UniversalDirectoryLock.cpp

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/* -*- 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 "UniversalDirectoryLock.h"

#include <utility>

#include "nsDebug.h"

#include "nsString.h"

#include "mozilla/Assertions.h"

#include "mozilla/NotNull.h"

#include "mozilla/RefPtr.h"

#include "mozilla/ReverseIterator.h"

#include "mozilla/dom/Nullable.h"

#include "mozilla/dom/quota/ClientDirectoryLock.h"

#include "mozilla/dom/quota/CommonMetadata.h"

#include "mozilla/dom/quota/OriginScope.h"

#include "mozilla/dom/quota/PersistenceScope.h"

#include "mozilla/dom/quota/QuotaManager.h"

namespace mozilla::dom::quota {

RefPtr<ClientDirectoryLock> UniversalDirectoryLock::SpecializeForClient(

    PersistenceType aPersistenceType,

    const quota::OriginMetadata& aOriginMetadata,

    Client::Type aClientType) const {

  AssertIsOnOwningThread();

  MOZ_ASSERT(aPersistenceType != PERSISTENCE_TYPE_INVALID);

  MOZ_ASSERT(!aOriginMetadata.mGroup.IsEmpty());

  MOZ_ASSERT(!aOriginMetadata.mOrigin.IsEmpty());

  MOZ_ASSERT(aClientType < Client::TypeMax());

  MOZ_ASSERT(mAcquirePromiseHolder.IsEmpty());

  MOZ_ASSERT(mBlockedOn.IsEmpty());

  if (NS_WARN_IF(mExclusive)) {

    return nullptr;

  RefPtr<ClientDirectoryLock> lock = ClientDirectoryLock::Create(

      mQuotaManager, PersistenceScope::CreateFromValue(aPersistenceType),

      OriginScope::FromOrigin(aOriginMetadata),

      Nullable<Client::Type>(aClientType),

      /* aExclusive */ false, mInternal, ShouldUpdateLockIdTableFlag::Yes,

      mCategory);

  if (NS_WARN_IF(!Overlaps(*lock))) {

    return nullptr;

#ifdef DEBUG

  for (DirectoryLockImpl* const existingLock :

       Reversed(mQuotaManager->mDirectoryLocks)) {

    if (existingLock != this && !existingLock->MustWaitFor(*this)) {

      MOZ_ASSERT(!existingLock->MustWaitFor(*lock));

#endif

  for (const auto& blockedLock : mBlocking) {

    if (blockedLock->MustWaitFor(*lock)) {

      lock->AddBlockingLock(*blockedLock);

      blockedLock->AddBlockedOnLock(*lock);

  mQuotaManager->RegisterDirectoryLock(*lock);

  if (mInvalidated) {

    lock->Invalidate();

  return lock;

// static

RefPtr<UniversalDirectoryLock> UniversalDirectoryLock::CreateInternal(

    MovingNotNull<RefPtr<QuotaManager>> aQuotaManager,

    const PersistenceScope& aPersistenceScope, const OriginScope& aOriginScope,

    const Nullable<Client::Type>& aClientType, bool aExclusive,

    DirectoryLockCategory aCategory) {

  MOZ_ASSERT_IF(aOriginScope.IsOrigin(), !aOriginScope.GetOrigin().IsEmpty());

  return MakeRefPtr<UniversalDirectoryLock>(

      std::move(aQuotaManager), aPersistenceScope, aOriginScope, aClientType,

      aExclusive, true, ShouldUpdateLockIdTableFlag::Yes, aCategory);

}  // namespace mozilla::dom::quota