Revision control

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "StorageIPC.h"

#include "StorageManager.h"

#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/Unused.h"
#include "nsIDiskSpaceWatcher.h"
#include "nsThreadUtils.h"

namespace mozilla {
namespace dom {

// ----------------------------------------------------------------------------
// Child
// ----------------------------------------------------------------------------

NS_IMPL_ADDREF(StorageDBChild)

NS_IMETHODIMP_(MozExternalRefCountType) StorageDBChild::Release(void)
{
  NS_PRECONDITION(0 != mRefCnt, "dup release");
  nsrefcnt count = --mRefCnt;
  NS_LOG_RELEASE(this, count, "StorageDBChild");
  if (count == 1 && mIPCOpen) {
    Send__delete__(this);
    return 0;
  }
  if (count == 0) {
    mRefCnt = 1;
    delete this;
    return 0;
  }
  return count;
}

void
StorageDBChild::AddIPDLReference()
{
  MOZ_ASSERT(!mIPCOpen, "Attempting to retain multiple IPDL references");
  mIPCOpen = true;
  AddRef();
}

void
StorageDBChild::ReleaseIPDLReference()
{
  MOZ_ASSERT(mIPCOpen, "Attempting to release non-existent IPDL reference");
  mIPCOpen = false;
  Release();
}

StorageDBChild::StorageDBChild(DOMLocalStorageManager* aManager)
  : mManager(aManager)
  , mStatus(NS_OK)
  , mIPCOpen(false)
{
}

StorageDBChild::~StorageDBChild()
{
}

nsTHashtable<nsCStringHashKey>&
StorageDBChild::OriginsHavingData()
{
  if (!mOriginsHavingData) {
    mOriginsHavingData = new nsTHashtable<nsCStringHashKey>;
  }

  return *mOriginsHavingData;
}

nsresult
StorageDBChild::Init()
{
  ContentChild* child = ContentChild::GetSingleton();
  AddIPDLReference();
  child->SendPStorageConstructor(this);
  return NS_OK;
}

nsresult
StorageDBChild::Shutdown()
{
  // There is nothing to do here, IPC will release automatically and
  // the actual thread running on the parent process will also stop
  // automatically in profile-before-change topic observer.
  return NS_OK;
}

void
StorageDBChild::AsyncPreload(StorageCacheBridge* aCache, bool aPriority)
{
  if (mIPCOpen) {
    // Adding ref to cache for the time of preload.  This ensures a reference to
    // to the cache and that all keys will load into this cache object.
    mLoadingCaches.PutEntry(aCache);
    SendAsyncPreload(aCache->OriginSuffix(), aCache->OriginNoSuffix(),
                     aPriority);
  } else {
    // No IPC, no love.  But the LoadDone call is expected.
    aCache->LoadDone(NS_ERROR_UNEXPECTED);
  }
}

void
StorageDBChild::AsyncGetUsage(StorageUsageBridge* aUsage)
{
  if (mIPCOpen) {
    SendAsyncGetUsage(aUsage->OriginScope());
  }
}

void
StorageDBChild::SyncPreload(StorageCacheBridge* aCache, bool aForceSync)
{
  if (NS_FAILED(mStatus)) {
    aCache->LoadDone(mStatus);
    return;
  }

  if (!mIPCOpen) {
    aCache->LoadDone(NS_ERROR_UNEXPECTED);
    return;
  }

  // There is no way to put the child process to a wait state to receive all
  // incoming async responses from the parent, hence we have to do a sync
  // preload instead.  We are smart though, we only demand keys that are left to
  // load in case the async preload has already loaded some keys.
  InfallibleTArray<nsString> keys, values;
  nsresult rv;
  SendPreload(aCache->OriginSuffix(), aCache->OriginNoSuffix(),
              aCache->LoadedCount(), &keys, &values, &rv);

  for (uint32_t i = 0; i < keys.Length(); ++i) {
    aCache->LoadItem(keys[i], values[i]);
  }

  aCache->LoadDone(rv);
}

nsresult
StorageDBChild::AsyncAddItem(StorageCacheBridge* aCache,
                             const nsAString& aKey,
                             const nsAString& aValue)
{
  if (NS_FAILED(mStatus) || !mIPCOpen) {
    return mStatus;
  }

  SendAsyncAddItem(aCache->OriginSuffix(), aCache->OriginNoSuffix(),
                   nsString(aKey), nsString(aValue));
  OriginsHavingData().PutEntry(aCache->Origin());
  return NS_OK;
}

nsresult
StorageDBChild::AsyncUpdateItem(StorageCacheBridge* aCache,
                                const nsAString& aKey,
                                const nsAString& aValue)
{
  if (NS_FAILED(mStatus) || !mIPCOpen) {
    return mStatus;
  }

  SendAsyncUpdateItem(aCache->OriginSuffix(), aCache->OriginNoSuffix(),
                      nsString(aKey), nsString(aValue));
  OriginsHavingData().PutEntry(aCache->Origin());
  return NS_OK;
}

nsresult
StorageDBChild::AsyncRemoveItem(StorageCacheBridge* aCache,
                                const nsAString& aKey)
{
  if (NS_FAILED(mStatus) || !mIPCOpen) {
    return mStatus;
  }

  SendAsyncRemoveItem(aCache->OriginSuffix(), aCache->OriginNoSuffix(),
                      nsString(aKey));
  return NS_OK;
}

nsresult
StorageDBChild::AsyncClear(StorageCacheBridge* aCache)
{
  if (NS_FAILED(mStatus) || !mIPCOpen) {
    return mStatus;
  }

  SendAsyncClear(aCache->OriginSuffix(), aCache->OriginNoSuffix());
  OriginsHavingData().RemoveEntry(aCache->Origin());
  return NS_OK;
}

bool
StorageDBChild::ShouldPreloadOrigin(const nsACString& aOrigin)
{
  // Return true if we didn't receive the origins list yet.
  // I tend to rather preserve a bit of early-after-start performance
  // than a bit of memory here.
  return !mOriginsHavingData || mOriginsHavingData->Contains(aOrigin);
}

mozilla::ipc::IPCResult
StorageDBChild::RecvObserve(const nsCString& aTopic,
                            const nsString& aOriginAttributesPattern,
                            const nsCString& aOriginScope)
{
  StorageObserver::Self()->Notify(
    aTopic.get(), aOriginAttributesPattern, aOriginScope);
  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBChild::RecvOriginsHavingData(nsTArray<nsCString>&& aOrigins)
{
  // Force population of mOriginsHavingData even if there are no origins so that
  // ShouldPreloadOrigin does not generate false positives for all origins.
  if (!aOrigins.Length()) {
    Unused << OriginsHavingData();
  }

  for (uint32_t i = 0; i < aOrigins.Length(); ++i) {
    OriginsHavingData().PutEntry(aOrigins[i]);
  }

  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBChild::RecvLoadItem(const nsCString& aOriginSuffix,
                             const nsCString& aOriginNoSuffix,
                             const nsString& aKey,
                             const nsString& aValue)
{
  StorageCache* aCache = mManager->GetCache(aOriginSuffix, aOriginNoSuffix);
  if (aCache) {
    aCache->LoadItem(aKey, aValue);
  }

  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBChild::RecvLoadDone(const nsCString& aOriginSuffix,
                             const nsCString& aOriginNoSuffix,
                             const nsresult& aRv)
{
  StorageCache* aCache = mManager->GetCache(aOriginSuffix, aOriginNoSuffix);
  if (aCache) {
    aCache->LoadDone(aRv);

    // Just drop reference to this cache now since the load is done.
    mLoadingCaches.RemoveEntry(static_cast<StorageCacheBridge*>(aCache));
  }

  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBChild::RecvLoadUsage(const nsCString& aOriginNoSuffix,
                              const int64_t& aUsage)
{
  RefPtr<StorageUsageBridge> scopeUsage =
    mManager->GetOriginUsage(aOriginNoSuffix);
  scopeUsage->LoadUsage(aUsage);
  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBChild::RecvError(const nsresult& aRv)
{
  mStatus = aRv;
  return IPC_OK();
}

// ----------------------------------------------------------------------------
// Parent
// ----------------------------------------------------------------------------

NS_IMPL_ADDREF(StorageDBParent)
NS_IMPL_RELEASE(StorageDBParent)

void
StorageDBParent::AddIPDLReference()
{
  MOZ_ASSERT(!mIPCOpen, "Attempting to retain multiple IPDL references");
  mIPCOpen = true;
  AddRef();
}

void
StorageDBParent::ReleaseIPDLReference()
{
  MOZ_ASSERT(mIPCOpen, "Attempting to release non-existent IPDL reference");
  mIPCOpen = false;
  Release();
}

namespace {

class SendInitialChildDataRunnable : public Runnable
{
public:
  explicit SendInitialChildDataRunnable(StorageDBParent* aParent)
    : mParent(aParent)
  {}

private:
  NS_IMETHOD Run() override
  {
    if (!mParent->IPCOpen()) {
      return NS_OK;
    }

    StorageDBBridge* db = StorageCache::GetDatabase();
    if (db) {
      InfallibleTArray<nsCString> scopes;
      db->GetOriginsHavingData(&scopes);
      mozilla::Unused << mParent->SendOriginsHavingData(scopes);
    }

    // We need to check if the device is in a low disk space situation, so
    // we can forbid in that case any write in localStorage.
    nsCOMPtr<nsIDiskSpaceWatcher> diskSpaceWatcher =
      do_GetService("@mozilla.org/toolkit/disk-space-watcher;1");
    if (!diskSpaceWatcher) {
      return NS_OK;
    }

    bool lowDiskSpace = false;
    diskSpaceWatcher->GetIsDiskFull(&lowDiskSpace);

    if (lowDiskSpace) {
      mozilla::Unused << mParent->SendObserve(
        nsDependentCString("low-disk-space"), EmptyString(), EmptyCString());
    }

    return NS_OK;
  }

  RefPtr<StorageDBParent> mParent;
};

} // namespace

StorageDBParent::StorageDBParent()
: mIPCOpen(false)
{
  StorageObserver* observer = StorageObserver::Self();
  if (observer) {
    observer->AddSink(this);
  }

  // We are always open by IPC only
  AddIPDLReference();

  // Cannot send directly from here since the channel
  // is not completely built at this moment.
  RefPtr<SendInitialChildDataRunnable> r =
    new SendInitialChildDataRunnable(this);
  NS_DispatchToCurrentThread(r);
}

StorageDBParent::~StorageDBParent()
{
  StorageObserver* observer = StorageObserver::Self();
  if (observer) {
    observer->RemoveSink(this);
  }
}

StorageDBParent::CacheParentBridge*
StorageDBParent::NewCache(const nsACString& aOriginSuffix,
                          const nsACString& aOriginNoSuffix)
{
  return new CacheParentBridge(this, aOriginSuffix, aOriginNoSuffix);
}

void
StorageDBParent::ActorDestroy(ActorDestroyReason aWhy)
{
  // Implement me! Bug 1005169
}

mozilla::ipc::IPCResult
StorageDBParent::RecvAsyncPreload(const nsCString& aOriginSuffix,
                                  const nsCString& aOriginNoSuffix,
                                  const bool& aPriority)
{
  StorageDBBridge* db = StorageCache::StartDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  db->AsyncPreload(NewCache(aOriginSuffix, aOriginNoSuffix), aPriority);
  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBParent::RecvAsyncGetUsage(const nsCString& aOriginNoSuffix)
{
  StorageDBBridge* db = StorageCache::StartDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  // The object releases it self in LoadUsage method
  RefPtr<UsageParentBridge> usage =
    new UsageParentBridge(this, aOriginNoSuffix);
  db->AsyncGetUsage(usage);
  return IPC_OK();
}

namespace {

// We need another implementation of StorageCacheBridge to do
// synchronous IPC preload.  This class just receives Load* notifications
// and fills the returning arguments of RecvPreload with the database
// values for us.
class SyncLoadCacheHelper : public StorageCacheBridge
{
public:
  SyncLoadCacheHelper(const nsCString& aOriginSuffix,
                      const nsCString& aOriginNoSuffix,
                      uint32_t aAlreadyLoadedCount,
                      InfallibleTArray<nsString>* aKeys,
                      InfallibleTArray<nsString>* aValues,
                      nsresult* rv)
  : mMonitor("DOM Storage SyncLoad IPC")
  , mSuffix(aOriginSuffix)
  , mOrigin(aOriginNoSuffix)
  , mKeys(aKeys)
  , mValues(aValues)
  , mRv(rv)
  , mLoaded(false)
  , mLoadedCount(aAlreadyLoadedCount)
  {
    // Precaution
    *mRv = NS_ERROR_UNEXPECTED;
  }

  virtual const nsCString Origin() const
  {
    return StorageManagerBase::CreateOrigin(mSuffix, mOrigin);
  }
  virtual const nsCString& OriginNoSuffix() const { return mOrigin; }
  virtual const nsCString& OriginSuffix() const { return mSuffix; }
  virtual bool Loaded() { return mLoaded; }
  virtual uint32_t LoadedCount() { return mLoadedCount; }
  virtual bool LoadItem(const nsAString& aKey, const nsString& aValue)
  {
    // Called on the aCache background thread
    if (mLoaded) {
      return false;
    }

    ++mLoadedCount;
    mKeys->AppendElement(aKey);
    mValues->AppendElement(aValue);
    return true;
  }

  virtual void LoadDone(nsresult aRv)
  {
    // Called on the aCache background thread
    MonitorAutoLock monitor(mMonitor);
    mLoaded = true;
    *mRv = aRv;
    monitor.Notify();
  }

  virtual void LoadWait()
  {
    // Called on the main thread, exits after LoadDone() call
    MonitorAutoLock monitor(mMonitor);
    while (!mLoaded) {
      monitor.Wait();
    }
  }

private:
  Monitor mMonitor;
  nsCString mSuffix, mOrigin;
  InfallibleTArray<nsString>* mKeys;
  InfallibleTArray<nsString>* mValues;
  nsresult* mRv;
  bool mLoaded;
  uint32_t mLoadedCount;
};

} // namespace

mozilla::ipc::IPCResult
StorageDBParent::RecvPreload(const nsCString& aOriginSuffix,
                             const nsCString& aOriginNoSuffix,
                             const uint32_t& aAlreadyLoadedCount,
                             InfallibleTArray<nsString>* aKeys,
                             InfallibleTArray<nsString>* aValues,
                             nsresult* aRv)
{
  StorageDBBridge* db = StorageCache::StartDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  RefPtr<SyncLoadCacheHelper> cache(
    new SyncLoadCacheHelper(aOriginSuffix, aOriginNoSuffix, aAlreadyLoadedCount,
                            aKeys, aValues, aRv));

  db->SyncPreload(cache, true);
  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBParent::RecvAsyncAddItem(const nsCString& aOriginSuffix,
                                  const nsCString& aOriginNoSuffix,
                                  const nsString& aKey,
                                  const nsString& aValue)
{
  StorageDBBridge* db = StorageCache::StartDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  nsresult rv = db->AsyncAddItem(NewCache(aOriginSuffix, aOriginNoSuffix), aKey,
                                 aValue);
  if (NS_FAILED(rv) && mIPCOpen) {
    mozilla::Unused << SendError(rv);
  }

  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBParent::RecvAsyncUpdateItem(const nsCString& aOriginSuffix,
                                     const nsCString& aOriginNoSuffix,
                                     const nsString& aKey,
                                     const nsString& aValue)
{
  StorageDBBridge* db = StorageCache::StartDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  nsresult rv = db->AsyncUpdateItem(NewCache(aOriginSuffix, aOriginNoSuffix),
                                    aKey, aValue);
  if (NS_FAILED(rv) && mIPCOpen) {
    mozilla::Unused << SendError(rv);
  }

  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBParent::RecvAsyncRemoveItem(const nsCString& aOriginSuffix,
                                     const nsCString& aOriginNoSuffix,
                                     const nsString& aKey)
{
  StorageDBBridge* db = StorageCache::StartDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  nsresult rv = db->AsyncRemoveItem(NewCache(aOriginSuffix, aOriginNoSuffix),
                                    aKey);
  if (NS_FAILED(rv) && mIPCOpen) {
    mozilla::Unused << SendError(rv);
  }

  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBParent::RecvAsyncClear(const nsCString& aOriginSuffix,
                                const nsCString& aOriginNoSuffix)
{
  StorageDBBridge* db = StorageCache::StartDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  nsresult rv = db->AsyncClear(NewCache(aOriginSuffix, aOriginNoSuffix));
  if (NS_FAILED(rv) && mIPCOpen) {
    mozilla::Unused << SendError(rv);
  }

  return IPC_OK();
}

mozilla::ipc::IPCResult
StorageDBParent::RecvAsyncFlush()
{
  StorageDBBridge* db = StorageCache::GetDatabase();
  if (!db) {
    return IPC_FAIL_NO_REASON(this);
  }

  db->AsyncFlush();
  return IPC_OK();
}

// StorageObserverSink

nsresult
StorageDBParent::Observe(const char* aTopic,
                         const nsAString& aOriginAttributesPattern,
                         const nsACString& aOriginScope)
{
  if (mIPCOpen) {
      mozilla::Unused << SendObserve(nsDependentCString(aTopic),
                                     nsString(aOriginAttributesPattern),
                                     nsCString(aOriginScope));
  }

  return NS_OK;
}

namespace {

// Results must be sent back on the main thread
class LoadRunnable : public Runnable
{
public:
  enum TaskType {
    loadItem,
    loadDone
  };

  LoadRunnable(StorageDBParent* aParent,
               TaskType aType,
               const nsACString& aOriginSuffix,
               const nsACString& aOriginNoSuffix,
               const nsAString& aKey = EmptyString(),
               const nsAString& aValue = EmptyString())
  : mParent(aParent)
  , mType(aType)
  , mSuffix(aOriginSuffix)
  , mOrigin(aOriginNoSuffix)
  , mKey(aKey)
  , mValue(aValue)
  { }

  LoadRunnable(StorageDBParent* aParent,
               TaskType aType,
               const nsACString& aOriginSuffix,
               const nsACString& aOriginNoSuffix,
               nsresult aRv)
  : mParent(aParent)
  , mType(aType)
  , mSuffix(aOriginSuffix)
  , mOrigin(aOriginNoSuffix)
  , mRv(aRv)
  { }

private:
  RefPtr<StorageDBParent> mParent;
  TaskType mType;
  nsCString mSuffix, mOrigin;
  nsString mKey;
  nsString mValue;
  nsresult mRv;

  NS_IMETHOD Run() override
  {
    if (!mParent->IPCOpen()) {
      return NS_OK;
    }

    switch (mType)
    {
    case loadItem:
      mozilla::Unused << mParent->SendLoadItem(mSuffix, mOrigin, mKey, mValue);
      break;
    case loadDone:
      mozilla::Unused << mParent->SendLoadDone(mSuffix, mOrigin, mRv);
      break;
    }

    return NS_OK;
  }
};

} // namespace

// StorageDBParent::CacheParentBridge

const nsCString
StorageDBParent::CacheParentBridge::Origin() const
{
  return StorageManagerBase::CreateOrigin(mOriginSuffix, mOriginNoSuffix);
}

bool
StorageDBParent::CacheParentBridge::LoadItem(const nsAString& aKey,
                                             const nsString& aValue)
{
  if (mLoaded) {
    return false;
  }

  ++mLoadedCount;

  RefPtr<LoadRunnable> r =
    new LoadRunnable(mParent, LoadRunnable::loadItem, mOriginSuffix,
                     mOriginNoSuffix, aKey, aValue);
  NS_DispatchToMainThread(r);
  return true;
}

void
StorageDBParent::CacheParentBridge::LoadDone(nsresult aRv)
{
  // Prevent send of duplicate LoadDone.
  if (mLoaded) {
    return;
  }

  mLoaded = true;

  RefPtr<LoadRunnable> r =
    new LoadRunnable(mParent, LoadRunnable::loadDone, mOriginSuffix,
                     mOriginNoSuffix, aRv);
  NS_DispatchToMainThread(r);
}

void
StorageDBParent::CacheParentBridge::LoadWait()
{
  // Should never be called on this implementation
  MOZ_ASSERT(false);
}

// StorageDBParent::UsageParentBridge

namespace {

class UsageRunnable : public Runnable
{
public:
  UsageRunnable(StorageDBParent* aParent, const nsACString& aOriginScope,
                const int64_t& aUsage)
    : mParent(aParent)
    , mOriginScope(aOriginScope)
    , mUsage(aUsage)
  {}

private:
  NS_IMETHOD Run() override
  {
    if (!mParent->IPCOpen()) {
      return NS_OK;
    }

    mozilla::Unused << mParent->SendLoadUsage(mOriginScope, mUsage);
    return NS_OK;
  }

  RefPtr<StorageDBParent> mParent;
  nsCString mOriginScope;
  int64_t mUsage;
};

} // namespace

void
StorageDBParent::UsageParentBridge::LoadUsage(const int64_t aUsage)
{
  RefPtr<UsageRunnable> r = new UsageRunnable(mParent, mOriginScope, aUsage);
  NS_DispatchToMainThread(r);
}

} // namespace dom
} // namespace mozilla