1 /* Unit tests for GMainLoop
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.
24 #include "glib-private.h"
27 static gboolean cb (gpointer data)
32 static gboolean prepare (GSource *source, gint *time)
36 static gboolean check (GSource *source)
40 static gboolean dispatch (GSource *source, GSourceFunc cb, gpointer date)
45 GSourceFuncs funcs = {
53 test_maincontext_basic (void)
58 gpointer data = &funcs;
60 ctx = g_main_context_new ();
62 g_assert (!g_main_context_pending (ctx));
63 g_assert (!g_main_context_iteration (ctx, FALSE));
65 source = g_source_new (&funcs, sizeof (GSource));
66 g_assert_cmpint (g_source_get_priority (source), ==, G_PRIORITY_DEFAULT);
67 g_assert (!g_source_is_destroyed (source));
69 g_assert (!g_source_get_can_recurse (source));
70 g_assert (g_source_get_name (source) == NULL);
72 g_source_set_can_recurse (source, TRUE);
73 g_source_set_name (source, "d");
75 g_assert (g_source_get_can_recurse (source));
76 g_assert_cmpstr (g_source_get_name (source), ==, "d");
78 g_assert (g_main_context_find_source_by_user_data (ctx, NULL) == NULL);
79 g_assert (g_main_context_find_source_by_funcs_user_data (ctx, &funcs, NULL) == NULL);
81 id = g_source_attach (source, ctx);
82 g_assert_cmpint (g_source_get_id (source), ==, id);
83 g_assert (g_main_context_find_source_by_id (ctx, id) == source);
85 g_source_set_priority (source, G_PRIORITY_HIGH);
86 g_assert_cmpint (g_source_get_priority (source), ==, G_PRIORITY_HIGH);
88 g_source_destroy (source);
89 g_assert (g_source_get_context (source) == ctx);
90 g_assert (g_main_context_find_source_by_id (ctx, id) == NULL);
92 g_main_context_unref (ctx);
94 if (g_test_undefined ())
96 g_test_expect_message (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL,
97 "*assertion*source->context != NULL*failed*");
98 g_assert (g_source_get_context (source) == NULL);
99 g_test_assert_expected_messages ();
102 g_source_unref (source);
104 ctx = g_main_context_default ();
105 source = g_source_new (&funcs, sizeof (GSource));
106 g_source_set_funcs (source, &funcs);
107 g_source_set_callback (source, cb, data, NULL);
108 id = g_source_attach (source, ctx);
109 g_source_unref (source);
110 g_source_set_name_by_id (id, "e");
111 g_assert_cmpstr (g_source_get_name (source), ==, "e");
112 g_assert (g_source_get_context (source) == ctx);
113 g_assert (g_source_remove_by_funcs_user_data (&funcs, data));
115 source = g_source_new (&funcs, sizeof (GSource));
116 g_source_set_funcs (source, &funcs);
117 g_source_set_callback (source, cb, data, NULL);
118 id = g_source_attach (source, ctx);
119 g_source_unref (source);
120 g_assert (g_source_remove_by_user_data (data));
122 g_idle_add (cb, data);
123 g_assert (g_idle_remove_by_data (data));
127 test_mainloop_basic (void)
132 loop = g_main_loop_new (NULL, FALSE);
134 g_assert (!g_main_loop_is_running (loop));
136 g_main_loop_ref (loop);
138 ctx = g_main_loop_get_context (loop);
139 g_assert (ctx == g_main_context_default ());
141 g_main_loop_unref (loop);
143 g_assert_cmpint (g_main_depth (), ==, 0);
145 g_main_loop_unref (loop);
153 count_calls (gpointer data)
171 ctx = g_main_context_new ();
172 loop = g_main_loop_new (ctx, FALSE);
174 source = g_timeout_source_new (100);
175 g_source_set_callback (source, count_calls, &a, NULL);
176 g_source_attach (source, ctx);
177 g_source_unref (source);
179 source = g_timeout_source_new (250);
180 g_source_set_callback (source, count_calls, &b, NULL);
181 g_source_attach (source, ctx);
182 g_source_unref (source);
184 source = g_timeout_source_new (330);
185 g_source_set_callback (source, count_calls, &c, NULL);
186 g_source_attach (source, ctx);
187 g_source_unref (source);
189 source = g_timeout_source_new (1050);
190 g_source_set_callback (source, (GSourceFunc)g_main_loop_quit, loop, NULL);
191 g_source_attach (source, ctx);
192 g_source_unref (source);
194 g_main_loop_run (loop);
196 /* this is a race condition; under some circumstances we might not get 10
197 * 100ms runs in 1050 ms, so consider 9 as "close enough" */
198 g_assert_cmpint (a, >=, 9);
199 g_assert_cmpint (a, <=, 10);
200 g_assert_cmpint (b, ==, 4);
201 g_assert_cmpint (c, ==, 3);
203 g_main_loop_unref (loop);
204 g_main_context_unref (ctx);
208 test_priorities (void)
216 ctx = g_main_context_new ();
218 sourcea = g_idle_source_new ();
219 g_source_set_callback (sourcea, count_calls, &a, NULL);
220 g_source_set_priority (sourcea, 1);
221 g_source_attach (sourcea, ctx);
222 g_source_unref (sourcea);
224 sourceb = g_idle_source_new ();
225 g_source_set_callback (sourceb, count_calls, &b, NULL);
226 g_source_set_priority (sourceb, 0);
227 g_source_attach (sourceb, ctx);
228 g_source_unref (sourceb);
230 g_assert (g_main_context_pending (ctx));
231 g_assert (g_main_context_iteration (ctx, FALSE));
232 g_assert_cmpint (a, ==, 0);
233 g_assert_cmpint (b, ==, 1);
235 g_assert (g_main_context_iteration (ctx, FALSE));
236 g_assert_cmpint (a, ==, 0);
237 g_assert_cmpint (b, ==, 2);
239 g_source_destroy (sourceb);
241 g_assert (g_main_context_iteration (ctx, FALSE));
242 g_assert_cmpint (a, ==, 1);
243 g_assert_cmpint (b, ==, 2);
245 g_assert (g_main_context_pending (ctx));
246 g_source_destroy (sourcea);
247 g_assert (!g_main_context_pending (ctx));
249 g_main_context_unref (ctx);
253 quit_loop (gpointer data)
255 GMainLoop *loop = data;
257 g_main_loop_quit (loop);
259 return G_SOURCE_REMOVE;
268 g_assert (data == g_thread_self ());
276 call_func (gpointer data)
278 func (g_thread_self ());
280 return G_SOURCE_REMOVE;
285 static gboolean thread_ready;
288 thread_func (gpointer data)
290 GMainContext *ctx = data;
294 g_main_context_push_thread_default (ctx);
295 loop = g_main_loop_new (ctx, FALSE);
297 g_mutex_lock (&mutex);
299 g_cond_signal (&cond);
300 g_mutex_unlock (&mutex);
302 source = g_timeout_source_new (500);
303 g_source_set_callback (source, quit_loop, loop, NULL);
304 g_source_attach (source, ctx);
305 g_source_unref (source);
307 g_main_loop_run (loop);
309 g_main_context_pop_thread_default (ctx);
310 g_main_loop_unref (loop);
323 /* this one gets invoked directly */
324 g_main_context_invoke (NULL, func, g_thread_self ());
325 g_assert_cmpint (count, ==, 1);
327 /* invoking out of an idle works too */
328 g_idle_add (call_func, NULL);
329 g_main_context_iteration (g_main_context_default (), FALSE);
330 g_assert_cmpint (count, ==, 2);
332 /* test thread-default forcing the invocation to go
335 ctx = g_main_context_new ();
336 thread = g_thread_new ("worker", thread_func, ctx);
338 g_mutex_lock (&mutex);
339 while (!thread_ready)
340 g_cond_wait (&cond, &mutex);
341 g_mutex_unlock (&mutex);
343 g_main_context_invoke (ctx, func, thread);
345 g_thread_join (thread);
346 g_assert_cmpint (count, ==, 3);
348 g_main_context_unref (ctx);
352 run_inner_loop (gpointer user_data)
354 GMainContext *ctx = user_data;
360 inner = g_main_loop_new (ctx, FALSE);
361 timeout = g_timeout_source_new (100);
362 g_source_set_callback (timeout, quit_loop, inner, NULL);
363 g_source_attach (timeout, ctx);
364 g_source_unref (timeout);
366 g_main_loop_run (inner);
367 g_main_loop_unref (inner);
369 return G_SOURCE_CONTINUE;
373 test_child_sources (void)
377 GSource *parent, *child_b, *child_c, *end;
379 ctx = g_main_context_new ();
380 loop = g_main_loop_new (ctx, FALSE);
384 parent = g_timeout_source_new (2000);
385 g_source_set_callback (parent, run_inner_loop, ctx, NULL);
386 g_source_set_priority (parent, G_PRIORITY_LOW);
387 g_source_attach (parent, ctx);
389 child_b = g_timeout_source_new (250);
390 g_source_set_callback (child_b, count_calls, &b, NULL);
391 g_source_add_child_source (parent, child_b);
393 child_c = g_timeout_source_new (330);
394 g_source_set_callback (child_c, count_calls, &c, NULL);
395 g_source_set_priority (child_c, G_PRIORITY_HIGH);
396 g_source_add_child_source (parent, child_c);
398 /* Child sources always have the priority of the parent */
399 g_assert_cmpint (g_source_get_priority (parent), ==, G_PRIORITY_LOW);
400 g_assert_cmpint (g_source_get_priority (child_b), ==, G_PRIORITY_LOW);
401 g_assert_cmpint (g_source_get_priority (child_c), ==, G_PRIORITY_LOW);
402 g_source_set_priority (parent, G_PRIORITY_DEFAULT);
403 g_assert_cmpint (g_source_get_priority (parent), ==, G_PRIORITY_DEFAULT);
404 g_assert_cmpint (g_source_get_priority (child_b), ==, G_PRIORITY_DEFAULT);
405 g_assert_cmpint (g_source_get_priority (child_c), ==, G_PRIORITY_DEFAULT);
407 end = g_timeout_source_new (1050);
408 g_source_set_callback (end, quit_loop, loop, NULL);
409 g_source_attach (end, ctx);
410 g_source_unref (end);
412 g_main_loop_run (loop);
414 /* The parent source's own timeout will never trigger, so "a" will
415 * only get incremented when "b" or "c" does. And when timeouts get
416 * blocked, they still wait the full interval next time rather than
417 * "catching up". So the timing is:
419 * 250 - b++ -> a++, run_inner_loop
420 * 330 - (c is blocked)
421 * 350 - inner_loop ends
422 * 350 - c++ belatedly -> a++, run_inner_loop
423 * 450 - inner loop ends
424 * 500 - b++ -> a++, run_inner_loop
425 * 600 - inner_loop ends
426 * 680 - c++ -> a++, run_inner_loop
427 * 750 - (b is blocked)
428 * 780 - inner loop ends
429 * 780 - b++ belatedly -> a++, run_inner_loop
430 * 880 - inner loop ends
431 * 1010 - c++ -> a++, run_inner_loop
432 * 1030 - (b is blocked)
433 * 1050 - end runs, quits outer loop, which has no effect yet
434 * 1110 - inner loop ends, a returns, outer loop exits
437 g_assert_cmpint (a, ==, 6);
438 g_assert_cmpint (b, ==, 3);
439 g_assert_cmpint (c, ==, 3);
441 g_source_destroy (parent);
442 g_source_unref (parent);
443 g_source_unref (child_b);
444 g_source_unref (child_c);
446 g_main_loop_unref (loop);
447 g_main_context_unref (ctx);
451 test_recursive_child_sources (void)
455 GSource *parent, *child_b, *child_c, *end;
457 ctx = g_main_context_new ();
458 loop = g_main_loop_new (ctx, FALSE);
462 parent = g_timeout_source_new (500);
463 g_source_set_callback (parent, count_calls, &a, NULL);
465 child_b = g_timeout_source_new (220);
466 g_source_set_callback (child_b, count_calls, &b, NULL);
467 g_source_add_child_source (parent, child_b);
469 child_c = g_timeout_source_new (430);
470 g_source_set_callback (child_c, count_calls, &c, NULL);
471 g_source_add_child_source (child_b, child_c);
473 g_source_attach (parent, ctx);
475 end = g_timeout_source_new (2010);
476 g_source_set_callback (end, (GSourceFunc)g_main_loop_quit, loop, NULL);
477 g_source_attach (end, ctx);
478 g_source_unref (end);
480 g_main_loop_run (loop);
482 /* Sequence of events:
483 * 220 b (b = 440, a = 720)
484 * 430 c (c = 860, b = 650, a = 930)
485 * 650 b (b = 870, a = 1150)
486 * 860 c (c = 1290, b = 1080, a = 1360)
487 * 1080 b (b = 1300, a = 1580)
488 * 1290 c (c = 1720, b = 1510, a = 1790)
489 * 1510 b (b = 1730, a = 2010)
490 * 1720 c (c = 2150, b = 1940, a = 2220)
491 * 1940 b (b = 2160, a = 2440)
494 g_assert_cmpint (a, ==, 9);
495 g_assert_cmpint (b, ==, 9);
496 g_assert_cmpint (c, ==, 4);
498 g_source_destroy (parent);
499 g_source_unref (parent);
500 g_source_unref (child_b);
501 g_source_unref (child_c);
503 g_main_loop_unref (loop);
504 g_main_context_unref (ctx);
508 GSource *parent, *old_child, *new_child;
513 swap_sources (gpointer user_data)
515 SwappingTestData *data = user_data;
519 g_source_remove_child_source (data->parent, data->old_child);
520 g_clear_pointer (&data->old_child, g_source_unref);
523 if (!data->new_child)
525 data->new_child = g_timeout_source_new (0);
526 g_source_set_callback (data->new_child, quit_loop, data->loop, NULL);
527 g_source_add_child_source (data->parent, data->new_child);
530 return G_SOURCE_CONTINUE;
534 assert_not_reached_callback (gpointer user_data)
536 g_assert_not_reached ();
538 return G_SOURCE_REMOVE;
542 test_swapping_child_sources (void)
546 SwappingTestData data;
548 ctx = g_main_context_new ();
549 loop = g_main_loop_new (ctx, FALSE);
551 data.parent = g_timeout_source_new (50);
553 g_source_set_callback (data.parent, swap_sources, &data, NULL);
554 g_source_attach (data.parent, ctx);
556 data.old_child = g_timeout_source_new (100);
557 g_source_add_child_source (data.parent, data.old_child);
558 g_source_set_callback (data.old_child, assert_not_reached_callback, NULL, NULL);
560 data.new_child = NULL;
561 g_main_loop_run (loop);
563 g_source_destroy (data.parent);
564 g_source_unref (data.parent);
565 g_source_unref (data.new_child);
567 g_main_loop_unref (loop);
568 g_main_context_unref (ctx);
575 GSource *timeout1, *timeout2;
580 timeout1_callback (gpointer user_data)
582 TimeTestData *data = user_data;
584 gint64 mtime1, mtime2, time2;
586 source = g_main_current_source ();
587 g_assert (source == data->timeout1);
589 if (data->time1 == -1)
591 /* First iteration */
592 g_assert (!g_source_is_destroyed (data->timeout2));
594 mtime1 = g_get_monotonic_time ();
595 data->time1 = g_source_get_time (source);
597 /* g_source_get_time() does not change during a single callback */
599 mtime2 = g_get_monotonic_time ();
600 time2 = g_source_get_time (source);
602 g_assert_cmpint (mtime1, <, mtime2);
603 g_assert_cmpint (data->time1, ==, time2);
607 /* Second iteration */
608 g_assert (g_source_is_destroyed (data->timeout2));
610 /* g_source_get_time() MAY change between iterations; in this
611 * case we know for sure that it did because of the g_usleep()
614 time2 = g_source_get_time (source);
615 g_assert_cmpint (data->time1, <, time2);
617 g_main_loop_quit (data->loop);
624 timeout2_callback (gpointer user_data)
626 TimeTestData *data = user_data;
630 source = g_main_current_source ();
631 g_assert (source == data->timeout2);
633 g_assert (!g_source_is_destroyed (data->timeout1));
635 /* g_source_get_time() does not change between different sources in
636 * a single iteration of the mainloop.
638 time2 = g_source_get_time (source);
639 g_assert_cmpint (data->time1, ==, time2);
641 /* The source should still have a valid time even after being
642 * destroyed, since it's currently running.
644 g_source_destroy (source);
645 time3 = g_source_get_time (source);
646 g_assert_cmpint (time2, ==, time3);
652 test_source_time (void)
656 data.ctx = g_main_context_new ();
657 data.loop = g_main_loop_new (data.ctx, FALSE);
659 data.timeout1 = g_timeout_source_new (0);
660 g_source_set_callback (data.timeout1, timeout1_callback, &data, NULL);
661 g_source_attach (data.timeout1, data.ctx);
663 data.timeout2 = g_timeout_source_new (0);
664 g_source_set_callback (data.timeout2, timeout2_callback, &data, NULL);
665 g_source_attach (data.timeout2, data.ctx);
669 g_main_loop_run (data.loop);
671 g_assert (!g_source_is_destroyed (data.timeout1));
672 g_assert (g_source_is_destroyed (data.timeout2));
674 g_source_destroy (data.timeout1);
675 g_source_unref (data.timeout1);
676 g_source_unref (data.timeout2);
678 g_main_loop_unref (data.loop);
679 g_main_context_unref (data.ctx);
683 guint outstanding_ops;
688 on_source_fired_cb (gpointer user_data)
690 TestOverflowData *data = user_data;
691 GSource *current_source;
692 GMainContext *current_context;
695 data->outstanding_ops--;
697 current_source = g_main_current_source ();
698 current_context = g_source_get_context (current_source);
699 source_id = g_source_get_id (current_source);
700 g_assert (g_main_context_find_source_by_id (current_context, source_id) != NULL);
701 g_source_destroy (current_source);
702 g_assert (g_main_context_find_source_by_id (current_context, source_id) == NULL);
704 if (data->outstanding_ops == 0)
705 g_main_loop_quit (data->loop);
710 add_idle_source (GMainContext *ctx,
711 TestOverflowData *data)
715 source = g_idle_source_new ();
716 g_source_set_callback (source, on_source_fired_cb, data, NULL);
717 g_source_attach (source, ctx);
718 g_source_unref (source);
719 data->outstanding_ops++;
724 /* https://bugzilla.gnome.org/show_bug.cgi?id=687098 */
726 test_mainloop_overflow (void)
731 TestOverflowData data;
734 memset (&data, 0, sizeof (data));
736 ctx = GLIB_PRIVATE_CALL (g_main_context_new_with_next_id) (G_MAXUINT-1);
738 loop = g_main_loop_new (ctx, TRUE);
739 data.outstanding_ops = 0;
742 source = add_idle_source (ctx, &data);
743 g_assert_cmpint (source->source_id, ==, G_MAXUINT-1);
745 source = add_idle_source (ctx, &data);
746 g_assert_cmpint (source->source_id, ==, G_MAXUINT);
748 source = add_idle_source (ctx, &data);
749 g_assert_cmpint (source->source_id, !=, 0);
751 /* Now, a lot more sources */
752 for (i = 0; i < 50; i++)
754 source = add_idle_source (ctx, &data);
755 g_assert_cmpint (source->source_id, !=, 0);
758 g_main_loop_run (loop);
759 g_assert_cmpint (data.outstanding_ops, ==, 0);
761 g_main_loop_unref (loop);
762 g_main_context_unref (ctx);
765 static volatile gboolean ready_time_dispatched;
768 ready_time_dispatch (GSource *source,
769 GSourceFunc callback,
772 ready_time_dispatched = TRUE;
774 g_source_set_ready_time (source, -1);
780 run_context (gpointer user_data)
782 g_main_loop_run (user_data);
788 test_ready_time (void)
792 GSourceFuncs source_funcs = {
793 NULL, NULL, ready_time_dispatch
797 source = g_source_new (&source_funcs, sizeof (GSource));
798 g_source_attach (source, NULL);
799 g_source_unref (source);
801 /* Unfortunately we can't do too many things with respect to timing
802 * without getting into trouble on slow systems or heavily loaded
805 * We can test that the basics are working, though.
808 /* A source with no ready time set should not fire */
809 g_assert_cmpint (g_source_get_ready_time (source), ==, -1);
810 while (g_main_context_iteration (NULL, FALSE));
811 g_assert (!ready_time_dispatched);
813 /* The ready time should not have been changed */
814 g_assert_cmpint (g_source_get_ready_time (source), ==, -1);
816 /* Of course this shouldn't change anything either */
817 g_source_set_ready_time (source, -1);
818 g_assert_cmpint (g_source_get_ready_time (source), ==, -1);
820 /* A source with a ready time set to tomorrow should not fire on any
821 * builder, no matter how badly loaded...
823 g_source_set_ready_time (source, g_get_monotonic_time () + G_TIME_SPAN_DAY);
824 while (g_main_context_iteration (NULL, FALSE));
825 g_assert (!ready_time_dispatched);
826 /* Make sure it didn't get reset */
827 g_assert_cmpint (g_source_get_ready_time (source), !=, -1);
829 /* Ready time of -1 -> don't fire */
830 g_source_set_ready_time (source, -1);
831 while (g_main_context_iteration (NULL, FALSE));
832 g_assert (!ready_time_dispatched);
833 /* Not reset, but should still be -1 from above */
834 g_assert_cmpint (g_source_get_ready_time (source), ==, -1);
836 /* A ready time of the current time should fire immediately */
837 g_source_set_ready_time (source, g_get_monotonic_time ());
838 while (g_main_context_iteration (NULL, FALSE));
839 g_assert (ready_time_dispatched);
840 ready_time_dispatched = FALSE;
841 /* Should have gotten reset by the handler function */
842 g_assert_cmpint (g_source_get_ready_time (source), ==, -1);
844 /* As well as one in the recent past... */
845 g_source_set_ready_time (source, g_get_monotonic_time () - G_TIME_SPAN_SECOND);
846 while (g_main_context_iteration (NULL, FALSE));
847 g_assert (ready_time_dispatched);
848 ready_time_dispatched = FALSE;
849 g_assert_cmpint (g_source_get_ready_time (source), ==, -1);
851 /* Zero is the 'official' way to get a source to fire immediately */
852 g_source_set_ready_time (source, 0);
853 while (g_main_context_iteration (NULL, FALSE));
854 g_assert (ready_time_dispatched);
855 ready_time_dispatched = FALSE;
856 g_assert_cmpint (g_source_get_ready_time (source), ==, -1);
858 /* Now do some tests of cross-thread wakeups.
860 * Make sure it wakes up right away from the start.
862 g_source_set_ready_time (source, 0);
863 loop = g_main_loop_new (NULL, FALSE);
864 thread = g_thread_new ("context thread", run_context, loop);
865 while (!ready_time_dispatched);
867 /* Now let's see if it can wake up from sleeping. */
868 g_usleep (G_TIME_SPAN_SECOND / 2);
869 ready_time_dispatched = FALSE;
870 g_source_set_ready_time (source, 0);
871 while (!ready_time_dispatched);
873 /* kill the thread */
874 g_main_loop_quit (loop);
875 g_thread_join (thread);
876 g_main_loop_unref (loop);
878 g_source_destroy (source);
883 #include <glib-unix.h>
886 static gchar zeros[1024];
889 fill_a_pipe (gint fd)
895 pfd.events = G_IO_OUT;
896 while (g_poll (&pfd, 1, 0) == 1)
897 /* we should never see -1 here */
898 written += write (fd, zeros, sizeof zeros);
904 write_bytes (gint fd,
905 GIOCondition condition,
908 gssize *to_write = user_data;
914 /* Detect if we run before we should */
915 g_assert (to_write >= 0);
917 limit = MIN (*to_write, sizeof zeros);
918 *to_write -= write (fd, zeros, limit);
925 GIOCondition condition,
928 static gchar buffer[1024];
929 gssize *to_read = user_data;
931 *to_read -= read (fd, buffer, sizeof buffer);
933 /* The loop will exit when there is nothing else to read, then we will
934 * use g_source_remove() to destroy this source.
942 gssize to_write = -1;
953 to_read = fill_a_pipe (fds[1]);
954 /* write at higher priority to keep the pipe full... */
955 a = g_unix_fd_add_full (G_PRIORITY_HIGH, fds[1], G_IO_OUT, write_bytes, &to_write, NULL);
956 source_a = g_main_context_find_source_by_id (NULL, a);
957 /* make sure no 'writes' get dispatched yet */
958 while (g_main_context_iteration (NULL, FALSE));
960 to_read += 128 * 1024 * 1024;
961 to_write = 128 * 1024 * 1024;
962 b = g_unix_fd_add (fds[0], G_IO_IN, read_bytes, &to_read);
963 source_b = g_source_ref (g_main_context_find_source_by_id (NULL, b));
965 /* Assuming the kernel isn't internally 'laggy' then there will always
966 * be either data to read or room in which to write. That will keep
967 * the loop running until all data has been read and written.
971 gssize to_write_was = to_write;
972 gssize to_read_was = to_read;
974 if (!g_main_context_iteration (NULL, FALSE))
977 /* Since the sources are at different priority, only one of them
978 * should possibly have run.
980 g_assert (to_write == to_write_was || to_read == to_read_was);
983 g_assert (to_write == 0);
984 g_assert (to_read == 0);
986 /* 'a' is already removed by itself */
987 g_assert (g_source_is_destroyed (source_a));
988 g_source_unref (source_a);
990 g_assert (g_source_is_destroyed (source_b));
991 g_source_unref (source_b);
997 assert_main_context_state (gint n_to_poll,
1000 GMainContext *context;
1001 gboolean consumed[10] = { };
1002 GPollFD poll_fds[10];
1010 context = g_main_context_default ();
1012 immediate = g_main_context_prepare (context, &max_priority);
1013 g_assert (!immediate);
1014 n = g_main_context_query (context, max_priority, &timeout, poll_fds, 10);
1015 g_assert_cmpint (n, ==, n_to_poll + 1); /* one will be the gwakeup */
1017 va_start (ap, n_to_poll);
1018 for (i = 0; i < n_to_poll; i++)
1020 gint expected_fd = va_arg (ap, gint);
1021 GIOCondition expected_events = va_arg (ap, GIOCondition);
1022 GIOCondition report_events = va_arg (ap, GIOCondition);
1024 for (j = 0; j < n; j++)
1025 if (!consumed[j] && poll_fds[j].fd == expected_fd && poll_fds[j].events == expected_events)
1027 poll_fds[j].revents = report_events;
1033 g_error ("Unable to find fd %d (index %d) with events 0x%x\n", expected_fd, i, (guint) expected_events);
1037 /* find the gwakeup, flag as non-ready */
1038 for (i = 0; i < n; i++)
1040 poll_fds[i].revents = 0;
1042 if (g_main_context_check (context, max_priority, poll_fds, n))
1043 g_main_context_dispatch (context);
1048 GIOCondition condition,
1051 gboolean *flag = user_data;
1059 test_unix_fd_source (void)
1061 GSource *out_source;
1068 assert_main_context_state (0);
1073 source = g_unix_fd_source_new (fds[1], G_IO_OUT);
1074 g_source_attach (source, NULL);
1076 /* Check that a source with no callback gets successfully detached
1077 * with a warning printed.
1079 g_test_expect_message ("GLib", G_LOG_LEVEL_WARNING, "*GUnixFDSource dispatched without callback*");
1080 while (g_main_context_iteration (NULL, FALSE));
1081 g_test_assert_expected_messages ();
1082 g_assert (g_source_is_destroyed (source));
1083 g_source_unref (source);
1086 out_source = g_unix_fd_source_new (fds[1], G_IO_OUT);
1087 g_source_set_callback (out_source, (GSourceFunc) flag_bool, &out, NULL);
1088 g_source_attach (out_source, NULL);
1089 assert_main_context_state (1,
1090 fds[1], G_IO_OUT, 0);
1091 g_assert (!in && !out);
1093 in_source = g_unix_fd_source_new (fds[0], G_IO_IN);
1094 g_source_set_callback (in_source, (GSourceFunc) flag_bool, &in, NULL);
1095 g_source_set_priority (in_source, G_PRIORITY_DEFAULT_IDLE);
1096 g_source_attach (in_source, NULL);
1097 assert_main_context_state (2,
1098 fds[0], G_IO_IN, G_IO_IN,
1099 fds[1], G_IO_OUT, G_IO_OUT);
1100 /* out is higher priority so only it should fire */
1101 g_assert (!in && out);
1103 /* raise the priority of the in source to higher than out*/
1105 g_source_set_priority (in_source, G_PRIORITY_HIGH);
1106 assert_main_context_state (2,
1107 fds[0], G_IO_IN, G_IO_IN,
1108 fds[1], G_IO_OUT, G_IO_OUT);
1109 g_assert (in && !out);
1111 /* now, let them be equal */
1113 g_source_set_priority (in_source, G_PRIORITY_DEFAULT);
1114 assert_main_context_state (2,
1115 fds[0], G_IO_IN, G_IO_IN,
1116 fds[1], G_IO_OUT, G_IO_OUT);
1117 g_assert (in && out);
1119 g_source_destroy (out_source);
1120 g_source_destroy (in_source);
1132 return_true (GSource *source, GSourceFunc callback, gpointer user_data)
1134 FlagSource *flag_source = (FlagSource *) source;
1136 flag_source->flagged = TRUE;
1141 #define assert_flagged(s) g_assert (((FlagSource *) (s))->flagged);
1142 #define assert_not_flagged(s) g_assert (!((FlagSource *) (s))->flagged);
1143 #define clear_flag(s) ((FlagSource *) (s))->flagged = 0
1146 test_source_unix_fd_api (void)
1148 GSourceFuncs no_funcs = {
1149 NULL, NULL, return_true
1153 gpointer tag1, tag2;
1160 source_a = g_source_new (&no_funcs, sizeof (FlagSource));
1161 source_b = g_source_new (&no_funcs, sizeof (FlagSource));
1163 /* attach a source with more than one fd */
1164 g_source_add_unix_fd (source_a, fds_a[0], G_IO_IN);
1165 g_source_add_unix_fd (source_a, fds_a[1], G_IO_OUT);
1166 g_source_attach (source_a, NULL);
1167 assert_main_context_state (2,
1168 fds_a[0], G_IO_IN, 0,
1169 fds_a[1], G_IO_OUT, 0);
1170 assert_not_flagged (source_a);
1172 /* attach a higher priority source with no fds */
1173 g_source_set_priority (source_b, G_PRIORITY_HIGH);
1174 g_source_attach (source_b, NULL);
1175 assert_main_context_state (2,
1176 fds_a[0], G_IO_IN, G_IO_IN,
1177 fds_a[1], G_IO_OUT, 0);
1178 assert_flagged (source_a);
1179 assert_not_flagged (source_b);
1180 clear_flag (source_a);
1182 /* add some fds to the second source, while attached */
1183 tag1 = g_source_add_unix_fd (source_b, fds_b[0], G_IO_IN);
1184 tag2 = g_source_add_unix_fd (source_b, fds_b[1], G_IO_OUT);
1185 assert_main_context_state (4,
1186 fds_a[0], G_IO_IN, 0,
1187 fds_a[1], G_IO_OUT, G_IO_OUT,
1188 fds_b[0], G_IO_IN, 0,
1189 fds_b[1], G_IO_OUT, G_IO_OUT);
1190 /* only 'b' (higher priority) should have dispatched */
1191 assert_not_flagged (source_a);
1192 assert_flagged (source_b);
1193 clear_flag (source_b);
1195 /* change our events on b to the same as they were before */
1196 g_source_modify_unix_fd (source_b, tag1, G_IO_IN);
1197 g_source_modify_unix_fd (source_b, tag2, G_IO_OUT);
1198 assert_main_context_state (4,
1199 fds_a[0], G_IO_IN, 0,
1200 fds_a[1], G_IO_OUT, G_IO_OUT,
1201 fds_b[0], G_IO_IN, 0,
1202 fds_b[1], G_IO_OUT, G_IO_OUT);
1203 assert_not_flagged (source_a);
1204 assert_flagged (source_b);
1205 clear_flag (source_b);
1207 /* now reverse them */
1208 g_source_modify_unix_fd (source_b, tag1, G_IO_OUT);
1209 g_source_modify_unix_fd (source_b, tag2, G_IO_IN);
1210 assert_main_context_state (4,
1211 fds_a[0], G_IO_IN, 0,
1212 fds_a[1], G_IO_OUT, G_IO_OUT,
1213 fds_b[0], G_IO_OUT, 0,
1214 fds_b[1], G_IO_IN, 0);
1215 /* 'b' had no events, so 'a' can go this time */
1216 assert_flagged (source_a);
1217 assert_not_flagged (source_b);
1218 clear_flag (source_a);
1220 /* remove one of the fds from 'b' */
1221 g_source_remove_unix_fd (source_b, tag1);
1222 assert_main_context_state (3,
1223 fds_a[0], G_IO_IN, 0,
1224 fds_a[1], G_IO_OUT, 0,
1225 fds_b[1], G_IO_IN, 0);
1226 assert_not_flagged (source_a);
1227 assert_not_flagged (source_b);
1229 /* remove the other */
1230 g_source_remove_unix_fd (source_b, tag2);
1231 assert_main_context_state (2,
1232 fds_a[0], G_IO_IN, 0,
1233 fds_a[1], G_IO_OUT, 0);
1234 assert_not_flagged (source_a);
1235 assert_not_flagged (source_b);
1237 /* destroy the sources */
1238 g_source_destroy (source_a);
1239 g_source_destroy (source_b);
1240 assert_main_context_state (0);
1242 g_source_unref (source_a);
1243 g_source_unref (source_b);
1253 main (int argc, char *argv[])
1255 g_test_init (&argc, &argv, NULL);
1257 g_test_add_func ("/maincontext/basic", test_maincontext_basic);
1258 g_test_add_func ("/mainloop/basic", test_mainloop_basic);
1259 g_test_add_func ("/mainloop/timeouts", test_timeouts);
1260 g_test_add_func ("/mainloop/priorities", test_priorities);
1261 g_test_add_func ("/mainloop/invoke", test_invoke);
1262 g_test_add_func ("/mainloop/child_sources", test_child_sources);
1263 g_test_add_func ("/mainloop/recursive_child_sources", test_recursive_child_sources);
1264 g_test_add_func ("/mainloop/swapping_child_sources", test_swapping_child_sources);
1265 g_test_add_func ("/mainloop/source_time", test_source_time);
1266 g_test_add_func ("/mainloop/overflow", test_mainloop_overflow);
1267 g_test_add_func ("/mainloop/ready-time", test_ready_time);
1269 g_test_add_func ("/mainloop/unix-fd", test_unix_fd);
1270 g_test_add_func ("/mainloop/unix-fd-source", test_unix_fd_source);
1271 g_test_add_func ("/mainloop/source-unix-fd-api", test_source_unix_fd_api);
1274 return g_test_run ();