1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "mojo/system/local_data_pipe.h" 6 7 #include <string.h> 8 9 #include "base/macros.h" 10 #include "base/memory/ref_counted.h" 11 #include "mojo/system/data_pipe.h" 12 #include "mojo/system/waiter.h" 13 #include "testing/gtest/include/gtest/gtest.h" 14 15 namespace mojo { 16 namespace system { 17 namespace { 18 19 const uint32_t kSizeOfOptions = 20 static_cast<uint32_t>(sizeof(MojoCreateDataPipeOptions)); 21 22 // Validate options. 23 TEST(LocalDataPipeTest, Creation) { 24 // Create using default options. 25 { 26 // Get default options. 27 MojoCreateDataPipeOptions default_options = {0}; 28 EXPECT_EQ( 29 MOJO_RESULT_OK, 30 DataPipe::ValidateCreateOptions(NullUserPointer(), &default_options)); 31 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(default_options)); 32 dp->ProducerClose(); 33 dp->ConsumerClose(); 34 } 35 36 // Create using non-default options. 37 { 38 const MojoCreateDataPipeOptions options = { 39 kSizeOfOptions, // |struct_size|. 40 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 41 1, // |element_num_bytes|. 42 1000 // |capacity_num_bytes|. 43 }; 44 MojoCreateDataPipeOptions validated_options = {0}; 45 EXPECT_EQ(MOJO_RESULT_OK, 46 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 47 &validated_options)); 48 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 49 dp->ProducerClose(); 50 dp->ConsumerClose(); 51 } 52 { 53 const MojoCreateDataPipeOptions options = { 54 kSizeOfOptions, // |struct_size|. 55 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 56 4, // |element_num_bytes|. 57 4000 // |capacity_num_bytes|. 58 }; 59 MojoCreateDataPipeOptions validated_options = {0}; 60 EXPECT_EQ(MOJO_RESULT_OK, 61 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 62 &validated_options)); 63 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 64 dp->ProducerClose(); 65 dp->ConsumerClose(); 66 } 67 { 68 const MojoCreateDataPipeOptions options = { 69 kSizeOfOptions, // |struct_size|. 70 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_MAY_DISCARD, // |flags|. 71 7, // |element_num_bytes|. 72 7000000 // |capacity_num_bytes|. 73 }; 74 MojoCreateDataPipeOptions validated_options = {0}; 75 EXPECT_EQ(MOJO_RESULT_OK, 76 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 77 &validated_options)); 78 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 79 dp->ProducerClose(); 80 dp->ConsumerClose(); 81 } 82 // Default capacity. 83 { 84 const MojoCreateDataPipeOptions options = { 85 kSizeOfOptions, // |struct_size|. 86 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_MAY_DISCARD, // |flags|. 87 100, // |element_num_bytes|. 88 0 // |capacity_num_bytes|. 89 }; 90 MojoCreateDataPipeOptions validated_options = {0}; 91 EXPECT_EQ(MOJO_RESULT_OK, 92 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 93 &validated_options)); 94 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 95 dp->ProducerClose(); 96 dp->ConsumerClose(); 97 } 98 } 99 100 TEST(LocalDataPipeTest, SimpleReadWrite) { 101 const MojoCreateDataPipeOptions options = { 102 kSizeOfOptions, // |struct_size|. 103 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 104 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 105 1000 * sizeof(int32_t) // |capacity_num_bytes|. 106 }; 107 MojoCreateDataPipeOptions validated_options = {0}; 108 EXPECT_EQ(MOJO_RESULT_OK, 109 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 110 &validated_options)); 111 112 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 113 114 int32_t elements[10] = {0}; 115 uint32_t num_bytes = 0; 116 117 // Try reading; nothing there yet. 118 num_bytes = static_cast<uint32_t>(arraysize(elements) * sizeof(elements[0])); 119 EXPECT_EQ( 120 MOJO_RESULT_SHOULD_WAIT, 121 dp->ConsumerReadData( 122 UserPointer<void>(elements), MakeUserPointer(&num_bytes), false)); 123 124 // Query; nothing there yet. 125 num_bytes = 0; 126 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 127 EXPECT_EQ(0u, num_bytes); 128 129 // Discard; nothing there yet. 130 num_bytes = static_cast<uint32_t>(5u * sizeof(elements[0])); 131 EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT, 132 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), false)); 133 134 // Read with invalid |num_bytes|. 135 num_bytes = sizeof(elements[0]) + 1; 136 EXPECT_EQ( 137 MOJO_RESULT_INVALID_ARGUMENT, 138 dp->ConsumerReadData( 139 UserPointer<void>(elements), MakeUserPointer(&num_bytes), false)); 140 141 // Write two elements. 142 elements[0] = 123; 143 elements[1] = 456; 144 num_bytes = static_cast<uint32_t>(2u * sizeof(elements[0])); 145 EXPECT_EQ(MOJO_RESULT_OK, 146 dp->ProducerWriteData(UserPointer<const void>(elements), 147 MakeUserPointer(&num_bytes), 148 false)); 149 // It should have written everything (even without "all or none"). 150 EXPECT_EQ(2u * sizeof(elements[0]), num_bytes); 151 152 // Query. 153 num_bytes = 0; 154 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 155 EXPECT_EQ(2 * sizeof(elements[0]), num_bytes); 156 157 // Read one element. 158 elements[0] = -1; 159 elements[1] = -1; 160 num_bytes = static_cast<uint32_t>(1u * sizeof(elements[0])); 161 EXPECT_EQ( 162 MOJO_RESULT_OK, 163 dp->ConsumerReadData( 164 UserPointer<void>(elements), MakeUserPointer(&num_bytes), false)); 165 EXPECT_EQ(1u * sizeof(elements[0]), num_bytes); 166 EXPECT_EQ(123, elements[0]); 167 EXPECT_EQ(-1, elements[1]); 168 169 // Query. 170 num_bytes = 0; 171 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 172 EXPECT_EQ(1 * sizeof(elements[0]), num_bytes); 173 174 // Try to read two elements, with "all or none". 175 elements[0] = -1; 176 elements[1] = -1; 177 num_bytes = static_cast<uint32_t>(2u * sizeof(elements[0])); 178 EXPECT_EQ( 179 MOJO_RESULT_OUT_OF_RANGE, 180 dp->ConsumerReadData( 181 UserPointer<void>(elements), MakeUserPointer(&num_bytes), true)); 182 EXPECT_EQ(-1, elements[0]); 183 EXPECT_EQ(-1, elements[1]); 184 185 // Try to read two elements, without "all or none". 186 elements[0] = -1; 187 elements[1] = -1; 188 num_bytes = static_cast<uint32_t>(2u * sizeof(elements[0])); 189 EXPECT_EQ( 190 MOJO_RESULT_OK, 191 dp->ConsumerReadData( 192 UserPointer<void>(elements), MakeUserPointer(&num_bytes), false)); 193 EXPECT_EQ(456, elements[0]); 194 EXPECT_EQ(-1, elements[1]); 195 196 // Query. 197 num_bytes = 0; 198 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 199 EXPECT_EQ(0u, num_bytes); 200 201 dp->ProducerClose(); 202 dp->ConsumerClose(); 203 } 204 205 // Note: The "basic" waiting tests test that the "wait states" are correct in 206 // various situations; they don't test that waiters are properly awoken on state 207 // changes. (For that, we need to use multiple threads.) 208 TEST(LocalDataPipeTest, BasicProducerWaiting) { 209 // Note: We take advantage of the fact that for |LocalDataPipe|, capacities 210 // are strict maximums. This is not guaranteed by the API. 211 212 const MojoCreateDataPipeOptions options = { 213 kSizeOfOptions, // |struct_size|. 214 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 215 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 216 2 * sizeof(int32_t) // |capacity_num_bytes|. 217 }; 218 MojoCreateDataPipeOptions validated_options = {0}; 219 EXPECT_EQ(MOJO_RESULT_OK, 220 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 221 &validated_options)); 222 223 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 224 Waiter waiter; 225 uint32_t context = 0; 226 HandleSignalsState hss; 227 228 // Never readable. 229 waiter.Init(); 230 hss = HandleSignalsState(); 231 EXPECT_EQ( 232 MOJO_RESULT_FAILED_PRECONDITION, 233 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 12, &hss)); 234 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 235 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 236 237 // Already writable. 238 waiter.Init(); 239 hss = HandleSignalsState(); 240 EXPECT_EQ( 241 MOJO_RESULT_ALREADY_EXISTS, 242 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 34, &hss)); 243 244 // Write two elements. 245 int32_t elements[2] = {123, 456}; 246 uint32_t num_bytes = static_cast<uint32_t>(2u * sizeof(elements[0])); 247 EXPECT_EQ(MOJO_RESULT_OK, 248 dp->ProducerWriteData(UserPointer<const void>(elements), 249 MakeUserPointer(&num_bytes), 250 true)); 251 EXPECT_EQ(static_cast<uint32_t>(2u * sizeof(elements[0])), num_bytes); 252 253 // Adding a waiter should now succeed. 254 waiter.Init(); 255 ASSERT_EQ( 256 MOJO_RESULT_OK, 257 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 56, nullptr)); 258 // And it shouldn't be writable yet. 259 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, nullptr)); 260 hss = HandleSignalsState(); 261 dp->ProducerRemoveWaiter(&waiter, &hss); 262 EXPECT_EQ(0u, hss.satisfied_signals); 263 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 264 265 // Do it again. 266 waiter.Init(); 267 ASSERT_EQ( 268 MOJO_RESULT_OK, 269 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 78, nullptr)); 270 271 // Read one element. 272 elements[0] = -1; 273 elements[1] = -1; 274 num_bytes = static_cast<uint32_t>(1u * sizeof(elements[0])); 275 EXPECT_EQ( 276 MOJO_RESULT_OK, 277 dp->ConsumerReadData( 278 UserPointer<void>(elements), MakeUserPointer(&num_bytes), true)); 279 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 280 EXPECT_EQ(123, elements[0]); 281 EXPECT_EQ(-1, elements[1]); 282 283 // Waiting should now succeed. 284 EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(1000, &context)); 285 EXPECT_EQ(78u, context); 286 hss = HandleSignalsState(); 287 dp->ProducerRemoveWaiter(&waiter, &hss); 288 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 289 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 290 291 // Try writing, using a two-phase write. 292 void* buffer = nullptr; 293 num_bytes = static_cast<uint32_t>(3u * sizeof(elements[0])); 294 EXPECT_EQ(MOJO_RESULT_OK, 295 dp->ProducerBeginWriteData( 296 MakeUserPointer(&buffer), MakeUserPointer(&num_bytes), false)); 297 EXPECT_TRUE(buffer); 298 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 299 300 static_cast<int32_t*>(buffer)[0] = 789; 301 EXPECT_EQ(MOJO_RESULT_OK, 302 dp->ProducerEndWriteData( 303 static_cast<uint32_t>(1u * sizeof(elements[0])))); 304 305 // Add a waiter. 306 waiter.Init(); 307 ASSERT_EQ( 308 MOJO_RESULT_OK, 309 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 90, nullptr)); 310 311 // Read one element, using a two-phase read. 312 const void* read_buffer = nullptr; 313 num_bytes = 0u; 314 EXPECT_EQ( 315 MOJO_RESULT_OK, 316 dp->ConsumerBeginReadData( 317 MakeUserPointer(&read_buffer), MakeUserPointer(&num_bytes), false)); 318 EXPECT_TRUE(read_buffer); 319 // Since we only read one element (after having written three in all), the 320 // two-phase read should only allow us to read one. This checks an 321 // implementation detail! 322 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 323 EXPECT_EQ(456, static_cast<const int32_t*>(read_buffer)[0]); 324 EXPECT_EQ( 325 MOJO_RESULT_OK, 326 dp->ConsumerEndReadData(static_cast<uint32_t>(1u * sizeof(elements[0])))); 327 328 // Waiting should succeed. 329 EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(1000, &context)); 330 EXPECT_EQ(90u, context); 331 hss = HandleSignalsState(); 332 dp->ProducerRemoveWaiter(&waiter, &hss); 333 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 334 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 335 336 // Write one element. 337 elements[0] = 123; 338 num_bytes = static_cast<uint32_t>(1u * sizeof(elements[0])); 339 EXPECT_EQ(MOJO_RESULT_OK, 340 dp->ProducerWriteData(UserPointer<const void>(elements), 341 MakeUserPointer(&num_bytes), 342 false)); 343 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 344 345 // Add a waiter. 346 waiter.Init(); 347 ASSERT_EQ( 348 MOJO_RESULT_OK, 349 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 12, nullptr)); 350 351 // Close the consumer. 352 dp->ConsumerClose(); 353 354 // It should now be never-writable. 355 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, waiter.Wait(1000, &context)); 356 EXPECT_EQ(12u, context); 357 hss = HandleSignalsState(); 358 dp->ProducerRemoveWaiter(&waiter, &hss); 359 EXPECT_EQ(0u, hss.satisfied_signals); 360 EXPECT_EQ(0u, hss.satisfiable_signals); 361 362 dp->ProducerClose(); 363 } 364 365 TEST(LocalDataPipeTest, BasicConsumerWaiting) { 366 const MojoCreateDataPipeOptions options = { 367 kSizeOfOptions, // |struct_size|. 368 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 369 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 370 1000 * sizeof(int32_t) // |capacity_num_bytes|. 371 }; 372 MojoCreateDataPipeOptions validated_options = {0}; 373 EXPECT_EQ(MOJO_RESULT_OK, 374 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 375 &validated_options)); 376 377 { 378 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 379 Waiter waiter; 380 uint32_t context = 0; 381 HandleSignalsState hss; 382 383 // Never writable. 384 waiter.Init(); 385 hss = HandleSignalsState(); 386 EXPECT_EQ( 387 MOJO_RESULT_FAILED_PRECONDITION, 388 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 12, &hss)); 389 EXPECT_EQ(0u, hss.satisfied_signals); 390 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 391 392 // Not yet readable. 393 waiter.Init(); 394 ASSERT_EQ(MOJO_RESULT_OK, 395 dp->ConsumerAddWaiter( 396 &waiter, MOJO_HANDLE_SIGNAL_READABLE, 34, nullptr)); 397 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, nullptr)); 398 hss = HandleSignalsState(); 399 dp->ConsumerRemoveWaiter(&waiter, &hss); 400 EXPECT_EQ(0u, hss.satisfied_signals); 401 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 402 403 // Write two elements. 404 int32_t elements[2] = {123, 456}; 405 uint32_t num_bytes = static_cast<uint32_t>(2u * sizeof(elements[0])); 406 EXPECT_EQ(MOJO_RESULT_OK, 407 dp->ProducerWriteData(UserPointer<const void>(elements), 408 MakeUserPointer(&num_bytes), 409 true)); 410 411 // Should already be readable. 412 waiter.Init(); 413 hss = HandleSignalsState(); 414 EXPECT_EQ( 415 MOJO_RESULT_ALREADY_EXISTS, 416 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 56, &hss)); 417 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 418 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 419 420 // Discard one element. 421 num_bytes = static_cast<uint32_t>(1u * sizeof(elements[0])); 422 EXPECT_EQ(MOJO_RESULT_OK, 423 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 424 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 425 426 // Should still be readable. 427 waiter.Init(); 428 hss = HandleSignalsState(); 429 EXPECT_EQ( 430 MOJO_RESULT_ALREADY_EXISTS, 431 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 78, &hss)); 432 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 433 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 434 435 // Read one element. 436 elements[0] = -1; 437 elements[1] = -1; 438 num_bytes = static_cast<uint32_t>(1u * sizeof(elements[0])); 439 EXPECT_EQ( 440 MOJO_RESULT_OK, 441 dp->ConsumerReadData( 442 UserPointer<void>(elements), MakeUserPointer(&num_bytes), true)); 443 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 444 EXPECT_EQ(456, elements[0]); 445 EXPECT_EQ(-1, elements[1]); 446 447 // Adding a waiter should now succeed. 448 waiter.Init(); 449 ASSERT_EQ(MOJO_RESULT_OK, 450 dp->ConsumerAddWaiter( 451 &waiter, MOJO_HANDLE_SIGNAL_READABLE, 90, nullptr)); 452 453 // Write one element. 454 elements[0] = 789; 455 elements[1] = -1; 456 num_bytes = static_cast<uint32_t>(1u * sizeof(elements[0])); 457 EXPECT_EQ(MOJO_RESULT_OK, 458 dp->ProducerWriteData(UserPointer<const void>(elements), 459 MakeUserPointer(&num_bytes), 460 true)); 461 462 // Waiting should now succeed. 463 EXPECT_EQ(MOJO_RESULT_OK, waiter.Wait(1000, &context)); 464 EXPECT_EQ(90u, context); 465 hss = HandleSignalsState(); 466 dp->ConsumerRemoveWaiter(&waiter, &hss); 467 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 468 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 469 470 // Close the producer. 471 dp->ProducerClose(); 472 473 // Should still be readable. 474 waiter.Init(); 475 hss = HandleSignalsState(); 476 EXPECT_EQ( 477 MOJO_RESULT_ALREADY_EXISTS, 478 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 12, &hss)); 479 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 480 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 481 482 // Read one element. 483 elements[0] = -1; 484 elements[1] = -1; 485 num_bytes = static_cast<uint32_t>(1u * sizeof(elements[0])); 486 EXPECT_EQ( 487 MOJO_RESULT_OK, 488 dp->ConsumerReadData( 489 UserPointer<void>(elements), MakeUserPointer(&num_bytes), true)); 490 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 491 EXPECT_EQ(789, elements[0]); 492 EXPECT_EQ(-1, elements[1]); 493 494 // Should be never-readable. 495 waiter.Init(); 496 hss = HandleSignalsState(); 497 EXPECT_EQ( 498 MOJO_RESULT_FAILED_PRECONDITION, 499 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 34, &hss)); 500 EXPECT_EQ(0u, hss.satisfied_signals); 501 EXPECT_EQ(0u, hss.satisfiable_signals); 502 503 dp->ConsumerClose(); 504 } 505 506 // Test with two-phase APIs and closing the producer with an active consumer 507 // waiter. 508 { 509 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 510 Waiter waiter; 511 uint32_t context = 0; 512 HandleSignalsState hss; 513 514 // Write two elements. 515 int32_t* elements = nullptr; 516 void* buffer = nullptr; 517 // Request room for three (but we'll only write two). 518 uint32_t num_bytes = static_cast<uint32_t>(3u * sizeof(elements[0])); 519 EXPECT_EQ(MOJO_RESULT_OK, 520 dp->ProducerBeginWriteData( 521 MakeUserPointer(&buffer), MakeUserPointer(&num_bytes), true)); 522 EXPECT_TRUE(buffer); 523 EXPECT_GE(num_bytes, static_cast<uint32_t>(3u * sizeof(elements[0]))); 524 elements = static_cast<int32_t*>(buffer); 525 elements[0] = 123; 526 elements[1] = 456; 527 EXPECT_EQ(MOJO_RESULT_OK, 528 dp->ProducerEndWriteData( 529 static_cast<uint32_t>(2u * sizeof(elements[0])))); 530 531 // Should already be readable. 532 waiter.Init(); 533 hss = HandleSignalsState(); 534 EXPECT_EQ( 535 MOJO_RESULT_ALREADY_EXISTS, 536 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 12, &hss)); 537 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 538 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 539 540 // Read one element. 541 // Request two in all-or-none mode, but only read one. 542 const void* read_buffer = nullptr; 543 num_bytes = static_cast<uint32_t>(2u * sizeof(elements[0])); 544 EXPECT_EQ( 545 MOJO_RESULT_OK, 546 dp->ConsumerBeginReadData( 547 MakeUserPointer(&read_buffer), MakeUserPointer(&num_bytes), true)); 548 EXPECT_TRUE(read_buffer); 549 EXPECT_EQ(static_cast<uint32_t>(2u * sizeof(elements[0])), num_bytes); 550 const int32_t* read_elements = static_cast<const int32_t*>(read_buffer); 551 EXPECT_EQ(123, read_elements[0]); 552 EXPECT_EQ(MOJO_RESULT_OK, 553 dp->ConsumerEndReadData( 554 static_cast<uint32_t>(1u * sizeof(elements[0])))); 555 556 // Should still be readable. 557 waiter.Init(); 558 hss = HandleSignalsState(); 559 EXPECT_EQ( 560 MOJO_RESULT_ALREADY_EXISTS, 561 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 34, &hss)); 562 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 563 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 564 565 // Read one element. 566 // Request three, but not in all-or-none mode. 567 read_buffer = nullptr; 568 num_bytes = static_cast<uint32_t>(3u * sizeof(elements[0])); 569 EXPECT_EQ( 570 MOJO_RESULT_OK, 571 dp->ConsumerBeginReadData( 572 MakeUserPointer(&read_buffer), MakeUserPointer(&num_bytes), false)); 573 EXPECT_TRUE(read_buffer); 574 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(elements[0])), num_bytes); 575 read_elements = static_cast<const int32_t*>(read_buffer); 576 EXPECT_EQ(456, read_elements[0]); 577 EXPECT_EQ(MOJO_RESULT_OK, 578 dp->ConsumerEndReadData( 579 static_cast<uint32_t>(1u * sizeof(elements[0])))); 580 581 // Adding a waiter should now succeed. 582 waiter.Init(); 583 ASSERT_EQ(MOJO_RESULT_OK, 584 dp->ConsumerAddWaiter( 585 &waiter, MOJO_HANDLE_SIGNAL_READABLE, 56, nullptr)); 586 587 // Close the producer. 588 dp->ProducerClose(); 589 590 // Should be never-readable. 591 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, waiter.Wait(1000, &context)); 592 EXPECT_EQ(56u, context); 593 hss = HandleSignalsState(); 594 dp->ConsumerRemoveWaiter(&waiter, &hss); 595 EXPECT_EQ(0u, hss.satisfied_signals); 596 EXPECT_EQ(0u, hss.satisfiable_signals); 597 598 dp->ConsumerClose(); 599 } 600 } 601 602 // Tests that data pipes aren't writable/readable during two-phase writes/reads. 603 TEST(LocalDataPipeTest, BasicTwoPhaseWaiting) { 604 const MojoCreateDataPipeOptions options = { 605 kSizeOfOptions, // |struct_size|. 606 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 607 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 608 1000 * sizeof(int32_t) // |capacity_num_bytes|. 609 }; 610 MojoCreateDataPipeOptions validated_options = {0}; 611 EXPECT_EQ(MOJO_RESULT_OK, 612 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 613 &validated_options)); 614 615 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 616 Waiter waiter; 617 HandleSignalsState hss; 618 619 // It should be writable. 620 waiter.Init(); 621 hss = HandleSignalsState(); 622 EXPECT_EQ( 623 MOJO_RESULT_ALREADY_EXISTS, 624 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 0, &hss)); 625 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 626 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 627 628 uint32_t num_bytes = static_cast<uint32_t>(1u * sizeof(int32_t)); 629 void* write_ptr = nullptr; 630 EXPECT_EQ( 631 MOJO_RESULT_OK, 632 dp->ProducerBeginWriteData( 633 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), false)); 634 EXPECT_TRUE(write_ptr); 635 EXPECT_GE(num_bytes, static_cast<uint32_t>(1u * sizeof(int32_t))); 636 637 // At this point, it shouldn't be writable. 638 waiter.Init(); 639 ASSERT_EQ( 640 MOJO_RESULT_OK, 641 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 1, nullptr)); 642 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, nullptr)); 643 hss = HandleSignalsState(); 644 dp->ProducerRemoveWaiter(&waiter, &hss); 645 EXPECT_EQ(0u, hss.satisfied_signals); 646 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 647 648 // It shouldn't be readable yet either. 649 waiter.Init(); 650 ASSERT_EQ( 651 MOJO_RESULT_OK, 652 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 2, nullptr)); 653 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, nullptr)); 654 hss = HandleSignalsState(); 655 dp->ConsumerRemoveWaiter(&waiter, &hss); 656 EXPECT_EQ(0u, hss.satisfied_signals); 657 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 658 659 static_cast<int32_t*>(write_ptr)[0] = 123; 660 EXPECT_EQ( 661 MOJO_RESULT_OK, 662 dp->ProducerEndWriteData(static_cast<uint32_t>(1u * sizeof(int32_t)))); 663 664 // It should be writable again. 665 waiter.Init(); 666 hss = HandleSignalsState(); 667 EXPECT_EQ( 668 MOJO_RESULT_ALREADY_EXISTS, 669 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 3, &hss)); 670 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 671 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 672 673 // And readable. 674 waiter.Init(); 675 hss = HandleSignalsState(); 676 EXPECT_EQ( 677 MOJO_RESULT_ALREADY_EXISTS, 678 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 4, &hss)); 679 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 680 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 681 682 // Start another two-phase write and check that it's readable even in the 683 // middle of it. 684 num_bytes = static_cast<uint32_t>(1u * sizeof(int32_t)); 685 write_ptr = nullptr; 686 EXPECT_EQ( 687 MOJO_RESULT_OK, 688 dp->ProducerBeginWriteData( 689 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), false)); 690 EXPECT_TRUE(write_ptr); 691 EXPECT_GE(num_bytes, static_cast<uint32_t>(1u * sizeof(int32_t))); 692 693 // It should be readable. 694 waiter.Init(); 695 hss = HandleSignalsState(); 696 EXPECT_EQ( 697 MOJO_RESULT_ALREADY_EXISTS, 698 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 5, &hss)); 699 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 700 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 701 702 // End the two-phase write without writing anything. 703 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(0u)); 704 705 // Start a two-phase read. 706 num_bytes = static_cast<uint32_t>(1u * sizeof(int32_t)); 707 const void* read_ptr = nullptr; 708 EXPECT_EQ( 709 MOJO_RESULT_OK, 710 dp->ConsumerBeginReadData( 711 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), false)); 712 EXPECT_TRUE(read_ptr); 713 EXPECT_EQ(static_cast<uint32_t>(1u * sizeof(int32_t)), num_bytes); 714 715 // At this point, it should still be writable. 716 waiter.Init(); 717 hss = HandleSignalsState(); 718 EXPECT_EQ( 719 MOJO_RESULT_ALREADY_EXISTS, 720 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 6, &hss)); 721 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 722 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 723 724 // But not readable. 725 waiter.Init(); 726 ASSERT_EQ( 727 MOJO_RESULT_OK, 728 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 7, nullptr)); 729 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, nullptr)); 730 hss = HandleSignalsState(); 731 dp->ConsumerRemoveWaiter(&waiter, &hss); 732 EXPECT_EQ(0u, hss.satisfied_signals); 733 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 734 735 // End the two-phase read without reading anything. 736 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerEndReadData(0u)); 737 738 // It should be readable again. 739 waiter.Init(); 740 hss = HandleSignalsState(); 741 EXPECT_EQ( 742 MOJO_RESULT_ALREADY_EXISTS, 743 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 8, &hss)); 744 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 745 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 746 747 dp->ProducerClose(); 748 dp->ConsumerClose(); 749 } 750 751 // Test that a "may discard" data pipe is writable even when it's full. 752 TEST(LocalDataPipeTest, BasicMayDiscardWaiting) { 753 const MojoCreateDataPipeOptions options = { 754 kSizeOfOptions, // |struct_size|. 755 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_MAY_DISCARD, // |flags|. 756 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 757 1 * sizeof(int32_t) // |capacity_num_bytes|. 758 }; 759 MojoCreateDataPipeOptions validated_options = {0}; 760 EXPECT_EQ(MOJO_RESULT_OK, 761 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 762 &validated_options)); 763 764 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 765 Waiter waiter; 766 HandleSignalsState hss; 767 768 // Writable. 769 waiter.Init(); 770 hss = HandleSignalsState(); 771 EXPECT_EQ( 772 MOJO_RESULT_ALREADY_EXISTS, 773 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 0, &hss)); 774 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 775 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 776 777 // Not readable. 778 waiter.Init(); 779 ASSERT_EQ( 780 MOJO_RESULT_OK, 781 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 1, nullptr)); 782 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, nullptr)); 783 hss = HandleSignalsState(); 784 dp->ConsumerRemoveWaiter(&waiter, &hss); 785 EXPECT_EQ(0u, hss.satisfied_signals); 786 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 787 788 uint32_t num_bytes = static_cast<uint32_t>(sizeof(int32_t)); 789 int32_t element = 123; 790 EXPECT_EQ(MOJO_RESULT_OK, 791 dp->ProducerWriteData(UserPointer<const void>(&element), 792 MakeUserPointer(&num_bytes), 793 false)); 794 EXPECT_EQ(static_cast<uint32_t>(sizeof(int32_t)), num_bytes); 795 796 // Still writable (even though it's full). 797 waiter.Init(); 798 hss = HandleSignalsState(); 799 EXPECT_EQ( 800 MOJO_RESULT_ALREADY_EXISTS, 801 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 2, &hss)); 802 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 803 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 804 805 // Now readable. 806 waiter.Init(); 807 hss = HandleSignalsState(); 808 EXPECT_EQ( 809 MOJO_RESULT_ALREADY_EXISTS, 810 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 3, &hss)); 811 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 812 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 813 814 // Overwrite that element. 815 num_bytes = static_cast<uint32_t>(sizeof(int32_t)); 816 element = 456; 817 EXPECT_EQ(MOJO_RESULT_OK, 818 dp->ProducerWriteData(UserPointer<const void>(&element), 819 MakeUserPointer(&num_bytes), 820 false)); 821 EXPECT_EQ(static_cast<uint32_t>(sizeof(int32_t)), num_bytes); 822 823 // Still writable. 824 waiter.Init(); 825 hss = HandleSignalsState(); 826 EXPECT_EQ( 827 MOJO_RESULT_ALREADY_EXISTS, 828 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 4, &hss)); 829 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 830 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 831 832 // And still readable. 833 waiter.Init(); 834 hss = HandleSignalsState(); 835 EXPECT_EQ( 836 MOJO_RESULT_ALREADY_EXISTS, 837 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 5, &hss)); 838 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals); 839 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 840 841 // Read that element. 842 num_bytes = static_cast<uint32_t>(sizeof(int32_t)); 843 element = 0; 844 EXPECT_EQ( 845 MOJO_RESULT_OK, 846 dp->ConsumerReadData( 847 UserPointer<void>(&element), MakeUserPointer(&num_bytes), false)); 848 EXPECT_EQ(static_cast<uint32_t>(sizeof(int32_t)), num_bytes); 849 EXPECT_EQ(456, element); 850 851 // Still writable. 852 waiter.Init(); 853 hss = HandleSignalsState(); 854 EXPECT_EQ( 855 MOJO_RESULT_ALREADY_EXISTS, 856 dp->ProducerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_WRITABLE, 6, &hss)); 857 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfied_signals); 858 EXPECT_EQ(MOJO_HANDLE_SIGNAL_WRITABLE, hss.satisfiable_signals); 859 860 // No longer readable. 861 waiter.Init(); 862 ASSERT_EQ( 863 MOJO_RESULT_OK, 864 dp->ConsumerAddWaiter(&waiter, MOJO_HANDLE_SIGNAL_READABLE, 7, nullptr)); 865 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, nullptr)); 866 hss = HandleSignalsState(); 867 dp->ConsumerRemoveWaiter(&waiter, &hss); 868 EXPECT_EQ(0u, hss.satisfied_signals); 869 EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfiable_signals); 870 871 dp->ProducerClose(); 872 dp->ConsumerClose(); 873 } 874 875 void Seq(int32_t start, size_t count, int32_t* out) { 876 for (size_t i = 0; i < count; i++) 877 out[i] = start + static_cast<int32_t>(i); 878 } 879 880 TEST(LocalDataPipeTest, MayDiscard) { 881 const MojoCreateDataPipeOptions options = { 882 kSizeOfOptions, // |struct_size|. 883 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_MAY_DISCARD, // |flags|. 884 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 885 10 * sizeof(int32_t) // |capacity_num_bytes|. 886 }; 887 MojoCreateDataPipeOptions validated_options = {0}; 888 EXPECT_EQ(MOJO_RESULT_OK, 889 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 890 &validated_options)); 891 892 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 893 894 int32_t buffer[100] = {0}; 895 uint32_t num_bytes = 0; 896 897 num_bytes = 20u * sizeof(int32_t); 898 Seq(0, arraysize(buffer), buffer); 899 // Try writing more than capacity. (This test relies on the implementation 900 // enforcing the capacity strictly.) 901 EXPECT_EQ( 902 MOJO_RESULT_OK, 903 dp->ProducerWriteData( 904 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), false)); 905 EXPECT_EQ(10u * sizeof(int32_t), num_bytes); 906 907 // Read half of what we wrote. 908 num_bytes = 5u * sizeof(int32_t); 909 memset(buffer, 0xab, sizeof(buffer)); 910 EXPECT_EQ(MOJO_RESULT_OK, 911 dp->ConsumerReadData( 912 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), false)); 913 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 914 int32_t expected_buffer[100]; 915 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 916 Seq(0, 5u, expected_buffer); 917 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 918 // Internally, a circular buffer would now look like: 919 // -, -, -, -, -, 5, 6, 7, 8, 9 920 921 // Write a bit more than the space that's available. 922 num_bytes = 8u * sizeof(int32_t); 923 Seq(100, arraysize(buffer), buffer); 924 EXPECT_EQ( 925 MOJO_RESULT_OK, 926 dp->ProducerWriteData( 927 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), false)); 928 EXPECT_EQ(8u * sizeof(int32_t), num_bytes); 929 // Internally, a circular buffer would now look like: 930 // 100, 101, 102, 103, 104, 105, 106, 107, 8, 9 931 932 // Read half of what's available. 933 num_bytes = 5u * sizeof(int32_t); 934 memset(buffer, 0xab, sizeof(buffer)); 935 EXPECT_EQ(MOJO_RESULT_OK, 936 dp->ConsumerReadData( 937 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), false)); 938 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 939 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 940 expected_buffer[0] = 8; 941 expected_buffer[1] = 9; 942 expected_buffer[2] = 100; 943 expected_buffer[3] = 101; 944 expected_buffer[4] = 102; 945 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 946 // Internally, a circular buffer would now look like: 947 // -, -, -, 103, 104, 105, 106, 107, -, - 948 949 // Write one integer. 950 num_bytes = 1u * sizeof(int32_t); 951 Seq(200, arraysize(buffer), buffer); 952 EXPECT_EQ( 953 MOJO_RESULT_OK, 954 dp->ProducerWriteData( 955 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), false)); 956 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 957 // Internally, a circular buffer would now look like: 958 // -, -, -, 103, 104, 105, 106, 107, 200, - 959 960 // Write five more. 961 num_bytes = 5u * sizeof(int32_t); 962 Seq(300, arraysize(buffer), buffer); 963 EXPECT_EQ( 964 MOJO_RESULT_OK, 965 dp->ProducerWriteData( 966 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), false)); 967 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 968 // Internally, a circular buffer would now look like: 969 // 301, 302, 303, 304, 104, 105, 106, 107, 200, 300 970 971 // Read it all. 972 num_bytes = sizeof(buffer); 973 memset(buffer, 0xab, sizeof(buffer)); 974 EXPECT_EQ(MOJO_RESULT_OK, 975 dp->ConsumerReadData( 976 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), false)); 977 EXPECT_EQ(10u * sizeof(int32_t), num_bytes); 978 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 979 expected_buffer[0] = 104; 980 expected_buffer[1] = 105; 981 expected_buffer[2] = 106; 982 expected_buffer[3] = 107; 983 expected_buffer[4] = 200; 984 expected_buffer[5] = 300; 985 expected_buffer[6] = 301; 986 expected_buffer[7] = 302; 987 expected_buffer[8] = 303; 988 expected_buffer[9] = 304; 989 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 990 991 // Test two-phase writes, including in all-or-none mode. 992 // Note: Again, the following depends on an implementation detail -- namely 993 // that the write pointer will point at the 5th element of the buffer (and the 994 // buffer has exactly the capacity requested). 995 996 num_bytes = 0u; 997 void* write_ptr = nullptr; 998 EXPECT_EQ( 999 MOJO_RESULT_OK, 1000 dp->ProducerBeginWriteData( 1001 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), false)); 1002 EXPECT_TRUE(write_ptr); 1003 EXPECT_EQ(6u * sizeof(int32_t), num_bytes); 1004 Seq(400, 6, static_cast<int32_t*>(write_ptr)); 1005 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(6u * sizeof(int32_t))); 1006 // Internally, a circular buffer would now look like: 1007 // -, -, -, -, 400, 401, 402, 403, 404, 405 1008 1009 // |ProducerBeginWriteData()| ignores |*num_bytes| except in "all-or-none" 1010 // mode. 1011 num_bytes = 6u * sizeof(int32_t); 1012 write_ptr = nullptr; 1013 EXPECT_EQ( 1014 MOJO_RESULT_OK, 1015 dp->ProducerBeginWriteData( 1016 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), false)); 1017 EXPECT_EQ(4u * sizeof(int32_t), num_bytes); 1018 static_cast<int32_t*>(write_ptr)[0] = 500; 1019 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(1u * sizeof(int32_t))); 1020 // Internally, a circular buffer would now look like: 1021 // 500, -, -, -, 400, 401, 402, 403, 404, 405 1022 1023 // Requesting a 10-element buffer in all-or-none mode fails at this point. 1024 num_bytes = 10u * sizeof(int32_t); 1025 write_ptr = nullptr; 1026 EXPECT_EQ( 1027 MOJO_RESULT_OUT_OF_RANGE, 1028 dp->ProducerBeginWriteData( 1029 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), true)); 1030 1031 // But requesting, say, a 5-element (up to 9, really) buffer should be okay. 1032 // It will discard two elements. 1033 num_bytes = 5u * sizeof(int32_t); 1034 write_ptr = nullptr; 1035 EXPECT_EQ( 1036 MOJO_RESULT_OK, 1037 dp->ProducerBeginWriteData( 1038 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), true)); 1039 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 1040 // Only write 4 elements though. 1041 Seq(600, 4, static_cast<int32_t*>(write_ptr)); 1042 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(4u * sizeof(int32_t))); 1043 // Internally, a circular buffer would now look like: 1044 // 500, 600, 601, 602, 603, -, 402, 403, 404, 405 1045 1046 // Do this again. Make sure we can get a buffer all the way out to the end of 1047 // the internal buffer. 1048 num_bytes = 5u * sizeof(int32_t); 1049 write_ptr = nullptr; 1050 EXPECT_EQ( 1051 MOJO_RESULT_OK, 1052 dp->ProducerBeginWriteData( 1053 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), true)); 1054 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 1055 // Only write 3 elements though. 1056 Seq(700, 3, static_cast<int32_t*>(write_ptr)); 1057 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(3u * sizeof(int32_t))); 1058 // Internally, a circular buffer would now look like: 1059 // 500, 600, 601, 602, 603, 700, 701, 702, -, - 1060 1061 // Read everything. 1062 num_bytes = sizeof(buffer); 1063 memset(buffer, 0xab, sizeof(buffer)); 1064 EXPECT_EQ(MOJO_RESULT_OK, 1065 dp->ConsumerReadData( 1066 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), false)); 1067 EXPECT_EQ(8u * sizeof(int32_t), num_bytes); 1068 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1069 expected_buffer[0] = 500; 1070 expected_buffer[1] = 600; 1071 expected_buffer[2] = 601; 1072 expected_buffer[3] = 602; 1073 expected_buffer[4] = 603; 1074 expected_buffer[5] = 700; 1075 expected_buffer[6] = 701; 1076 expected_buffer[7] = 702; 1077 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1078 1079 dp->ProducerClose(); 1080 dp->ConsumerClose(); 1081 } 1082 1083 TEST(LocalDataPipeTest, AllOrNone) { 1084 const MojoCreateDataPipeOptions options = { 1085 kSizeOfOptions, // |struct_size|. 1086 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 1087 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 1088 10 * sizeof(int32_t) // |capacity_num_bytes|. 1089 }; 1090 MojoCreateDataPipeOptions validated_options = {0}; 1091 EXPECT_EQ(MOJO_RESULT_OK, 1092 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 1093 &validated_options)); 1094 1095 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1096 1097 // Try writing way too much. 1098 uint32_t num_bytes = 20u * sizeof(int32_t); 1099 int32_t buffer[100]; 1100 Seq(0, arraysize(buffer), buffer); 1101 EXPECT_EQ( 1102 MOJO_RESULT_OUT_OF_RANGE, 1103 dp->ProducerWriteData( 1104 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1105 1106 // Should still be empty. 1107 num_bytes = ~0u; 1108 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1109 EXPECT_EQ(0u, num_bytes); 1110 1111 // Write some data. 1112 num_bytes = 5u * sizeof(int32_t); 1113 Seq(100, arraysize(buffer), buffer); 1114 EXPECT_EQ( 1115 MOJO_RESULT_OK, 1116 dp->ProducerWriteData( 1117 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1118 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 1119 1120 // Half full. 1121 num_bytes = 0u; 1122 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1123 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 1124 1125 // Too much. 1126 num_bytes = 6u * sizeof(int32_t); 1127 Seq(200, arraysize(buffer), buffer); 1128 EXPECT_EQ( 1129 MOJO_RESULT_OUT_OF_RANGE, 1130 dp->ProducerWriteData( 1131 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1132 1133 // Try reading too much. 1134 num_bytes = 11u * sizeof(int32_t); 1135 memset(buffer, 0xab, sizeof(buffer)); 1136 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1137 dp->ConsumerReadData( 1138 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1139 int32_t expected_buffer[100]; 1140 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1141 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1142 1143 // Try discarding too much. 1144 num_bytes = 11u * sizeof(int32_t); 1145 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1146 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 1147 1148 // Just a little. 1149 num_bytes = 2u * sizeof(int32_t); 1150 Seq(300, arraysize(buffer), buffer); 1151 EXPECT_EQ( 1152 MOJO_RESULT_OK, 1153 dp->ProducerWriteData( 1154 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1155 EXPECT_EQ(2u * sizeof(int32_t), num_bytes); 1156 1157 // Just right. 1158 num_bytes = 3u * sizeof(int32_t); 1159 Seq(400, arraysize(buffer), buffer); 1160 EXPECT_EQ( 1161 MOJO_RESULT_OK, 1162 dp->ProducerWriteData( 1163 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1164 EXPECT_EQ(3u * sizeof(int32_t), num_bytes); 1165 1166 // Exactly full. 1167 num_bytes = 0u; 1168 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1169 EXPECT_EQ(10u * sizeof(int32_t), num_bytes); 1170 1171 // Read half. 1172 num_bytes = 5u * sizeof(int32_t); 1173 memset(buffer, 0xab, sizeof(buffer)); 1174 EXPECT_EQ(MOJO_RESULT_OK, 1175 dp->ConsumerReadData( 1176 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1177 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 1178 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1179 Seq(100, 5, expected_buffer); 1180 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1181 1182 // Try reading too much again. 1183 num_bytes = 6u * sizeof(int32_t); 1184 memset(buffer, 0xab, sizeof(buffer)); 1185 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1186 dp->ConsumerReadData( 1187 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1188 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1189 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1190 1191 // Try discarding too much again. 1192 num_bytes = 6u * sizeof(int32_t); 1193 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1194 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 1195 1196 // Discard a little. 1197 num_bytes = 2u * sizeof(int32_t); 1198 EXPECT_EQ(MOJO_RESULT_OK, 1199 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 1200 EXPECT_EQ(2u * sizeof(int32_t), num_bytes); 1201 1202 // Three left. 1203 num_bytes = 0u; 1204 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1205 EXPECT_EQ(3u * sizeof(int32_t), num_bytes); 1206 1207 // Close the producer, then test producer-closed cases. 1208 dp->ProducerClose(); 1209 1210 // Try reading too much; "failed precondition" since the producer is closed. 1211 num_bytes = 4u * sizeof(int32_t); 1212 memset(buffer, 0xab, sizeof(buffer)); 1213 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1214 dp->ConsumerReadData( 1215 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1216 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1217 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1218 1219 // Try discarding too much; "failed precondition" again. 1220 num_bytes = 4u * sizeof(int32_t); 1221 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1222 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 1223 1224 // Read a little. 1225 num_bytes = 2u * sizeof(int32_t); 1226 memset(buffer, 0xab, sizeof(buffer)); 1227 EXPECT_EQ(MOJO_RESULT_OK, 1228 dp->ConsumerReadData( 1229 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1230 EXPECT_EQ(2u * sizeof(int32_t), num_bytes); 1231 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1232 Seq(400, 2, expected_buffer); 1233 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1234 1235 // Discard the remaining element. 1236 num_bytes = 1u * sizeof(int32_t); 1237 EXPECT_EQ(MOJO_RESULT_OK, 1238 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 1239 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 1240 1241 // Empty again. 1242 num_bytes = ~0u; 1243 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1244 EXPECT_EQ(0u, num_bytes); 1245 1246 dp->ConsumerClose(); 1247 } 1248 1249 TEST(LocalDataPipeTest, AllOrNoneMayDiscard) { 1250 const MojoCreateDataPipeOptions options = { 1251 kSizeOfOptions, // |struct_size|. 1252 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_MAY_DISCARD, // |flags|. 1253 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 1254 10 * sizeof(int32_t) // |capacity_num_bytes|. 1255 }; 1256 MojoCreateDataPipeOptions validated_options = {0}; 1257 EXPECT_EQ(MOJO_RESULT_OK, 1258 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 1259 &validated_options)); 1260 1261 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1262 1263 // Try writing way too much. 1264 uint32_t num_bytes = 20u * sizeof(int32_t); 1265 int32_t buffer[100]; 1266 Seq(0, arraysize(buffer), buffer); 1267 EXPECT_EQ( 1268 MOJO_RESULT_OUT_OF_RANGE, 1269 dp->ProducerWriteData( 1270 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1271 1272 // Write some stuff. 1273 num_bytes = 5u * sizeof(int32_t); 1274 Seq(100, arraysize(buffer), buffer); 1275 EXPECT_EQ( 1276 MOJO_RESULT_OK, 1277 dp->ProducerWriteData( 1278 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1279 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 1280 1281 // Write lots of stuff (discarding all but "104"). 1282 num_bytes = 9u * sizeof(int32_t); 1283 Seq(200, arraysize(buffer), buffer); 1284 EXPECT_EQ( 1285 MOJO_RESULT_OK, 1286 dp->ProducerWriteData( 1287 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1288 EXPECT_EQ(9u * sizeof(int32_t), num_bytes); 1289 1290 // Read one. 1291 num_bytes = 1u * sizeof(int32_t); 1292 memset(buffer, 0xab, sizeof(buffer)); 1293 EXPECT_EQ(MOJO_RESULT_OK, 1294 dp->ConsumerReadData( 1295 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1296 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 1297 int32_t expected_buffer[100]; 1298 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1299 expected_buffer[0] = 104; 1300 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1301 1302 // Try reading too many. 1303 num_bytes = 10u * sizeof(int32_t); 1304 memset(buffer, 0xab, sizeof(buffer)); 1305 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1306 dp->ConsumerReadData( 1307 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1308 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1309 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1310 1311 // Try discarding too many. 1312 num_bytes = 10u * sizeof(int32_t); 1313 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1314 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 1315 1316 // Discard a bunch. 1317 num_bytes = 4u * sizeof(int32_t); 1318 EXPECT_EQ(MOJO_RESULT_OK, 1319 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), true)); 1320 1321 // Half full. 1322 num_bytes = 0u; 1323 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1324 EXPECT_EQ(5u * sizeof(int32_t), num_bytes); 1325 1326 // Write as much as possible. 1327 num_bytes = 10u * sizeof(int32_t); 1328 Seq(300, arraysize(buffer), buffer); 1329 EXPECT_EQ( 1330 MOJO_RESULT_OK, 1331 dp->ProducerWriteData( 1332 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1333 EXPECT_EQ(10u * sizeof(int32_t), num_bytes); 1334 1335 // Read everything. 1336 num_bytes = 10u * sizeof(int32_t); 1337 memset(buffer, 0xab, sizeof(buffer)); 1338 EXPECT_EQ(MOJO_RESULT_OK, 1339 dp->ConsumerReadData( 1340 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), true)); 1341 memset(expected_buffer, 0xab, sizeof(expected_buffer)); 1342 EXPECT_EQ(10u * sizeof(int32_t), num_bytes); 1343 Seq(300, 10, expected_buffer); 1344 EXPECT_EQ(0, memcmp(buffer, expected_buffer, sizeof(buffer))); 1345 1346 // Note: All-or-none two-phase writes on a "may discard" data pipe are tested 1347 // in LocalDataPipeTest.MayDiscard. 1348 1349 dp->ProducerClose(); 1350 dp->ConsumerClose(); 1351 } 1352 1353 TEST(LocalDataPipeTest, TwoPhaseAllOrNone) { 1354 const MojoCreateDataPipeOptions options = { 1355 kSizeOfOptions, // |struct_size|. 1356 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 1357 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 1358 10 * sizeof(int32_t) // |capacity_num_bytes|. 1359 }; 1360 MojoCreateDataPipeOptions validated_options = {0}; 1361 EXPECT_EQ(MOJO_RESULT_OK, 1362 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 1363 &validated_options)); 1364 1365 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1366 1367 // Try writing way too much (two-phase). 1368 uint32_t num_bytes = 20u * sizeof(int32_t); 1369 void* write_ptr = nullptr; 1370 EXPECT_EQ( 1371 MOJO_RESULT_OUT_OF_RANGE, 1372 dp->ProducerBeginWriteData( 1373 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), true)); 1374 1375 // Try writing an amount which isn't a multiple of the element size 1376 // (two-phase). 1377 static_assert(sizeof(int32_t) > 1u, "Wow! int32_t's have size 1"); 1378 num_bytes = 1u; 1379 write_ptr = nullptr; 1380 EXPECT_EQ( 1381 MOJO_RESULT_INVALID_ARGUMENT, 1382 dp->ProducerBeginWriteData( 1383 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), true)); 1384 1385 // Try reading way too much (two-phase). 1386 num_bytes = 20u * sizeof(int32_t); 1387 const void* read_ptr = nullptr; 1388 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1389 dp->ConsumerBeginReadData( 1390 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), true)); 1391 1392 // Write half (two-phase). 1393 num_bytes = 5u * sizeof(int32_t); 1394 write_ptr = nullptr; 1395 EXPECT_EQ( 1396 MOJO_RESULT_OK, 1397 dp->ProducerBeginWriteData( 1398 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), true)); 1399 // May provide more space than requested. 1400 EXPECT_GE(num_bytes, 5u * sizeof(int32_t)); 1401 EXPECT_TRUE(write_ptr); 1402 Seq(0, 5, static_cast<int32_t*>(write_ptr)); 1403 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(5u * sizeof(int32_t))); 1404 1405 // Try reading an amount which isn't a multiple of the element size 1406 // (two-phase). 1407 num_bytes = 1u; 1408 read_ptr = nullptr; 1409 EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, 1410 dp->ConsumerBeginReadData( 1411 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), true)); 1412 1413 // Read one (two-phase). 1414 num_bytes = 1u * sizeof(int32_t); 1415 read_ptr = nullptr; 1416 EXPECT_EQ(MOJO_RESULT_OK, 1417 dp->ConsumerBeginReadData( 1418 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), true)); 1419 EXPECT_GE(num_bytes, 1u * sizeof(int32_t)); 1420 EXPECT_EQ(0, static_cast<const int32_t*>(read_ptr)[0]); 1421 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerEndReadData(1u * sizeof(int32_t))); 1422 1423 // We should have four left, leaving room for six. 1424 num_bytes = 0u; 1425 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1426 EXPECT_EQ(4u * sizeof(int32_t), num_bytes); 1427 1428 // Assuming a tight circular buffer of the specified capacity, we can't do a 1429 // two-phase write of six now. 1430 num_bytes = 6u * sizeof(int32_t); 1431 write_ptr = nullptr; 1432 EXPECT_EQ( 1433 MOJO_RESULT_OUT_OF_RANGE, 1434 dp->ProducerBeginWriteData( 1435 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), true)); 1436 1437 // Write six elements (simple), filling the buffer. 1438 num_bytes = 6u * sizeof(int32_t); 1439 int32_t buffer[100]; 1440 Seq(100, 6, buffer); 1441 EXPECT_EQ( 1442 MOJO_RESULT_OK, 1443 dp->ProducerWriteData( 1444 UserPointer<const void>(buffer), MakeUserPointer(&num_bytes), true)); 1445 EXPECT_EQ(6u * sizeof(int32_t), num_bytes); 1446 1447 // We have ten. 1448 num_bytes = 0u; 1449 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1450 EXPECT_EQ(10u * sizeof(int32_t), num_bytes); 1451 1452 // But a two-phase read of ten should fail. 1453 num_bytes = 10u * sizeof(int32_t); 1454 read_ptr = nullptr; 1455 EXPECT_EQ(MOJO_RESULT_OUT_OF_RANGE, 1456 dp->ConsumerBeginReadData( 1457 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), true)); 1458 1459 // Close the producer. 1460 dp->ProducerClose(); 1461 1462 // A two-phase read of nine should work. 1463 num_bytes = 9u * sizeof(int32_t); 1464 read_ptr = nullptr; 1465 EXPECT_EQ(MOJO_RESULT_OK, 1466 dp->ConsumerBeginReadData( 1467 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), true)); 1468 EXPECT_GE(num_bytes, 9u * sizeof(int32_t)); 1469 EXPECT_EQ(1, static_cast<const int32_t*>(read_ptr)[0]); 1470 EXPECT_EQ(2, static_cast<const int32_t*>(read_ptr)[1]); 1471 EXPECT_EQ(3, static_cast<const int32_t*>(read_ptr)[2]); 1472 EXPECT_EQ(4, static_cast<const int32_t*>(read_ptr)[3]); 1473 EXPECT_EQ(100, static_cast<const int32_t*>(read_ptr)[4]); 1474 EXPECT_EQ(101, static_cast<const int32_t*>(read_ptr)[5]); 1475 EXPECT_EQ(102, static_cast<const int32_t*>(read_ptr)[6]); 1476 EXPECT_EQ(103, static_cast<const int32_t*>(read_ptr)[7]); 1477 EXPECT_EQ(104, static_cast<const int32_t*>(read_ptr)[8]); 1478 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerEndReadData(9u * sizeof(int32_t))); 1479 1480 // A two-phase read of two should fail, with "failed precondition". 1481 num_bytes = 2u * sizeof(int32_t); 1482 read_ptr = nullptr; 1483 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1484 dp->ConsumerBeginReadData( 1485 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), true)); 1486 1487 dp->ConsumerClose(); 1488 } 1489 1490 // Tests that |ProducerWriteData()| and |ConsumerReadData()| writes and reads, 1491 // respectively, as much as possible, even if it has to "wrap around" the 1492 // internal circular buffer. (Note that the two-phase write and read do not do 1493 // this.) 1494 TEST(LocalDataPipeTest, WrapAround) { 1495 unsigned char test_data[1000]; 1496 for (size_t i = 0; i < arraysize(test_data); i++) 1497 test_data[i] = static_cast<unsigned char>(i); 1498 1499 const MojoCreateDataPipeOptions options = { 1500 kSizeOfOptions, // |struct_size|. 1501 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 1502 1u, // |element_num_bytes|. 1503 100u // |capacity_num_bytes|. 1504 }; 1505 MojoCreateDataPipeOptions validated_options = {0}; 1506 EXPECT_EQ(MOJO_RESULT_OK, 1507 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 1508 &validated_options)); 1509 // This test won't be valid if |ValidateCreateOptions()| decides to give the 1510 // pipe more space. 1511 ASSERT_EQ(100u, validated_options.capacity_num_bytes); 1512 1513 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1514 1515 // Write 20 bytes. 1516 uint32_t num_bytes = 20u; 1517 EXPECT_EQ(MOJO_RESULT_OK, 1518 dp->ProducerWriteData(UserPointer<const void>(&test_data[0]), 1519 MakeUserPointer(&num_bytes), 1520 false)); 1521 EXPECT_EQ(20u, num_bytes); 1522 1523 // Read 10 bytes. 1524 unsigned char read_buffer[1000] = {0}; 1525 num_bytes = 10u; 1526 EXPECT_EQ( 1527 MOJO_RESULT_OK, 1528 dp->ConsumerReadData( 1529 UserPointer<void>(read_buffer), MakeUserPointer(&num_bytes), false)); 1530 EXPECT_EQ(10u, num_bytes); 1531 EXPECT_EQ(0, memcmp(read_buffer, &test_data[0], 10u)); 1532 1533 // Check that a two-phase write can now only write (at most) 80 bytes. (This 1534 // checks an implementation detail; this behavior is not guaranteed, but we 1535 // need it for this test.) 1536 void* write_buffer_ptr = nullptr; 1537 num_bytes = 0u; 1538 EXPECT_EQ(MOJO_RESULT_OK, 1539 dp->ProducerBeginWriteData(MakeUserPointer(&write_buffer_ptr), 1540 MakeUserPointer(&num_bytes), 1541 false)); 1542 EXPECT_TRUE(write_buffer_ptr); 1543 EXPECT_EQ(80u, num_bytes); 1544 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(0u)); 1545 1546 // Write as much data as we can (using |ProducerWriteData()|). We should write 1547 // 90 bytes. 1548 num_bytes = 200u; 1549 EXPECT_EQ(MOJO_RESULT_OK, 1550 dp->ProducerWriteData(UserPointer<const void>(&test_data[20]), 1551 MakeUserPointer(&num_bytes), 1552 false)); 1553 EXPECT_EQ(90u, num_bytes); 1554 1555 // Check that a two-phase read can now only read (at most) 90 bytes. (This 1556 // checks an implementation detail; this behavior is not guaranteed, but we 1557 // need it for this test.) 1558 const void* read_buffer_ptr = nullptr; 1559 num_bytes = 0u; 1560 EXPECT_EQ(MOJO_RESULT_OK, 1561 dp->ConsumerBeginReadData(MakeUserPointer(&read_buffer_ptr), 1562 MakeUserPointer(&num_bytes), 1563 false)); 1564 EXPECT_TRUE(read_buffer_ptr); 1565 EXPECT_EQ(90u, num_bytes); 1566 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerEndReadData(0u)); 1567 1568 // Read as much as possible (using |ConsumerReadData()|). We should read 100 1569 // bytes. 1570 num_bytes = 1571 static_cast<uint32_t>(arraysize(read_buffer) * sizeof(read_buffer[0])); 1572 memset(read_buffer, 0, num_bytes); 1573 EXPECT_EQ( 1574 MOJO_RESULT_OK, 1575 dp->ConsumerReadData( 1576 UserPointer<void>(read_buffer), MakeUserPointer(&num_bytes), false)); 1577 EXPECT_EQ(100u, num_bytes); 1578 EXPECT_EQ(0, memcmp(read_buffer, &test_data[10], 100u)); 1579 1580 dp->ProducerClose(); 1581 dp->ConsumerClose(); 1582 } 1583 1584 // Tests the behavior of closing the producer or consumer with respect to 1585 // writes and reads (simple and two-phase). 1586 TEST(LocalDataPipeTest, CloseWriteRead) { 1587 const char kTestData[] = "hello world"; 1588 const uint32_t kTestDataSize = static_cast<uint32_t>(sizeof(kTestData)); 1589 1590 const MojoCreateDataPipeOptions options = { 1591 kSizeOfOptions, // |struct_size|. 1592 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 1593 1u, // |element_num_bytes|. 1594 1000u // |capacity_num_bytes|. 1595 }; 1596 MojoCreateDataPipeOptions validated_options = {0}; 1597 EXPECT_EQ(MOJO_RESULT_OK, 1598 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 1599 &validated_options)); 1600 1601 // Close producer first, then consumer. 1602 { 1603 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1604 1605 // Write some data, so we'll have something to read. 1606 uint32_t num_bytes = kTestDataSize; 1607 EXPECT_EQ(MOJO_RESULT_OK, 1608 dp->ProducerWriteData(UserPointer<const void>(kTestData), 1609 MakeUserPointer(&num_bytes), 1610 false)); 1611 EXPECT_EQ(kTestDataSize, num_bytes); 1612 1613 // Write it again, so we'll have something left over. 1614 num_bytes = kTestDataSize; 1615 EXPECT_EQ(MOJO_RESULT_OK, 1616 dp->ProducerWriteData(UserPointer<const void>(kTestData), 1617 MakeUserPointer(&num_bytes), 1618 false)); 1619 EXPECT_EQ(kTestDataSize, num_bytes); 1620 1621 // Start two-phase write. 1622 void* write_buffer_ptr = nullptr; 1623 num_bytes = 0u; 1624 EXPECT_EQ(MOJO_RESULT_OK, 1625 dp->ProducerBeginWriteData(MakeUserPointer(&write_buffer_ptr), 1626 MakeUserPointer(&num_bytes), 1627 false)); 1628 EXPECT_TRUE(write_buffer_ptr); 1629 EXPECT_GT(num_bytes, 0u); 1630 1631 // Start two-phase read. 1632 const void* read_buffer_ptr = nullptr; 1633 num_bytes = 0u; 1634 EXPECT_EQ(MOJO_RESULT_OK, 1635 dp->ConsumerBeginReadData(MakeUserPointer(&read_buffer_ptr), 1636 MakeUserPointer(&num_bytes), 1637 false)); 1638 EXPECT_TRUE(read_buffer_ptr); 1639 EXPECT_EQ(2u * kTestDataSize, num_bytes); 1640 1641 // Close the producer. 1642 dp->ProducerClose(); 1643 1644 // The consumer can finish its two-phase read. 1645 EXPECT_EQ(0, memcmp(read_buffer_ptr, kTestData, kTestDataSize)); 1646 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerEndReadData(kTestDataSize)); 1647 1648 // And start another. 1649 read_buffer_ptr = nullptr; 1650 num_bytes = 0u; 1651 EXPECT_EQ(MOJO_RESULT_OK, 1652 dp->ConsumerBeginReadData(MakeUserPointer(&read_buffer_ptr), 1653 MakeUserPointer(&num_bytes), 1654 false)); 1655 EXPECT_TRUE(read_buffer_ptr); 1656 EXPECT_EQ(kTestDataSize, num_bytes); 1657 1658 // Close the consumer, which cancels the two-phase read. 1659 dp->ConsumerClose(); 1660 } 1661 1662 // Close consumer first, then producer. 1663 { 1664 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1665 1666 // Write some data, so we'll have something to read. 1667 uint32_t num_bytes = kTestDataSize; 1668 EXPECT_EQ(MOJO_RESULT_OK, 1669 dp->ProducerWriteData(UserPointer<const void>(kTestData), 1670 MakeUserPointer(&num_bytes), 1671 false)); 1672 EXPECT_EQ(kTestDataSize, num_bytes); 1673 1674 // Start two-phase write. 1675 void* write_buffer_ptr = nullptr; 1676 num_bytes = 0u; 1677 EXPECT_EQ(MOJO_RESULT_OK, 1678 dp->ProducerBeginWriteData(MakeUserPointer(&write_buffer_ptr), 1679 MakeUserPointer(&num_bytes), 1680 false)); 1681 EXPECT_TRUE(write_buffer_ptr); 1682 ASSERT_GT(num_bytes, kTestDataSize); 1683 1684 // Start two-phase read. 1685 const void* read_buffer_ptr = nullptr; 1686 num_bytes = 0u; 1687 EXPECT_EQ(MOJO_RESULT_OK, 1688 dp->ConsumerBeginReadData(MakeUserPointer(&read_buffer_ptr), 1689 MakeUserPointer(&num_bytes), 1690 false)); 1691 EXPECT_TRUE(read_buffer_ptr); 1692 EXPECT_EQ(kTestDataSize, num_bytes); 1693 1694 // Close the consumer. 1695 dp->ConsumerClose(); 1696 1697 // Actually write some data. (Note: Premature freeing of the buffer would 1698 // probably only be detected under ASAN or similar.) 1699 memcpy(write_buffer_ptr, kTestData, kTestDataSize); 1700 // Note: Even though the consumer has been closed, ending the two-phase 1701 // write will report success. 1702 EXPECT_EQ(MOJO_RESULT_OK, dp->ProducerEndWriteData(kTestDataSize)); 1703 1704 // But trying to write should result in failure. 1705 num_bytes = kTestDataSize; 1706 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1707 dp->ProducerWriteData(UserPointer<const void>(kTestData), 1708 MakeUserPointer(&num_bytes), 1709 false)); 1710 1711 // As will trying to start another two-phase write. 1712 write_buffer_ptr = nullptr; 1713 num_bytes = 0u; 1714 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1715 dp->ProducerBeginWriteData(MakeUserPointer(&write_buffer_ptr), 1716 MakeUserPointer(&num_bytes), 1717 false)); 1718 1719 dp->ProducerClose(); 1720 } 1721 1722 // Test closing the consumer first, then the producer, with an active 1723 // two-phase write. 1724 { 1725 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1726 1727 // Start two-phase write. 1728 void* write_buffer_ptr = nullptr; 1729 uint32_t num_bytes = 0u; 1730 EXPECT_EQ(MOJO_RESULT_OK, 1731 dp->ProducerBeginWriteData(MakeUserPointer(&write_buffer_ptr), 1732 MakeUserPointer(&num_bytes), 1733 false)); 1734 EXPECT_TRUE(write_buffer_ptr); 1735 ASSERT_GT(num_bytes, kTestDataSize); 1736 1737 dp->ConsumerClose(); 1738 dp->ProducerClose(); 1739 } 1740 1741 // Test closing the producer and then trying to read (with no data). 1742 { 1743 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1744 1745 // Write some data, so we'll have something to read. 1746 uint32_t num_bytes = kTestDataSize; 1747 EXPECT_EQ(MOJO_RESULT_OK, 1748 dp->ProducerWriteData(UserPointer<const void>(kTestData), 1749 MakeUserPointer(&num_bytes), 1750 false)); 1751 EXPECT_EQ(kTestDataSize, num_bytes); 1752 1753 // Close the producer. 1754 dp->ProducerClose(); 1755 1756 // Read that data. 1757 char buffer[1000]; 1758 num_bytes = static_cast<uint32_t>(sizeof(buffer)); 1759 EXPECT_EQ( 1760 MOJO_RESULT_OK, 1761 dp->ConsumerReadData( 1762 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), false)); 1763 EXPECT_EQ(kTestDataSize, num_bytes); 1764 EXPECT_EQ(0, memcmp(buffer, kTestData, kTestDataSize)); 1765 1766 // A second read should fail. 1767 num_bytes = static_cast<uint32_t>(sizeof(buffer)); 1768 EXPECT_EQ( 1769 MOJO_RESULT_FAILED_PRECONDITION, 1770 dp->ConsumerReadData( 1771 UserPointer<void>(buffer), MakeUserPointer(&num_bytes), false)); 1772 1773 // A two-phase read should also fail. 1774 const void* read_buffer_ptr = nullptr; 1775 num_bytes = 0u; 1776 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1777 dp->ConsumerBeginReadData(MakeUserPointer(&read_buffer_ptr), 1778 MakeUserPointer(&num_bytes), 1779 false)); 1780 1781 // Ditto for discard. 1782 num_bytes = 10u; 1783 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1784 dp->ConsumerDiscardData(MakeUserPointer(&num_bytes), false)); 1785 1786 dp->ConsumerClose(); 1787 } 1788 } 1789 1790 TEST(LocalDataPipeTest, TwoPhaseMoreInvalidArguments) { 1791 const MojoCreateDataPipeOptions options = { 1792 kSizeOfOptions, // |struct_size|. 1793 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE, // |flags|. 1794 static_cast<uint32_t>(sizeof(int32_t)), // |element_num_bytes|. 1795 10 * sizeof(int32_t) // |capacity_num_bytes|. 1796 }; 1797 MojoCreateDataPipeOptions validated_options = {0}; 1798 EXPECT_EQ(MOJO_RESULT_OK, 1799 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 1800 &validated_options)); 1801 1802 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1803 1804 // No data. 1805 uint32_t num_bytes = 1000u; 1806 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1807 EXPECT_EQ(0u, num_bytes); 1808 1809 // Try "ending" a two-phase write when one isn't active. 1810 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1811 dp->ProducerEndWriteData(1u * sizeof(int32_t))); 1812 1813 // Still no data. 1814 num_bytes = 1000u; 1815 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1816 EXPECT_EQ(0u, num_bytes); 1817 1818 // Try ending a two-phase write with an invalid amount (too much). 1819 num_bytes = 0u; 1820 void* write_ptr = nullptr; 1821 EXPECT_EQ( 1822 MOJO_RESULT_OK, 1823 dp->ProducerBeginWriteData( 1824 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), false)); 1825 EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, 1826 dp->ProducerEndWriteData(num_bytes + 1827 static_cast<uint32_t>(sizeof(int32_t)))); 1828 1829 // But the two-phase write still ended. 1830 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, dp->ProducerEndWriteData(0u)); 1831 1832 // Still no data. 1833 num_bytes = 1000u; 1834 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1835 EXPECT_EQ(0u, num_bytes); 1836 1837 // Try ending a two-phase write with an invalid amount (not a multiple of the 1838 // element size). 1839 num_bytes = 0u; 1840 write_ptr = nullptr; 1841 EXPECT_EQ( 1842 MOJO_RESULT_OK, 1843 dp->ProducerBeginWriteData( 1844 MakeUserPointer(&write_ptr), MakeUserPointer(&num_bytes), false)); 1845 EXPECT_GE(num_bytes, 1u); 1846 EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, dp->ProducerEndWriteData(1u)); 1847 1848 // But the two-phase write still ended. 1849 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, dp->ProducerEndWriteData(0u)); 1850 1851 // Still no data. 1852 num_bytes = 1000u; 1853 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1854 EXPECT_EQ(0u, num_bytes); 1855 1856 // Now write some data, so we'll be able to try reading. 1857 int32_t element = 123; 1858 num_bytes = 1u * sizeof(int32_t); 1859 EXPECT_EQ(MOJO_RESULT_OK, 1860 dp->ProducerWriteData(UserPointer<const void>(&element), 1861 MakeUserPointer(&num_bytes), 1862 false)); 1863 1864 // One element available. 1865 num_bytes = 0u; 1866 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1867 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 1868 1869 // Try "ending" a two-phase read when one isn't active. 1870 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, 1871 dp->ConsumerEndReadData(1u * sizeof(int32_t))); 1872 1873 // Still one element available. 1874 num_bytes = 0u; 1875 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1876 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 1877 1878 // Try ending a two-phase read with an invalid amount (too much). 1879 num_bytes = 0u; 1880 const void* read_ptr = nullptr; 1881 EXPECT_EQ( 1882 MOJO_RESULT_OK, 1883 dp->ConsumerBeginReadData( 1884 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), false)); 1885 EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, 1886 dp->ConsumerEndReadData(num_bytes + 1887 static_cast<uint32_t>(sizeof(int32_t)))); 1888 1889 // Still one element available. 1890 num_bytes = 0u; 1891 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1892 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 1893 1894 // Try ending a two-phase read with an invalid amount (not a multiple of the 1895 // element size). 1896 num_bytes = 0u; 1897 read_ptr = nullptr; 1898 EXPECT_EQ( 1899 MOJO_RESULT_OK, 1900 dp->ConsumerBeginReadData( 1901 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), false)); 1902 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 1903 EXPECT_EQ(123, static_cast<const int32_t*>(read_ptr)[0]); 1904 EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, dp->ConsumerEndReadData(1u)); 1905 1906 // Still one element available. 1907 num_bytes = 0u; 1908 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerQueryData(MakeUserPointer(&num_bytes))); 1909 EXPECT_EQ(1u * sizeof(int32_t), num_bytes); 1910 1911 dp->ProducerClose(); 1912 dp->ConsumerClose(); 1913 } 1914 1915 // Tests that even with "may discard", the data won't change under a two-phase 1916 // read. 1917 // TODO(vtl): crbug.com/348644: We currently don't pass this. (There are two 1918 // related issues: First, we don't recognize that the data given to 1919 // |ConsumerBeginReadData()| isn't discardable until |ConsumerEndReadData()|, 1920 // and thus we erroneously allow |ProducerWriteData()| to succeed. Second, the 1921 // |ProducerWriteData()| then changes the data underneath the two-phase read.) 1922 TEST(LocalDataPipeTest, DISABLED_MayDiscardTwoPhaseConsistent) { 1923 const MojoCreateDataPipeOptions options = { 1924 kSizeOfOptions, // |struct_size|. 1925 MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_MAY_DISCARD, // |flags|. 1926 1, // |element_num_bytes|. 1927 2 // |capacity_num_bytes|. 1928 }; 1929 MojoCreateDataPipeOptions validated_options = {0}; 1930 EXPECT_EQ(MOJO_RESULT_OK, 1931 DataPipe::ValidateCreateOptions(MakeUserPointer(&options), 1932 &validated_options)); 1933 1934 scoped_refptr<LocalDataPipe> dp(new LocalDataPipe(validated_options)); 1935 1936 // Write some elements. 1937 char elements[2] = {'a', 'b'}; 1938 uint32_t num_bytes = 2u; 1939 EXPECT_EQ(MOJO_RESULT_OK, 1940 dp->ProducerWriteData(UserPointer<const void>(elements), 1941 MakeUserPointer(&num_bytes), 1942 false)); 1943 EXPECT_EQ(2u, num_bytes); 1944 1945 // Begin reading. 1946 const void* read_ptr = nullptr; 1947 num_bytes = 2u; 1948 EXPECT_EQ( 1949 MOJO_RESULT_OK, 1950 dp->ConsumerBeginReadData( 1951 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), false)); 1952 EXPECT_EQ(2u, num_bytes); 1953 EXPECT_EQ('a', static_cast<const char*>(read_ptr)[0]); 1954 EXPECT_EQ('b', static_cast<const char*>(read_ptr)[1]); 1955 1956 // Try to write some more. But nothing should be discardable right now. 1957 elements[0] = 'x'; 1958 elements[1] = 'y'; 1959 num_bytes = 2u; 1960 // TODO(vtl): This should be: 1961 // EXPECT_EQ(MOJO_RESULT_SHOULD_WAIT, 1962 // dp->ProducerWriteData(elements, &num_bytes, false)); 1963 // but we incorrectly think that the bytes being read are discardable. Letting 1964 // this through reveals the significant consequence. 1965 EXPECT_EQ(MOJO_RESULT_OK, 1966 dp->ProducerWriteData(UserPointer<const void>(elements), 1967 MakeUserPointer(&num_bytes), 1968 false)); 1969 1970 // Check that our read buffer hasn't changed underneath us. 1971 EXPECT_EQ('a', static_cast<const char*>(read_ptr)[0]); 1972 EXPECT_EQ('b', static_cast<const char*>(read_ptr)[1]); 1973 1974 // End reading. 1975 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerEndReadData(2u)); 1976 1977 // Now writing should succeed. 1978 EXPECT_EQ(MOJO_RESULT_OK, 1979 dp->ProducerWriteData(UserPointer<const void>(elements), 1980 MakeUserPointer(&num_bytes), 1981 false)); 1982 1983 // And if we read, we should get the new values. 1984 read_ptr = nullptr; 1985 num_bytes = 2u; 1986 EXPECT_EQ( 1987 MOJO_RESULT_OK, 1988 dp->ConsumerBeginReadData( 1989 MakeUserPointer(&read_ptr), MakeUserPointer(&num_bytes), false)); 1990 EXPECT_EQ(2u, num_bytes); 1991 EXPECT_EQ('x', static_cast<const char*>(read_ptr)[0]); 1992 EXPECT_EQ('y', static_cast<const char*>(read_ptr)[1]); 1993 1994 // End reading. 1995 EXPECT_EQ(MOJO_RESULT_OK, dp->ConsumerEndReadData(2u)); 1996 1997 dp->ProducerClose(); 1998 dp->ConsumerClose(); 1999 } 2000 2001 } // namespace 2002 } // namespace system 2003 } // namespace mojo 2004
