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| 1 // Copyright (c) 2010 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 "net/disk_cache/in_flight_backend_io.h" | |
| 6 | |
| 7 #include "base/compiler_specific.h" | |
| 8 #include "base/logging.h" | |
| 9 #include "net/base/net_errors.h" | |
| 10 #include "net/disk_cache/backend_impl.h" | |
| 11 #include "net/disk_cache/entry_impl.h" | |
| 12 | |
| 13 namespace disk_cache { | |
| 14 | |
| 15 BackendIO::BackendIO(InFlightIO* controller, BackendImpl* backend, | |
| 16 net::CompletionCallback* callback) | |
| 17 : BackgroundIO(controller), backend_(backend), callback_(callback), | |
| 18 operation_(OP_NONE), | |
| 19 ALLOW_THIS_IN_INITIALIZER_LIST( | |
| 20 my_callback_(this, &BackendIO::OnIOComplete)) { | |
| 21 } | |
| 22 | |
| 23 // Runs on the background thread. | |
| 24 void BackendIO::ExecuteOperation() { | |
| 25 if (IsEntryOperation()) | |
| 26 return ExecuteEntryOperation(); | |
| 27 | |
| 28 ExecuteBackendOperation(); | |
| 29 } | |
| 30 | |
| 31 // Runs on the background thread. | |
| 32 void BackendIO::OnIOComplete(int result) { | |
| 33 DCHECK(IsEntryOperation()); | |
| 34 DCHECK_NE(result, net::ERR_IO_PENDING); | |
| 35 result_ = result; | |
| 36 controller_->OnIOComplete(this); | |
| 37 } | |
| 38 | |
| 39 bool BackendIO::IsEntryOperation() { | |
| 40 return operation_ > OP_MAX_BACKEND; | |
| 41 } | |
| 42 | |
| 43 void BackendIO::ReleaseEntry() { | |
| 44 entry_ = NULL; | |
| 45 } | |
| 46 | |
| 47 void BackendIO::Init() { | |
| 48 operation_ = OP_INIT; | |
| 49 } | |
| 50 | |
| 51 void BackendIO::OpenEntry(const std::string& key, Entry** entry) { | |
| 52 operation_ = OP_OPEN; | |
| 53 key_ = key; | |
| 54 entry_ptr_ = entry; | |
| 55 } | |
| 56 | |
| 57 void BackendIO::CreateEntry(const std::string& key, Entry** entry) { | |
| 58 operation_ = OP_CREATE; | |
| 59 key_ = key; | |
| 60 entry_ptr_ = entry; | |
| 61 } | |
| 62 | |
| 63 void BackendIO::DoomEntry(const std::string& key) { | |
| 64 operation_ = OP_DOOM; | |
| 65 key_ = key; | |
| 66 } | |
| 67 | |
| 68 void BackendIO::DoomAllEntries() { | |
| 69 operation_ = OP_DOOM_ALL; | |
| 70 } | |
| 71 | |
| 72 void BackendIO::DoomEntriesBetween(const base::Time initial_time, | |
| 73 const base::Time end_time) { | |
| 74 operation_ = OP_DOOM_BETWEEN; | |
| 75 initial_time_ = initial_time; | |
| 76 end_time_ = end_time; | |
| 77 } | |
| 78 | |
| 79 void BackendIO::DoomEntriesSince(const base::Time initial_time) { | |
| 80 operation_ = OP_DOOM_SINCE; | |
| 81 initial_time_ = initial_time; | |
| 82 } | |
| 83 | |
| 84 void BackendIO::OpenNextEntry(void** iter, Entry** next_entry) { | |
| 85 operation_ = OP_OPEN_NEXT; | |
| 86 iter_ptr_ = iter; | |
| 87 entry_ptr_ = next_entry; | |
| 88 } | |
| 89 | |
| 90 void BackendIO::OpenPrevEntry(void** iter, Entry** prev_entry) { | |
| 91 operation_ = OP_OPEN_PREV; | |
| 92 iter_ptr_ = iter; | |
| 93 entry_ptr_ = prev_entry; | |
| 94 } | |
| 95 | |
| 96 void BackendIO::EndEnumeration(void* iterator) { | |
| 97 operation_ = OP_END_ENUMERATION; | |
| 98 iter_ = iterator; | |
| 99 } | |
| 100 | |
| 101 void BackendIO::CloseEntryImpl(EntryImpl* entry) { | |
| 102 operation_ = OP_CLOSE_ENTRY; | |
| 103 entry_ = entry; | |
| 104 } | |
| 105 | |
| 106 void BackendIO::DoomEntryImpl(EntryImpl* entry) { | |
| 107 operation_ = OP_DOOM_ENTRY; | |
| 108 entry_ = entry; | |
| 109 } | |
| 110 | |
| 111 void BackendIO::FlushQueue() { | |
| 112 operation_ = OP_FLUSH_QUEUE; | |
| 113 } | |
| 114 | |
| 115 void BackendIO::ReadData(EntryImpl* entry, int index, int offset, | |
| 116 net::IOBuffer* buf, int buf_len) { | |
| 117 operation_ = OP_READ; | |
| 118 entry_ = entry; | |
| 119 index_ = index; | |
| 120 offset_ = offset; | |
| 121 buf_ = buf; | |
| 122 buf_len_ = buf_len; | |
| 123 } | |
| 124 | |
| 125 void BackendIO::WriteData(EntryImpl* entry, int index, int offset, | |
| 126 net::IOBuffer* buf, int buf_len, bool truncate) { | |
| 127 operation_ = OP_WRITE; | |
| 128 entry_ = entry; | |
| 129 index_ = index; | |
| 130 offset_ = offset; | |
| 131 buf_ = buf; | |
| 132 buf_len_ = buf_len; | |
| 133 truncate_ = truncate; | |
| 134 } | |
| 135 | |
| 136 void BackendIO::ReadSparseData(EntryImpl* entry, int64 offset, | |
| 137 net::IOBuffer* buf, int buf_len) { | |
| 138 operation_ = OP_READ_SPARSE; | |
| 139 entry_ = entry; | |
| 140 offset64_ = offset; | |
| 141 buf_ = buf; | |
| 142 buf_len_ = buf_len; | |
| 143 } | |
| 144 | |
| 145 void BackendIO::WriteSparseData(EntryImpl* entry, int64 offset, | |
| 146 net::IOBuffer* buf, int buf_len) { | |
| 147 operation_ = OP_WRITE_SPARSE; | |
| 148 entry_ = entry; | |
| 149 offset64_ = offset; | |
| 150 buf_ = buf; | |
| 151 buf_len_ = buf_len; | |
| 152 } | |
| 153 | |
| 154 void BackendIO::GetAvailableRange(EntryImpl* entry, int64 offset, int len, | |
| 155 int64* start) { | |
| 156 operation_ = OP_GET_RANGE; | |
| 157 entry_ = entry; | |
| 158 offset64_ = offset; | |
| 159 buf_len_ = len; | |
| 160 start_ = start; | |
| 161 } | |
| 162 | |
| 163 void BackendIO::CancelSparseIO(EntryImpl* entry) { | |
| 164 operation_ = OP_CANCEL_IO; | |
| 165 entry_ = entry; | |
| 166 } | |
| 167 | |
| 168 void BackendIO::ReadyForSparseIO(EntryImpl* entry) { | |
| 169 operation_ = OP_IS_READY; | |
| 170 entry_ = entry; | |
| 171 } | |
| 172 | |
| 173 // Runs on the background thread. | |
| 174 void BackendIO::ExecuteBackendOperation() { | |
| 175 switch (operation_) { | |
| 176 case OP_INIT: | |
| 177 result_ = backend_->SyncInit(); | |
| 178 break; | |
| 179 case OP_OPEN: | |
| 180 result_ = backend_->SyncOpenEntry(key_, entry_ptr_); | |
| 181 break; | |
| 182 case OP_CREATE: | |
| 183 result_ = backend_->SyncCreateEntry(key_, entry_ptr_); | |
| 184 break; | |
| 185 case OP_DOOM: | |
| 186 result_ = backend_->SyncDoomEntry(key_); | |
| 187 break; | |
| 188 case OP_DOOM_ALL: | |
| 189 result_ = backend_->SyncDoomAllEntries(); | |
| 190 break; | |
| 191 case OP_DOOM_BETWEEN: | |
| 192 result_ = backend_->SyncDoomEntriesBetween(initial_time_, end_time_); | |
| 193 break; | |
| 194 case OP_DOOM_SINCE: | |
| 195 result_ = backend_->SyncDoomEntriesSince(initial_time_); | |
| 196 break; | |
| 197 case OP_OPEN_NEXT: | |
| 198 result_ = backend_->SyncOpenNextEntry(iter_ptr_, entry_ptr_); | |
| 199 break; | |
| 200 case OP_OPEN_PREV: | |
| 201 result_ = backend_->SyncOpenPrevEntry(iter_ptr_, entry_ptr_); | |
| 202 break; | |
| 203 case OP_END_ENUMERATION: | |
| 204 backend_->SyncEndEnumeration(iter_); | |
| 205 result_ = net::OK; | |
| 206 break; | |
| 207 case OP_CLOSE_ENTRY: | |
| 208 entry_->Release(); | |
| 209 result_ = net::OK; | |
| 210 break; | |
| 211 case OP_DOOM_ENTRY: | |
| 212 entry_->DoomImpl(); | |
| 213 result_ = net::OK; | |
| 214 break; | |
| 215 case OP_FLUSH_QUEUE: | |
| 216 result_ = net::OK; | |
| 217 break; | |
| 218 default: | |
| 219 NOTREACHED() << "Invalid Operation"; | |
| 220 result_ = net::ERR_UNEXPECTED; | |
| 221 } | |
| 222 DCHECK_NE(net::ERR_IO_PENDING, result_); | |
| 223 controller_->OnIOComplete(this); | |
| 224 } | |
| 225 | |
| 226 // Runs on the background thread. | |
| 227 void BackendIO::ExecuteEntryOperation() { | |
| 228 switch (operation_) { | |
| 229 case OP_READ: | |
| 230 result_ = entry_->ReadDataImpl(index_, offset_, buf_, buf_len_, | |
| 231 &my_callback_); | |
| 232 break; | |
| 233 case OP_WRITE: | |
| 234 result_ = entry_->WriteDataImpl(index_, offset_, buf_, buf_len_, | |
| 235 &my_callback_, truncate_); | |
| 236 break; | |
| 237 case OP_READ_SPARSE: | |
| 238 result_ = entry_->ReadSparseDataImpl(offset64_, buf_, buf_len_, | |
| 239 &my_callback_); | |
| 240 break; | |
| 241 case OP_WRITE_SPARSE: | |
| 242 result_ = entry_->WriteSparseDataImpl(offset64_, buf_, buf_len_, | |
| 243 &my_callback_); | |
| 244 break; | |
| 245 case OP_GET_RANGE: | |
| 246 result_ = entry_->GetAvailableRangeImpl(offset64_, buf_len_, start_); | |
| 247 break; | |
| 248 case OP_CANCEL_IO: | |
| 249 entry_->CancelSparseIOImpl(); | |
| 250 result_ = net::OK; | |
| 251 break; | |
| 252 case OP_IS_READY: | |
| 253 result_ = entry_->ReadyForSparseIOImpl(&my_callback_); | |
| 254 break; | |
| 255 default: | |
| 256 NOTREACHED() << "Invalid Operation"; | |
| 257 result_ = net::ERR_UNEXPECTED; | |
| 258 } | |
| 259 if (result_ != net::ERR_IO_PENDING) | |
| 260 controller_->OnIOComplete(this); | |
| 261 } | |
| 262 | |
| 263 // --------------------------------------------------------------------------- | |
| 264 | |
| 265 void InFlightBackendIO::Init(CompletionCallback* callback) { | |
| 266 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 267 operation->Init(); | |
| 268 QueueOperation(operation); | |
| 269 } | |
| 270 | |
| 271 void InFlightBackendIO::OpenEntry(const std::string& key, Entry** entry, | |
| 272 CompletionCallback* callback) { | |
| 273 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 274 operation->OpenEntry(key, entry); | |
| 275 QueueOperation(operation); | |
| 276 } | |
| 277 | |
| 278 void InFlightBackendIO::CreateEntry(const std::string& key, Entry** entry, | |
| 279 CompletionCallback* callback) { | |
| 280 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 281 operation->CreateEntry(key, entry); | |
| 282 QueueOperation(operation); | |
| 283 } | |
| 284 | |
| 285 void InFlightBackendIO::DoomEntry(const std::string& key, | |
| 286 CompletionCallback* callback) { | |
| 287 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 288 operation->DoomEntry(key); | |
| 289 QueueOperation(operation); | |
| 290 } | |
| 291 | |
| 292 void InFlightBackendIO::DoomAllEntries(CompletionCallback* callback) { | |
| 293 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 294 operation->DoomAllEntries(); | |
| 295 QueueOperation(operation); | |
| 296 } | |
| 297 | |
| 298 void InFlightBackendIO::DoomEntriesBetween(const base::Time initial_time, | |
| 299 const base::Time end_time, | |
| 300 CompletionCallback* callback) { | |
| 301 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 302 operation->DoomEntriesBetween(initial_time, end_time); | |
| 303 QueueOperation(operation); | |
| 304 } | |
| 305 | |
| 306 void InFlightBackendIO::DoomEntriesSince(const base::Time initial_time, | |
| 307 CompletionCallback* callback) { | |
| 308 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 309 operation->DoomEntriesSince(initial_time); | |
| 310 QueueOperation(operation); | |
| 311 } | |
| 312 | |
| 313 void InFlightBackendIO::OpenNextEntry(void** iter, Entry** next_entry, | |
| 314 CompletionCallback* callback) { | |
| 315 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 316 operation->OpenNextEntry(iter, next_entry); | |
| 317 QueueOperation(operation); | |
| 318 } | |
| 319 | |
| 320 void InFlightBackendIO::OpenPrevEntry(void** iter, Entry** prev_entry, | |
| 321 CompletionCallback* callback) { | |
| 322 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 323 operation->OpenPrevEntry(iter, prev_entry); | |
| 324 QueueOperation(operation); | |
| 325 } | |
| 326 | |
| 327 void InFlightBackendIO::EndEnumeration(void* iterator) { | |
| 328 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, NULL); | |
| 329 operation->EndEnumeration(iterator); | |
| 330 QueueOperation(operation); | |
| 331 } | |
| 332 | |
| 333 void InFlightBackendIO::CloseEntryImpl(EntryImpl* entry) { | |
| 334 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, NULL); | |
| 335 operation->CloseEntryImpl(entry); | |
| 336 QueueOperation(operation); | |
| 337 } | |
| 338 | |
| 339 void InFlightBackendIO::DoomEntryImpl(EntryImpl* entry) { | |
| 340 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, NULL); | |
| 341 operation->DoomEntryImpl(entry); | |
| 342 QueueOperation(operation); | |
| 343 } | |
| 344 | |
| 345 void InFlightBackendIO::FlushQueue(net::CompletionCallback* callback) { | |
| 346 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 347 operation->FlushQueue(); | |
| 348 QueueOperation(operation); | |
| 349 } | |
| 350 | |
| 351 void InFlightBackendIO::ReadData(EntryImpl* entry, int index, int offset, | |
| 352 net::IOBuffer* buf, int buf_len, | |
| 353 CompletionCallback* callback) { | |
| 354 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 355 operation->ReadData(entry, index, offset, buf, buf_len); | |
| 356 QueueOperation(operation); | |
| 357 } | |
| 358 | |
| 359 void InFlightBackendIO::WriteData(EntryImpl* entry, int index, int offset, | |
| 360 net::IOBuffer* buf, int buf_len, | |
| 361 bool truncate, | |
| 362 CompletionCallback* callback) { | |
| 363 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 364 operation->WriteData(entry, index, offset, buf, buf_len, truncate); | |
| 365 QueueOperation(operation); | |
| 366 } | |
| 367 | |
| 368 void InFlightBackendIO::ReadSparseData(EntryImpl* entry, int64 offset, | |
| 369 net::IOBuffer* buf, int buf_len, | |
| 370 CompletionCallback* callback) { | |
| 371 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 372 operation->ReadSparseData(entry, offset, buf, buf_len); | |
| 373 QueueOperation(operation); | |
| 374 } | |
| 375 | |
| 376 void InFlightBackendIO::WriteSparseData(EntryImpl* entry, int64 offset, | |
| 377 net::IOBuffer* buf, int buf_len, | |
| 378 CompletionCallback* callback) { | |
| 379 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 380 operation->WriteSparseData(entry, offset, buf, buf_len); | |
| 381 QueueOperation(operation); | |
| 382 } | |
| 383 | |
| 384 void InFlightBackendIO::GetAvailableRange(EntryImpl* entry, int64 offset, | |
| 385 int len, int64* start, | |
| 386 CompletionCallback* callback) { | |
| 387 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 388 operation->GetAvailableRange(entry, offset, len, start); | |
| 389 QueueOperation(operation); | |
| 390 } | |
| 391 | |
| 392 void InFlightBackendIO::CancelSparseIO(EntryImpl* entry) { | |
| 393 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, NULL); | |
| 394 operation->ReadyForSparseIO(entry); | |
| 395 QueueOperation(operation); | |
| 396 } | |
| 397 | |
| 398 void InFlightBackendIO::ReadyForSparseIO(EntryImpl* entry, | |
| 399 CompletionCallback* callback) { | |
| 400 scoped_refptr<BackendIO> operation = new BackendIO(this, backend_, callback); | |
| 401 operation->ReadyForSparseIO(entry); | |
| 402 QueueOperation(operation); | |
| 403 } | |
| 404 | |
| 405 void InFlightBackendIO::WaitForPendingIO() { | |
| 406 // We clear the list first so that we don't post more operations after this | |
| 407 // point. | |
| 408 pending_ops_.clear(); | |
| 409 InFlightIO::WaitForPendingIO(); | |
| 410 } | |
| 411 | |
| 412 void InFlightBackendIO::OnOperationComplete(BackgroundIO* operation, | |
| 413 bool cancel) { | |
| 414 BackendIO* op = static_cast<BackendIO*>(operation); | |
| 415 | |
| 416 if (!op->IsEntryOperation() && !pending_ops_.empty()) { | |
| 417 // Process the next request. Note that invoking the callback may result | |
| 418 // in the backend destruction (and with it this object), so we should deal | |
| 419 // with the next operation before invoking the callback. | |
| 420 scoped_refptr<BackendIO> next_op = pending_ops_.front(); | |
| 421 pending_ops_.pop_front(); | |
| 422 PostOperation(next_op); | |
| 423 } | |
| 424 | |
| 425 if (op->callback() && (!cancel || op->IsEntryOperation())) | |
| 426 op->callback()->Run(op->result()); | |
| 427 | |
| 428 if (cancel) | |
| 429 op->ReleaseEntry(); | |
| 430 } | |
| 431 | |
| 432 void InFlightBackendIO::QueueOperation(BackendIO* operation) { | |
| 433 if (operation->IsEntryOperation()) | |
| 434 return PostOperation(operation); | |
| 435 | |
| 436 if (pending_ops_.empty()) | |
| 437 return PostOperation(operation); | |
| 438 | |
| 439 pending_ops_.push_back(operation); | |
| 440 } | |
| 441 | |
| 442 void InFlightBackendIO::PostOperation(BackendIO* operation) { | |
| 443 background_thread_->PostTask(FROM_HERE, | |
| 444 NewRunnableMethod(operation, &BackendIO::ExecuteOperation)); | |
| 445 OnOperationPosted(operation); | |
| 446 } | |
| 447 | |
| 448 } // namespace | |
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Chromium Code Reviews
Issue 2944002:
Revert 51858 - Disk cache: Switch the disk cache to use the cache_thread. ... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/