
  45   gint count;
  46 };
  47
  48 struct _TestData
  49 {
  50   gint current_val;
  51   gint iters;
  52   GIOChannel *in;
  53 };
  54
  55 static void cleanup_crawlers (GMainContext *context);
  56
  57 gboolean
  58 read_all (GIOChannel *channel, char *buf, gsize len)
  59 {
  60   gsize bytes_read = 0;
  61   gsize count;
  62   GIOError err;
  63
  64   while (bytes_read < len)
  65     {
  66       err = g_io_channel_read (channel, buf + bytes_read, len - bytes_read, &count);
  67       if (err)
  68         {
  69           if (err != G_IO_ERROR_AGAIN)
  70             return FALSE;
  71         }
  72       else if (count == 0)
  73         return FALSE;
  74
  75       bytes_read += count;
  76     }
  77
  78   return TRUE;
  79 }
  80
  81 gboolean
  82 write_all (GIOChannel *channel, char *buf, gsize len)
  83 {
  84   gsize bytes_written = 0;
  85   gsize count;
  86   GIOError err;
  87
  88   while (bytes_written < len)
  89     {
  90       err = g_io_channel_write (channel, buf + bytes_written, len - bytes_written, &count);
  91       if (err && err != G_IO_ERROR_AGAIN)
  92         return FALSE;
  93
  94       bytes_written += count;
  95     }
  96
  97   return TRUE;
  98 }
  99
 100 gboolean
 101 adder_callback (GIOChannel   *source,
 102                 GIOCondition  condition,
 103                 gpointer      data)
 104 {
 105   char buf1[32];
 106   char buf2[32];
 107
 108   char result[32];
 109
 110   AddrData *addr_data = data;
 111
 112   if (!read_all (source, buf1, 32) ||
 113       !read_all (source, buf2, 32))
 114     {
 115       g_main_loop_quit (addr_data->loop);
 116       return FALSE;
 117     }
 118
 119   sprintf (result, "%d", atoi(buf1) + atoi(buf2));
 120   write_all (addr_data->dest, result, 32);
 121
 122   return TRUE;
 123 }
 124
 125 gboolean
 126 timeout_callback (gpointer data)
 127 {
 128   AddrData *addr_data = data;
 129
 130   addr_data->count++;
 131
 132   return TRUE;
 133 }
 134
 135 gpointer
 136 adder_thread (gpointer data)
 137 {
 138   GMainContext *context;
 139   GSource *adder_source;
 140   GSource *timeout_source;
 141
 142   GIOChannel **channels = data;
 143   AddrData addr_data;
 144
 145   context = g_main_context_new ();
 146
 147   g_mutex_lock (context_array_mutex);
 148
 149   g_ptr_array_add (context_array, context);
 150
 151   if (context_array->len == NTHREADS)
 152     g_cond_broadcast (context_array_cond);
 153
 154   g_mutex_unlock (context_array_mutex);
 155
 156   addr_data.dest = channels[1];
 157   addr_data.loop = g_main_loop_new (context, FALSE);
 158   addr_data.count = 0;
 159
 160   adder_source = g_io_create_watch (channels[0], G_IO_IN | G_IO_HUP);
 161   g_source_set_callback (adder_source, (GSourceFunc)adder_callback, &addr_data, NULL);
 162   g_source_attach (adder_source, context);
 163   g_source_unref (adder_source);
 164
 165   timeout_source = g_timeout_source_new (10);
 166   g_source_set_callback (timeout_source, (GSourceFunc)timeout_callback, &addr_data, NULL);
 167   g_source_set_priority (timeout_source, G_PRIORITY_HIGH);
 168   g_source_attach (timeout_source, context);
 169   g_source_unref (timeout_source);
 170
 171   g_main_loop_run (addr_data.loop);
 172
 173   g_io_channel_unref (channels[0]);
 174   g_io_channel_unref (channels[1]);
 175
 176   g_free (channels);
 177
 178   g_main_loop_unref (addr_data.loop);
 179
 180 #ifdef VERBOSE
 181   g_print ("Timeout run %d times\n", addr_data.count);
 182 #endif
 183
 184   g_mutex_lock (context_array_mutex);
 185   g_ptr_array_remove (context_array, context);
 186   if (context_array->len == 0)
 187     g_main_loop_quit (main_loop);
 188   g_mutex_unlock (context_array_mutex);
 189
 190   cleanup_crawlers (context);
 191
 192   return NULL;
 193 }
 194
 195 void
 196 io_pipe (GIOChannel **channels)
 197 {
 198   gint fds[2];
 199
 200   if (pipe(fds) < 0)
 201     {
 202       g_warning ("Cannot create pipe %s\n", g_strerror (errno));
 203       exit (1);
 204     }
 205
 206   channels[0] = g_io_channel_unix_new (fds[0]);
 207   channels[1] = g_io_channel_unix_new (fds[1]);
 208
 209   g_io_channel_set_close_on_unref (channels[0], TRUE);
 210   g_io_channel_set_close_on_unref (channels[1], TRUE);
 211 }
 212
 213 void
 214 do_add (GIOChannel *in, gint a, gint b)
 215 {
 216   char buf1[32];
 217   char buf2[32];
 218
 219   sprintf (buf1, "%d", a);
 220   sprintf (buf2, "%d", b);
 221
 222   write_all (in, buf1, 32);
 223   write_all (in, buf2, 32);
 224 }
 225
 226 gboolean
 227 adder_response (GIOChannel   *source,
 228                 GIOCondition  condition,
 229                 gpointer      data)
 230 {
 231   char result[32];
 232   TestData *test_data = data;
 233
 234   if (!read_all (source, result, 32))
 235     return FALSE;
 236
 237   test_data->current_val = atoi (result);
 238   test_data->iters--;
 239
 240   if (test_data->iters == 0)
 241     {
 242       if (test_data->current_val != ITERS * INCREMENT)
 243         {
 244           g_print ("Addition failed: %d != %d\n",
 245                    test_data->current_val, ITERS * INCREMENT);
 246           exit (1);
 247         }
 248
 249       g_io_channel_unref (source);
 250       g_io_channel_unref (test_data->in);
 251
 252       g_free (test_data);
 253
 254       return FALSE;
 255     }
 256
 257   do_add (test_data->in, test_data->current_val, INCREMENT);
 258
 259   return TRUE;
 260 }
 261
 262 void
 263 create_adder_thread (void)
 264 {
 265   GError *err = NULL;
 266   TestData *test_data;
 267
 268   GIOChannel *in_channels[2];
 269   GIOChannel *out_channels[2];
 270
 271   GIOChannel **sub_channels;
 272
 273   sub_channels = g_new (GIOChannel *, 2);
 274
 275   io_pipe (in_channels);
 276   io_pipe (out_channels);
 277
 278   sub_channels[0] = in_channels[0];
 279   sub_channels[1] = out_channels[1];
 280
 281   g_thread_create (adder_thread, sub_channels, FALSE, &err);
 282
 283   if (err)
 284     {
 285       g_warning ("Cannot create thread: %s", err->message);
 286       exit (1);
 287     }
 288
 289   test_data = g_new (TestData, 1);
 290   test_data->in = in_channels[1];
 291   test_data->current_val = 0;
 292   test_data->iters = ITERS;
 293
 294   g_io_add_watch (out_channels[0], G_IO_IN | G_IO_HUP,
 295                   adder_response, test_data);
 296
 297   do_add (test_data->in, test_data->current_val, INCREMENT);
 298 }
 299
 300 static void create_crawler (void);
 301
 302 static void
 303 remove_crawler (void)
 304 {
 305   GSource *other_source;
 306
 307   if (crawler_array->len > 0)
 308     {
 309       other_source = crawler_array->pdata[g_random_int_range (0, crawler_array->len)];
 310       g_source_destroy (other_source);
 311       g_assert (g_ptr_array_remove_fast (crawler_array, other_source));
 312     }
 313 }
 314
 315 static gint
 316 crawler_callback (gpointer data)
 317 {
 318   GSource *source = data;
 319
 320   G_LOCK (crawler_array_lock);
 321
 322   if (!g_ptr_array_remove_fast (crawler_array, source))
 323     remove_crawler();
 324
 325   remove_crawler();
 326   G_UNLOCK (crawler_array_lock);
 327
 328   create_crawler();
 329   create_crawler();
 330
 331   return FALSE;
 332 }
 333
 334 static void
 335 create_crawler (void)
 336 {
 337   GSource *source = g_timeout_source_new (g_random_int_range (0, CRAWLER_TIMEOUT_RANGE));
 338   g_source_set_callback (source, (GSourceFunc)crawler_callback, source, NULL);
 339
 340   G_LOCK (crawler_array_lock);
 341   g_ptr_array_add (crawler_array, source);
 342
 343   g_mutex_lock (context_array_mutex);
 344   g_source_attach (source, context_array->pdata[g_random_int_range (0, context_array->len)]);
 345   g_source_unref (source);
 346   g_mutex_unlock (context_array_mutex);
 347
 348   G_UNLOCK (crawler_array_lock);
 349 }
 350
 351 static void
 352 cleanup_crawlers (GMainContext *context)
 353 {
 354   gint i;
 355
 356   G_LOCK (crawler_array_lock);
 357   for (i=0; i < crawler_array->len; i++)
 358     {
 359       if (g_source_get_context (crawler_array->pdata[i]) == context)
 360         {
 361           g_source_destroy (g_ptr_array_remove_index (crawler_array, i));
 362           i--;
 363         }
 364     }
 365   G_UNLOCK (crawler_array_lock);
 366 }
 367
 368 static gboolean
 369 recurser_idle (gpointer data)
 370 {
 371   GMainContext *context = data;
 372   gint i;
 373
 374   for (i = 0; i < 10; i++)
 375     g_main_context_iteration (context, FALSE);
 376
 377   return FALSE;
 378 }
 379
 380 static gboolean
 381 recurser_start (gpointer data)
 382 {
 383   GMainContext *context;
 384   GSource *source;
 385
 386   g_mutex_lock (context_array_mutex);
 387   context = context_array->pdata[g_random_int_range (0, context_array->len)];
 388   source = g_idle_source_new ();
 389   g_source_set_callback (source, recurser_idle, context, NULL);
 390   g_source_attach (source, context);
 391   g_source_unref (source);
 392   g_mutex_unlock (context_array_mutex);
 393
 394   return TRUE;
 395 }
 396
 397 int
 398 main (int   argc,
 399       char *argv[])
 400 {
 401   /* Only run the test, if threads are enabled and a default thread
 402      implementation is available */
 403 #if defined(G_THREADS_ENABLED) && ! defined(G_THREADS_IMPL_NONE)
 404   gint i;
 405
 406   g_thread_init (NULL);
 407
 408   context_array = g_ptr_array_new ();
 409   context_array_mutex = g_mutex_new ();
 410   context_array_cond = g_cond_new ();
 411
 412   crawler_array = g_ptr_array_new ();
 413
 414   main_loop = g_main_loop_new (NULL, FALSE);
 415
 416   for (i = 0; i < NTHREADS; i++)
 417     create_adder_thread ();
 418
 419   /* Wait for all threads to start
 420    */
 421   g_mutex_lock (context_array_mutex);
 422
 423   if (context_array->len < NTHREADS)
 424     g_cond_wait (context_array_cond, context_array_mutex);
 425
 426   g_mutex_unlock (context_array_mutex);
 427
 428   for (i = 0; i < NCRAWLERS; i++)
 429     create_crawler ();
 430
 431   g_timeout_add (RECURSER_TIMEOUT, recurser_start, NULL);
 432
 433   g_main_loop_run (main_loop);
 434   g_main_loop_unref (main_loop);
 435
 436 #endif
 437   return 0;
 438 }