tests/test-aio.c

   1 /*
   2  * AioContext tests
   3  *
   4  * Copyright Red Hat, Inc. 2012
   5  *
   6  * Authors:
   7  *  Paolo Bonzini    <pbonzini@redhat.com>
   8  *
   9  * This work is licensed under the terms of the GNU LGPL, version 2 or later.
  10  * See the COPYING.LIB file in the top-level directory.
  11  */
  12
  13 #include <glib.h>
  14 #include "block/aio.h"
  15 #include "qemu/timer.h"
  16 #include "qemu/sockets.h"
  17 #include "qemu/error-report.h"
  18
  19 static AioContext *ctx;
  20
  21 typedef struct {
  22     EventNotifier e;
  23     int n;
  24     int active;
  25     bool auto_set;
  26 } EventNotifierTestData;
  27
  28 /* Wait until event notifier becomes inactive */
  29 static void wait_until_inactive(EventNotifierTestData *data)
  30 {
  31     while (data->active > 0) {
  32         aio_poll(ctx, true);
  33     }
  34 }
  35
  36 /* Simple callbacks for testing.  */
  37
  38 typedef struct {
  39     QEMUBH *bh;
  40     int n;
  41     int max;
  42 } BHTestData;
  43
  44 typedef struct {
  45     QEMUTimer timer;
  46     QEMUClockType clock_type;
  47     int n;
  48     int max;
  49     int64_t ns;
  50     AioContext *ctx;
  51 } TimerTestData;
  52
  53 static void bh_test_cb(void *opaque)
  54 {
  55     BHTestData *data = opaque;
  56     if (++data->n < data->max) {
  57         qemu_bh_schedule(data->bh);
  58     }
  59 }
  60
  61 static void timer_test_cb(void *opaque)
  62 {
  63     TimerTestData *data = opaque;
  64     if (++data->n < data->max) {
  65         timer_mod(&data->timer,
  66                   qemu_clock_get_ns(data->clock_type) + data->ns);
  67     }
  68 }
  69
  70 static void dummy_io_handler_read(EventNotifier *e)
  71 {
  72 }
  73
  74 static void bh_delete_cb(void *opaque)
  75 {
  76     BHTestData *data = opaque;
  77     if (++data->n < data->max) {
  78         qemu_bh_schedule(data->bh);
  79     } else {
  80         qemu_bh_delete(data->bh);
  81         data->bh = NULL;
  82     }
  83 }
  84
  85 static void event_ready_cb(EventNotifier *e)
  86 {
  87     EventNotifierTestData *data = container_of(e, EventNotifierTestData, e);
  88     g_assert(event_notifier_test_and_clear(e));
  89     data->n++;
  90     if (data->active > 0) {
  91         data->active--;
  92     }
  93     if (data->auto_set && data->active) {
  94         event_notifier_set(e);
  95     }
  96 }
  97
  98 /* Tests using aio_*.  */
  99
 100 static void test_notify(void)
 101 {
 102     g_assert(!aio_poll(ctx, false));
 103     aio_notify(ctx);
 104     g_assert(!aio_poll(ctx, true));
 105     g_assert(!aio_poll(ctx, false));
 106 }
 107
 108 typedef struct {
 109     QemuMutex start_lock;
 110     EventNotifier notifier;
 111     bool thread_acquired;
 112 } AcquireTestData;
 113
 114 static void *test_acquire_thread(void *opaque)
 115 {
 116     AcquireTestData *data = opaque;
 117
 118     /* Wait for other thread to let us start */
 119     qemu_mutex_lock(&data->start_lock);
 120     qemu_mutex_unlock(&data->start_lock);
 121
 122     g_usleep(500000);
 123     event_notifier_set(&data->notifier);
 124     aio_context_acquire(ctx);
 125     aio_context_release(ctx);
 126
 127     data->thread_acquired = true; /* success, we got here */
 128
 129     return NULL;
 130 }
 131
 132 static void dummy_notifier_read(EventNotifier *n)
 133 {
 134     event_notifier_test_and_clear(n);
 135 }
 136
 137 static void test_acquire(void)
 138 {
 139     QemuThread thread;
 140     AcquireTestData data;
 141
 142     /* Dummy event notifier ensures aio_poll() will block */
 143     event_notifier_init(&data.notifier, false);
 144     aio_set_event_notifier(ctx, &data.notifier, dummy_notifier_read);
 145     g_assert(!aio_poll(ctx, false)); /* consume aio_notify() */
 146
 147     qemu_mutex_init(&data.start_lock);
 148     qemu_mutex_lock(&data.start_lock);
 149     data.thread_acquired = false;
 150
 151     qemu_thread_create(&thread, "test_acquire_thread",
 152                        test_acquire_thread,
 153                        &data, QEMU_THREAD_JOINABLE);
 154
 155     /* Block in aio_poll(), let other thread kick us and acquire context */
 156     aio_context_acquire(ctx);
 157     qemu_mutex_unlock(&data.start_lock); /* let the thread run */
 158     g_assert(aio_poll(ctx, true));
 159     g_assert(!data.thread_acquired);
 160     aio_context_release(ctx);
 161
 162     qemu_thread_join(&thread);
 163     aio_set_event_notifier(ctx, &data.notifier, NULL);
 164     event_notifier_cleanup(&data.notifier);
 165
 166     g_assert(data.thread_acquired);
 167 }
 168
 169 static void test_bh_schedule(void)
 170 {
 171     BHTestData data = { .n = 0 };
 172     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 173
 174     qemu_bh_schedule(data.bh);
 175     g_assert_cmpint(data.n, ==, 0);
 176
 177     g_assert(aio_poll(ctx, true));
 178     g_assert_cmpint(data.n, ==, 1);
 179
 180     g_assert(!aio_poll(ctx, false));
 181     g_assert_cmpint(data.n, ==, 1);
 182     qemu_bh_delete(data.bh);
 183 }
 184
 185 static void test_bh_schedule10(void)
 186 {
 187     BHTestData data = { .n = 0, .max = 10 };
 188     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 189
 190     qemu_bh_schedule(data.bh);
 191     g_assert_cmpint(data.n, ==, 0);
 192
 193     g_assert(aio_poll(ctx, false));
 194     g_assert_cmpint(data.n, ==, 1);
 195
 196     g_assert(aio_poll(ctx, true));
 197     g_assert_cmpint(data.n, ==, 2);
 198
 199     while (data.n < 10) {
 200         aio_poll(ctx, true);
 201     }
 202     g_assert_cmpint(data.n, ==, 10);
 203
 204     g_assert(!aio_poll(ctx, false));
 205     g_assert_cmpint(data.n, ==, 10);
 206     qemu_bh_delete(data.bh);
 207 }
 208
 209 static void test_bh_cancel(void)
 210 {
 211     BHTestData data = { .n = 0 };
 212     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 213
 214     qemu_bh_schedule(data.bh);
 215     g_assert_cmpint(data.n, ==, 0);
 216
 217     qemu_bh_cancel(data.bh);
 218     g_assert_cmpint(data.n, ==, 0);
 219
 220     g_assert(!aio_poll(ctx, false));
 221     g_assert_cmpint(data.n, ==, 0);
 222     qemu_bh_delete(data.bh);
 223 }
 224
 225 static void test_bh_delete(void)
 226 {
 227     BHTestData data = { .n = 0 };
 228     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 229
 230     qemu_bh_schedule(data.bh);
 231     g_assert_cmpint(data.n, ==, 0);
 232
 233     qemu_bh_delete(data.bh);
 234     g_assert_cmpint(data.n, ==, 0);
 235
 236     g_assert(!aio_poll(ctx, false));
 237     g_assert_cmpint(data.n, ==, 0);
 238 }
 239
 240 static void test_bh_delete_from_cb(void)
 241 {
 242     BHTestData data1 = { .n = 0, .max = 1 };
 243
 244     data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
 245
 246     qemu_bh_schedule(data1.bh);
 247     g_assert_cmpint(data1.n, ==, 0);
 248
 249     while (data1.n < data1.max) {
 250         aio_poll(ctx, true);
 251     }
 252     g_assert_cmpint(data1.n, ==, data1.max);
 253     g_assert(data1.bh == NULL);
 254
 255     g_assert(!aio_poll(ctx, false));
 256 }
 257
 258 static void test_bh_delete_from_cb_many(void)
 259 {
 260     BHTestData data1 = { .n = 0, .max = 1 };
 261     BHTestData data2 = { .n = 0, .max = 3 };
 262     BHTestData data3 = { .n = 0, .max = 2 };
 263     BHTestData data4 = { .n = 0, .max = 4 };
 264
 265     data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
 266     data2.bh = aio_bh_new(ctx, bh_delete_cb, &data2);
 267     data3.bh = aio_bh_new(ctx, bh_delete_cb, &data3);
 268     data4.bh = aio_bh_new(ctx, bh_delete_cb, &data4);
 269
 270     qemu_bh_schedule(data1.bh);
 271     qemu_bh_schedule(data2.bh);
 272     qemu_bh_schedule(data3.bh);
 273     qemu_bh_schedule(data4.bh);
 274     g_assert_cmpint(data1.n, ==, 0);
 275     g_assert_cmpint(data2.n, ==, 0);
 276     g_assert_cmpint(data3.n, ==, 0);
 277     g_assert_cmpint(data4.n, ==, 0);
 278
 279     g_assert(aio_poll(ctx, false));
 280     g_assert_cmpint(data1.n, ==, 1);
 281     g_assert_cmpint(data2.n, ==, 1);
 282     g_assert_cmpint(data3.n, ==, 1);
 283     g_assert_cmpint(data4.n, ==, 1);
 284     g_assert(data1.bh == NULL);
 285
 286     while (data1.n < data1.max ||
 287            data2.n < data2.max ||
 288            data3.n < data3.max ||
 289            data4.n < data4.max) {
 290         aio_poll(ctx, true);
 291     }
 292     g_assert_cmpint(data1.n, ==, data1.max);
 293     g_assert_cmpint(data2.n, ==, data2.max);
 294     g_assert_cmpint(data3.n, ==, data3.max);
 295     g_assert_cmpint(data4.n, ==, data4.max);
 296     g_assert(data1.bh == NULL);
 297     g_assert(data2.bh == NULL);
 298     g_assert(data3.bh == NULL);
 299     g_assert(data4.bh == NULL);
 300 }
 301
 302 static void test_bh_flush(void)
 303 {
 304     BHTestData data = { .n = 0 };
 305     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 306
 307     qemu_bh_schedule(data.bh);
 308     g_assert_cmpint(data.n, ==, 0);
 309
 310     g_assert(aio_poll(ctx, true));
 311     g_assert_cmpint(data.n, ==, 1);
 312
 313     g_assert(!aio_poll(ctx, false));
 314     g_assert_cmpint(data.n, ==, 1);
 315     qemu_bh_delete(data.bh);
 316 }
 317
 318 static void test_set_event_notifier(void)
 319 {
 320     EventNotifierTestData data = { .n = 0, .active = 0 };
 321     event_notifier_init(&data.e, false);
 322     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 323     g_assert(!aio_poll(ctx, false));
 324     g_assert_cmpint(data.n, ==, 0);
 325
 326     aio_set_event_notifier(ctx, &data.e, NULL);
 327     g_assert(!aio_poll(ctx, false));
 328     g_assert_cmpint(data.n, ==, 0);
 329     event_notifier_cleanup(&data.e);
 330 }
 331
 332 static void test_wait_event_notifier(void)
 333 {
 334     EventNotifierTestData data = { .n = 0, .active = 1 };
 335     event_notifier_init(&data.e, false);
 336     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 337     g_assert(!aio_poll(ctx, false));
 338     g_assert_cmpint(data.n, ==, 0);
 339     g_assert_cmpint(data.active, ==, 1);
 340
 341     event_notifier_set(&data.e);
 342     g_assert(aio_poll(ctx, false));
 343     g_assert_cmpint(data.n, ==, 1);
 344     g_assert_cmpint(data.active, ==, 0);
 345
 346     g_assert(!aio_poll(ctx, false));
 347     g_assert_cmpint(data.n, ==, 1);
 348     g_assert_cmpint(data.active, ==, 0);
 349
 350     aio_set_event_notifier(ctx, &data.e, NULL);
 351     g_assert(!aio_poll(ctx, false));
 352     g_assert_cmpint(data.n, ==, 1);
 353
 354     event_notifier_cleanup(&data.e);
 355 }
 356
 357 static void test_flush_event_notifier(void)
 358 {
 359     EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
 360     event_notifier_init(&data.e, false);
 361     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 362     g_assert(!aio_poll(ctx, false));
 363     g_assert_cmpint(data.n, ==, 0);
 364     g_assert_cmpint(data.active, ==, 10);
 365
 366     event_notifier_set(&data.e);
 367     g_assert(aio_poll(ctx, false));
 368     g_assert_cmpint(data.n, ==, 1);
 369     g_assert_cmpint(data.active, ==, 9);
 370     g_assert(aio_poll(ctx, false));
 371
 372     wait_until_inactive(&data);
 373     g_assert_cmpint(data.n, ==, 10);
 374     g_assert_cmpint(data.active, ==, 0);
 375     g_assert(!aio_poll(ctx, false));
 376
 377     aio_set_event_notifier(ctx, &data.e, NULL);
 378     g_assert(!aio_poll(ctx, false));
 379     event_notifier_cleanup(&data.e);
 380 }
 381
 382 static void test_wait_event_notifier_noflush(void)
 383 {
 384     EventNotifierTestData data = { .n = 0 };
 385     EventNotifierTestData dummy = { .n = 0, .active = 1 };
 386
 387     event_notifier_init(&data.e, false);
 388     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 389
 390     g_assert(!aio_poll(ctx, false));
 391     g_assert_cmpint(data.n, ==, 0);
 392
 393     /* Until there is an active descriptor, aio_poll may or may not call
 394      * event_ready_cb.  Still, it must not block.  */
 395     event_notifier_set(&data.e);
 396     g_assert(aio_poll(ctx, true));
 397     data.n = 0;
 398
 399     /* An active event notifier forces aio_poll to look at EventNotifiers.  */
 400     event_notifier_init(&dummy.e, false);
 401     aio_set_event_notifier(ctx, &dummy.e, event_ready_cb);
 402
 403     event_notifier_set(&data.e);
 404     g_assert(aio_poll(ctx, false));
 405     g_assert_cmpint(data.n, ==, 1);
 406     g_assert(!aio_poll(ctx, false));
 407     g_assert_cmpint(data.n, ==, 1);
 408
 409     event_notifier_set(&data.e);
 410     g_assert(aio_poll(ctx, false));
 411     g_assert_cmpint(data.n, ==, 2);
 412     g_assert(!aio_poll(ctx, false));
 413     g_assert_cmpint(data.n, ==, 2);
 414
 415     event_notifier_set(&dummy.e);
 416     wait_until_inactive(&dummy);
 417     g_assert_cmpint(data.n, ==, 2);
 418     g_assert_cmpint(dummy.n, ==, 1);
 419     g_assert_cmpint(dummy.active, ==, 0);
 420
 421     aio_set_event_notifier(ctx, &dummy.e, NULL);
 422     event_notifier_cleanup(&dummy.e);
 423
 424     aio_set_event_notifier(ctx, &data.e, NULL);
 425     g_assert(!aio_poll(ctx, false));
 426     g_assert_cmpint(data.n, ==, 2);
 427
 428     event_notifier_cleanup(&data.e);
 429 }
 430
 431 static void test_timer_schedule(void)
 432 {
 433     TimerTestData data = { .n = 0, .ctx = ctx, .ns = SCALE_MS * 750LL,
 434                            .max = 2,
 435                            .clock_type = QEMU_CLOCK_VIRTUAL };
 436     EventNotifier e;
 437
 438     /* aio_poll will not block to wait for timers to complete unless it has
 439      * an fd to wait on. Fixing this breaks other tests. So create a dummy one.
 440      */
 441     event_notifier_init(&e, false);
 442     aio_set_event_notifier(ctx, &e, dummy_io_handler_read);
 443     aio_poll(ctx, false);
 444
 445     aio_timer_init(ctx, &data.timer, data.clock_type,
 446                    SCALE_NS, timer_test_cb, &data);
 447     timer_mod(&data.timer,
 448               qemu_clock_get_ns(data.clock_type) +
 449               data.ns);
 450
 451     g_assert_cmpint(data.n, ==, 0);
 452
 453     /* timer_mod may well cause an event notifer to have gone off,
 454      * so clear that
 455      */
 456     do {} while (aio_poll(ctx, false));
 457
 458     g_assert(!aio_poll(ctx, false));
 459     g_assert_cmpint(data.n, ==, 0);
 460
 461     g_usleep(1 * G_USEC_PER_SEC);
 462     g_assert_cmpint(data.n, ==, 0);
 463
 464     g_assert(aio_poll(ctx, false));
 465     g_assert_cmpint(data.n, ==, 1);
 466
 467     /* timer_mod called by our callback */
 468     do {} while (aio_poll(ctx, false));
 469
 470     g_assert(!aio_poll(ctx, false));
 471     g_assert_cmpint(data.n, ==, 1);
 472
 473     g_assert(aio_poll(ctx, true));
 474     g_assert_cmpint(data.n, ==, 2);
 475
 476     /* As max is now 2, an event notifier should not have gone off */
 477
 478     g_assert(!aio_poll(ctx, false));
 479     g_assert_cmpint(data.n, ==, 2);
 480
 481     aio_set_event_notifier(ctx, &e, NULL);
 482     event_notifier_cleanup(&e);
 483
 484     timer_del(&data.timer);
 485 }
 486
 487 /* Now the same tests, using the context as a GSource.  They are
 488  * very similar to the ones above, with g_main_context_iteration
 489  * replacing aio_poll.  However:
 490  * - sometimes both the AioContext and the glib main loop wake
 491  *   themselves up.  Hence, some "g_assert(!aio_poll(ctx, false));"
 492  *   are replaced by "while (g_main_context_iteration(NULL, false));".
 493  * - there is no exact replacement for a blocking wait.
 494  *   "while (g_main_context_iteration(NULL, true)" seems to work,
 495  *   but it is not documented _why_ it works.  For these tests a
 496  *   non-blocking loop like "while (g_main_context_iteration(NULL, false)"
 497  *   works well, and that's what I am using.
 498  */
 499
 500 static void test_source_notify(void)
 501 {
 502     while (g_main_context_iteration(NULL, false));
 503     aio_notify(ctx);
 504     g_assert(g_main_context_iteration(NULL, true));
 505     g_assert(!g_main_context_iteration(NULL, false));
 506 }
 507
 508 static void test_source_flush(void)
 509 {
 510     g_assert(!g_main_context_iteration(NULL, false));
 511     aio_notify(ctx);
 512     while (g_main_context_iteration(NULL, false));
 513     g_assert(!g_main_context_iteration(NULL, false));
 514 }
 515
 516 static void test_source_bh_schedule(void)
 517 {
 518     BHTestData data = { .n = 0 };
 519     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 520
 521     qemu_bh_schedule(data.bh);
 522     g_assert_cmpint(data.n, ==, 0);
 523
 524     g_assert(g_main_context_iteration(NULL, true));
 525     g_assert_cmpint(data.n, ==, 1);
 526
 527     g_assert(!g_main_context_iteration(NULL, false));
 528     g_assert_cmpint(data.n, ==, 1);
 529     qemu_bh_delete(data.bh);
 530 }
 531
 532 static void test_source_bh_schedule10(void)
 533 {
 534     BHTestData data = { .n = 0, .max = 10 };
 535     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 536
 537     qemu_bh_schedule(data.bh);
 538     g_assert_cmpint(data.n, ==, 0);
 539
 540     g_assert(g_main_context_iteration(NULL, false));
 541     g_assert_cmpint(data.n, ==, 1);
 542
 543     g_assert(g_main_context_iteration(NULL, true));
 544     g_assert_cmpint(data.n, ==, 2);
 545
 546     while (g_main_context_iteration(NULL, false));
 547     g_assert_cmpint(data.n, ==, 10);
 548
 549     g_assert(!g_main_context_iteration(NULL, false));
 550     g_assert_cmpint(data.n, ==, 10);
 551     qemu_bh_delete(data.bh);
 552 }
 553
 554 static void test_source_bh_cancel(void)
 555 {
 556     BHTestData data = { .n = 0 };
 557     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 558
 559     qemu_bh_schedule(data.bh);
 560     g_assert_cmpint(data.n, ==, 0);
 561
 562     qemu_bh_cancel(data.bh);
 563     g_assert_cmpint(data.n, ==, 0);
 564
 565     while (g_main_context_iteration(NULL, false));
 566     g_assert_cmpint(data.n, ==, 0);
 567     qemu_bh_delete(data.bh);
 568 }
 569
 570 static void test_source_bh_delete(void)
 571 {
 572     BHTestData data = { .n = 0 };
 573     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 574
 575     qemu_bh_schedule(data.bh);
 576     g_assert_cmpint(data.n, ==, 0);
 577
 578     qemu_bh_delete(data.bh);
 579     g_assert_cmpint(data.n, ==, 0);
 580
 581     while (g_main_context_iteration(NULL, false));
 582     g_assert_cmpint(data.n, ==, 0);
 583 }
 584
 585 static void test_source_bh_delete_from_cb(void)
 586 {
 587     BHTestData data1 = { .n = 0, .max = 1 };
 588
 589     data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
 590
 591     qemu_bh_schedule(data1.bh);
 592     g_assert_cmpint(data1.n, ==, 0);
 593
 594     g_main_context_iteration(NULL, true);
 595     g_assert_cmpint(data1.n, ==, data1.max);
 596     g_assert(data1.bh == NULL);
 597
 598     g_assert(!g_main_context_iteration(NULL, false));
 599 }
 600
 601 static void test_source_bh_delete_from_cb_many(void)
 602 {
 603     BHTestData data1 = { .n = 0, .max = 1 };
 604     BHTestData data2 = { .n = 0, .max = 3 };
 605     BHTestData data3 = { .n = 0, .max = 2 };
 606     BHTestData data4 = { .n = 0, .max = 4 };
 607
 608     data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
 609     data2.bh = aio_bh_new(ctx, bh_delete_cb, &data2);
 610     data3.bh = aio_bh_new(ctx, bh_delete_cb, &data3);
 611     data4.bh = aio_bh_new(ctx, bh_delete_cb, &data4);
 612
 613     qemu_bh_schedule(data1.bh);
 614     qemu_bh_schedule(data2.bh);
 615     qemu_bh_schedule(data3.bh);
 616     qemu_bh_schedule(data4.bh);
 617     g_assert_cmpint(data1.n, ==, 0);
 618     g_assert_cmpint(data2.n, ==, 0);
 619     g_assert_cmpint(data3.n, ==, 0);
 620     g_assert_cmpint(data4.n, ==, 0);
 621
 622     g_assert(g_main_context_iteration(NULL, false));
 623     g_assert_cmpint(data1.n, ==, 1);
 624     g_assert_cmpint(data2.n, ==, 1);
 625     g_assert_cmpint(data3.n, ==, 1);
 626     g_assert_cmpint(data4.n, ==, 1);
 627     g_assert(data1.bh == NULL);
 628
 629     while (g_main_context_iteration(NULL, false));
 630     g_assert_cmpint(data1.n, ==, data1.max);
 631     g_assert_cmpint(data2.n, ==, data2.max);
 632     g_assert_cmpint(data3.n, ==, data3.max);
 633     g_assert_cmpint(data4.n, ==, data4.max);
 634     g_assert(data1.bh == NULL);
 635     g_assert(data2.bh == NULL);
 636     g_assert(data3.bh == NULL);
 637     g_assert(data4.bh == NULL);
 638 }
 639
 640 static void test_source_bh_flush(void)
 641 {
 642     BHTestData data = { .n = 0 };
 643     data.bh = aio_bh_new(ctx, bh_test_cb, &data);
 644
 645     qemu_bh_schedule(data.bh);
 646     g_assert_cmpint(data.n, ==, 0);
 647
 648     g_assert(g_main_context_iteration(NULL, true));
 649     g_assert_cmpint(data.n, ==, 1);
 650
 651     g_assert(!g_main_context_iteration(NULL, false));
 652     g_assert_cmpint(data.n, ==, 1);
 653     qemu_bh_delete(data.bh);
 654 }
 655
 656 static void test_source_set_event_notifier(void)
 657 {
 658     EventNotifierTestData data = { .n = 0, .active = 0 };
 659     event_notifier_init(&data.e, false);
 660     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 661     while (g_main_context_iteration(NULL, false));
 662     g_assert_cmpint(data.n, ==, 0);
 663
 664     aio_set_event_notifier(ctx, &data.e, NULL);
 665     while (g_main_context_iteration(NULL, false));
 666     g_assert_cmpint(data.n, ==, 0);
 667     event_notifier_cleanup(&data.e);
 668 }
 669
 670 static void test_source_wait_event_notifier(void)
 671 {
 672     EventNotifierTestData data = { .n = 0, .active = 1 };
 673     event_notifier_init(&data.e, false);
 674     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 675     g_assert(g_main_context_iteration(NULL, false));
 676     g_assert_cmpint(data.n, ==, 0);
 677     g_assert_cmpint(data.active, ==, 1);
 678
 679     event_notifier_set(&data.e);
 680     g_assert(g_main_context_iteration(NULL, false));
 681     g_assert_cmpint(data.n, ==, 1);
 682     g_assert_cmpint(data.active, ==, 0);
 683
 684     while (g_main_context_iteration(NULL, false));
 685     g_assert_cmpint(data.n, ==, 1);
 686     g_assert_cmpint(data.active, ==, 0);
 687
 688     aio_set_event_notifier(ctx, &data.e, NULL);
 689     while (g_main_context_iteration(NULL, false));
 690     g_assert_cmpint(data.n, ==, 1);
 691
 692     event_notifier_cleanup(&data.e);
 693 }
 694
 695 static void test_source_flush_event_notifier(void)
 696 {
 697     EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
 698     event_notifier_init(&data.e, false);
 699     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 700     g_assert(g_main_context_iteration(NULL, false));
 701     g_assert_cmpint(data.n, ==, 0);
 702     g_assert_cmpint(data.active, ==, 10);
 703
 704     event_notifier_set(&data.e);
 705     g_assert(g_main_context_iteration(NULL, false));
 706     g_assert_cmpint(data.n, ==, 1);
 707     g_assert_cmpint(data.active, ==, 9);
 708     g_assert(g_main_context_iteration(NULL, false));
 709
 710     while (g_main_context_iteration(NULL, false));
 711     g_assert_cmpint(data.n, ==, 10);
 712     g_assert_cmpint(data.active, ==, 0);
 713     g_assert(!g_main_context_iteration(NULL, false));
 714
 715     aio_set_event_notifier(ctx, &data.e, NULL);
 716     while (g_main_context_iteration(NULL, false));
 717     event_notifier_cleanup(&data.e);
 718 }
 719
 720 static void test_source_wait_event_notifier_noflush(void)
 721 {
 722     EventNotifierTestData data = { .n = 0 };
 723     EventNotifierTestData dummy = { .n = 0, .active = 1 };
 724
 725     event_notifier_init(&data.e, false);
 726     aio_set_event_notifier(ctx, &data.e, event_ready_cb);
 727
 728     while (g_main_context_iteration(NULL, false));
 729     g_assert_cmpint(data.n, ==, 0);
 730
 731     /* Until there is an active descriptor, glib may or may not call
 732      * event_ready_cb.  Still, it must not block.  */
 733     event_notifier_set(&data.e);
 734     g_main_context_iteration(NULL, true);
 735     data.n = 0;
 736
 737     /* An active event notifier forces aio_poll to look at EventNotifiers.  */
 738     event_notifier_init(&dummy.e, false);
 739     aio_set_event_notifier(ctx, &dummy.e, event_ready_cb);
 740
 741     event_notifier_set(&data.e);
 742     g_assert(g_main_context_iteration(NULL, false));
 743     g_assert_cmpint(data.n, ==, 1);
 744     g_assert(!g_main_context_iteration(NULL, false));
 745     g_assert_cmpint(data.n, ==, 1);
 746
 747     event_notifier_set(&data.e);
 748     g_assert(g_main_context_iteration(NULL, false));
 749     g_assert_cmpint(data.n, ==, 2);
 750     g_assert(!g_main_context_iteration(NULL, false));
 751     g_assert_cmpint(data.n, ==, 2);
 752
 753     event_notifier_set(&dummy.e);
 754     while (g_main_context_iteration(NULL, false));
 755     g_assert_cmpint(data.n, ==, 2);
 756     g_assert_cmpint(dummy.n, ==, 1);
 757     g_assert_cmpint(dummy.active, ==, 0);
 758
 759     aio_set_event_notifier(ctx, &dummy.e, NULL);
 760     event_notifier_cleanup(&dummy.e);
 761
 762     aio_set_event_notifier(ctx, &data.e, NULL);
 763     while (g_main_context_iteration(NULL, false));
 764     g_assert_cmpint(data.n, ==, 2);
 765
 766     event_notifier_cleanup(&data.e);
 767 }
 768
 769 static void test_source_timer_schedule(void)
 770 {
 771     TimerTestData data = { .n = 0, .ctx = ctx, .ns = SCALE_MS * 750LL,
 772                            .max = 2,
 773                            .clock_type = QEMU_CLOCK_VIRTUAL };
 774     EventNotifier e;
 775     int64_t expiry;
 776
 777     /* aio_poll will not block to wait for timers to complete unless it has
 778      * an fd to wait on. Fixing this breaks other tests. So create a dummy one.
 779      */
 780     event_notifier_init(&e, false);
 781     aio_set_event_notifier(ctx, &e, dummy_io_handler_read);
 782     do {} while (g_main_context_iteration(NULL, false));
 783
 784     aio_timer_init(ctx, &data.timer, data.clock_type,
 785                    SCALE_NS, timer_test_cb, &data);
 786     expiry = qemu_clock_get_ns(data.clock_type) +
 787         data.ns;
 788     timer_mod(&data.timer, expiry);
 789
 790     g_assert_cmpint(data.n, ==, 0);
 791
 792     g_usleep(1 * G_USEC_PER_SEC);
 793     g_assert_cmpint(data.n, ==, 0);
 794
 795     g_assert(g_main_context_iteration(NULL, true));
 796     g_assert_cmpint(data.n, ==, 1);
 797     expiry += data.ns;
 798
 799     while (data.n < 2) {
 800         g_main_context_iteration(NULL, true);
 801     }
 802
 803     g_assert_cmpint(data.n, ==, 2);
 804     g_assert(qemu_clock_get_ns(data.clock_type) > expiry);
 805
 806     aio_set_event_notifier(ctx, &e, NULL);
 807     event_notifier_cleanup(&e);
 808
 809     timer_del(&data.timer);
 810 }
 811
 812
 813 /* End of tests.  */
 814
 815 int main(int argc, char **argv)
 816 {
 817     Error *local_error = NULL;
 818     GSource *src;
 819
 820     init_clocks();
 821
 822     ctx = aio_context_new(&local_error);
 823     if (!ctx) {
 824         error_report("Failed to create AIO Context: '%s'",
 825                      error_get_pretty(local_error));
 826         error_free(local_error);
 827         exit(1);
 828     }
 829     src = aio_get_g_source(ctx);
 830     g_source_attach(src, NULL);
 831     g_source_unref(src);
 832
 833     while (g_main_context_iteration(NULL, false));
 834
 835     g_test_init(&argc, &argv, NULL);
 836     g_test_add_func("/aio/notify",                  test_notify);
 837     g_test_add_func("/aio/acquire",                 test_acquire);
 838     g_test_add_func("/aio/bh/schedule",             test_bh_schedule);
 839     g_test_add_func("/aio/bh/schedule10",           test_bh_schedule10);
 840     g_test_add_func("/aio/bh/cancel",               test_bh_cancel);
 841     g_test_add_func("/aio/bh/delete",               test_bh_delete);
 842     g_test_add_func("/aio/bh/callback-delete/one",  test_bh_delete_from_cb);
 843     g_test_add_func("/aio/bh/callback-delete/many", test_bh_delete_from_cb_many);
 844     g_test_add_func("/aio/bh/flush",                test_bh_flush);
 845     g_test_add_func("/aio/event/add-remove",        test_set_event_notifier);
 846     g_test_add_func("/aio/event/wait",              test_wait_event_notifier);
 847     g_test_add_func("/aio/event/wait/no-flush-cb",  test_wait_event_notifier_noflush);
 848     g_test_add_func("/aio/event/flush",             test_flush_event_notifier);
 849     g_test_add_func("/aio/timer/schedule",          test_timer_schedule);
 850
 851     g_test_add_func("/aio-gsource/notify",                  test_source_notify);
 852     g_test_add_func("/aio-gsource/flush",                   test_source_flush);
 853     g_test_add_func("/aio-gsource/bh/schedule",             test_source_bh_schedule);
 854     g_test_add_func("/aio-gsource/bh/schedule10",           test_source_bh_schedule10);
 855     g_test_add_func("/aio-gsource/bh/cancel",               test_source_bh_cancel);
 856     g_test_add_func("/aio-gsource/bh/delete",               test_source_bh_delete);
 857     g_test_add_func("/aio-gsource/bh/callback-delete/one",  test_source_bh_delete_from_cb);
 858     g_test_add_func("/aio-gsource/bh/callback-delete/many", test_source_bh_delete_from_cb_many);
 859     g_test_add_func("/aio-gsource/bh/flush",                test_source_bh_flush);
 860     g_test_add_func("/aio-gsource/event/add-remove",        test_source_set_event_notifier);
 861     g_test_add_func("/aio-gsource/event/wait",              test_source_wait_event_notifier);
 862     g_test_add_func("/aio-gsource/event/wait/no-flush-cb",  test_source_wait_event_notifier_noflush);
 863     g_test_add_func("/aio-gsource/event/flush",             test_source_flush_event_notifier);
 864     g_test_add_func("/aio-gsource/timer/schedule",          test_source_timer_schedule);
 865     return g_test_run();
 866 }