gio/tests/contexts.c

   1 #include <gio/gio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #define TEST_FILE (SRCDIR "/Makefile.am")
   6 char *test_file_buffer;
   7 gsize test_file_size;
   8 static char async_read_buffer[8192];
   9
  10 static void
  11 read_data (GObject *source, GAsyncResult *result, gpointer loop)
  12 {
  13   GInputStream *in = G_INPUT_STREAM (source);
  14   GError *error = NULL;
  15   gssize nread;
  16
  17   nread = g_input_stream_read_finish (in, result, &error);
  18   g_assert_no_error (error);
  19
  20   g_assert_cmpint (nread, >, 0);
  21   g_assert_cmpint (nread, <=, MIN(sizeof (async_read_buffer), test_file_size));
  22   g_assert (memcmp (async_read_buffer, test_file_buffer, nread) == 0);
  23
  24   g_main_loop_quit (loop);
  25 }
  26
  27 static void
  28 opened_for_read (GObject *source, GAsyncResult *result, gpointer loop)
  29 {
  30   GFile *file = G_FILE (source);
  31   GFileInputStream *in;
  32   GError *error = NULL;
  33
  34   in = g_file_read_finish (file, result, &error);
  35   g_assert_no_error (error);
  36
  37   memset (async_read_buffer, 0, sizeof (async_read_buffer));
  38   g_input_stream_read_async (G_INPUT_STREAM (in),
  39                              async_read_buffer, sizeof (async_read_buffer),
  40                              G_PRIORITY_DEFAULT, NULL,
  41                              read_data, loop);
  42
  43   g_object_unref (in);
  44 }
  45
  46 /* Test 1: Async I/O started in a thread with a thread-default context
  47  * will stick to that thread, and will complete even if the default
  48  * main loop is blocked. (NB: the last part would not be true if we
  49  * were testing GFileMonitor!)
  50  */
  51
  52 static gboolean idle_start_test1_thread (gpointer loop);
  53 static gpointer test1_thread (gpointer user_data);
  54
  55 static gboolean test1_done;
  56 static GCond test1_cond;
  57 static GMutex test1_mutex;
  58
  59 static void
  60 test_thread_independence (void)
  61 {
  62   GMainLoop *loop;
  63
  64   loop = g_main_loop_new (NULL, FALSE);
  65   g_idle_add (idle_start_test1_thread, loop);
  66   g_main_loop_run (loop);
  67   g_main_loop_unref (loop);
  68 }
  69
  70 static gboolean
  71 idle_start_test1_thread (gpointer loop)
  72 {
  73   gint64 time;
  74   GThread *thread;
  75   gboolean io_completed;
  76
  77   g_mutex_lock (&test1_mutex);
  78   thread = g_thread_new ("test1", test1_thread, NULL);
  79
  80   time = g_get_monotonic_time () + 2 * G_TIME_SPAN_SECOND;
  81   while (!test1_done)
  82     {
  83       io_completed = g_cond_wait_until (&test1_cond, &test1_mutex, time);
  84       g_assert (io_completed);
  85     }
  86   g_thread_join (thread);
  87
  88   g_mutex_unlock (&test1_mutex);
  89   g_main_loop_quit (loop);
  90   return G_SOURCE_REMOVE;
  91 }
  92
  93 static gpointer
  94 test1_thread (gpointer user_data)
  95 {
  96   GMainContext *context;
  97   GMainLoop *loop;
  98   GFile *file;
  99
 100   /* Wait for main thread to be waiting on test1_cond */
 101   g_mutex_lock (&test1_mutex);
 102
 103   context = g_main_context_new ();
 104   g_assert (g_main_context_get_thread_default () == NULL);
 105   g_main_context_push_thread_default (context);
 106   g_assert (g_main_context_get_thread_default () == context);
 107
 108   file = g_file_new_for_path (TEST_FILE);
 109   g_assert (g_file_supports_thread_contexts (file));
 110
 111   loop = g_main_loop_new (context, FALSE);
 112   g_file_read_async (file, G_PRIORITY_DEFAULT, NULL,
 113                      opened_for_read, loop);
 114   g_object_unref (file);
 115   g_main_loop_run (loop);
 116   g_main_loop_unref (loop);
 117
 118   test1_done = TRUE;
 119   g_cond_signal (&test1_cond);
 120   g_mutex_unlock (&test1_mutex);
 121
 122   return NULL;
 123 }
 124
 125 /* Test 2: If we push a thread-default context in the main thread, we
 126  * can run async ops in that context without running the default
 127  * context.
 128  */
 129
 130 static gboolean test2_fail (gpointer user_data);
 131
 132 static void
 133 test_context_independence (void)
 134 {
 135   GMainContext *context;
 136   GMainLoop *loop;
 137   GFile *file;
 138   guint default_timeout;
 139   GSource *thread_default_timeout;
 140
 141   context = g_main_context_new ();
 142   g_assert (g_main_context_get_thread_default () == NULL);
 143   g_main_context_push_thread_default (context);
 144   g_assert (g_main_context_get_thread_default () == context);
 145
 146   file = g_file_new_for_path (TEST_FILE);
 147   g_assert (g_file_supports_thread_contexts (file));
 148
 149   /* Add a timeout to the main loop, to fail immediately if it gets run */
 150   default_timeout = g_timeout_add_full (G_PRIORITY_HIGH, 0,
 151                                         test2_fail, NULL, NULL);
 152   /* Add a timeout to the alternate loop, to fail if the I/O *doesn't* run */
 153   thread_default_timeout = g_timeout_source_new_seconds (2);
 154   g_source_set_callback (thread_default_timeout, test2_fail, NULL, NULL);
 155   g_source_attach (thread_default_timeout, context);
 156
 157   loop = g_main_loop_new (context, FALSE);
 158   g_file_read_async (file, G_PRIORITY_DEFAULT, NULL,
 159                      opened_for_read, loop);
 160   g_object_unref (file);
 161   g_main_loop_run (loop);
 162   g_main_loop_unref (loop);
 163
 164   g_source_remove (default_timeout);
 165   g_source_destroy (thread_default_timeout);
 166   g_source_unref (thread_default_timeout);
 167 }
 168
 169 static gboolean
 170 test2_fail (gpointer user_data)
 171 {
 172   g_assert_not_reached ();
 173   return FALSE;
 174 }
 175
 176 int
 177 main (int argc, char **argv)
 178 {
 179   GError *error = NULL;
 180
 181   g_type_init ();
 182   g_test_init (&argc, &argv, NULL);
 183
 184   g_file_get_contents (TEST_FILE, &test_file_buffer,
 185                        &test_file_size, &error);
 186   g_assert_no_error (error);
 187
 188   g_test_add_func ("/gio/contexts/thread-independence", test_thread_independence);
 189   g_test_add_func ("/gio/contexts/context-independence", test_context_independence);
 190
 191   return g_test_run();
 192 }