DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (35bba5f95485)

VCS Links

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
/* -*- 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 "IDBMutableFile.h"

#include "ActorsChild.h"
#include "FileInfo.h"
#include "IDBDatabase.h"
#include "IDBFactory.h"
#include "IDBFileHandle.h"
#include "IDBFileRequest.h"
#include "IndexedDatabaseManager.h"
#include "MainThreadUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/IDBMutableFileBinding.h"
#include "mozilla/dom/indexedDB/PBackgroundIDBSharedTypes.h"
#include "mozilla/dom/quota/FileStreams.h"
#include "mozilla/dom/quota/QuotaManager.h"
#include "mozilla/ipc/BackgroundUtils.h"
#include "mozilla/ipc/PBackgroundSharedTypes.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsError.h"
#include "ReportInternalError.h"

namespace mozilla {
namespace dom {

using namespace mozilla::dom::indexedDB;
using namespace mozilla::dom::quota;

IDBMutableFile::IDBMutableFile(IDBDatabase* aDatabase,
                               BackgroundMutableFileChild* aActor,
                               const nsAString& aName, const nsAString& aType)
    : DOMEventTargetHelper(aDatabase),
      mDatabase(aDatabase),
      mBackgroundActor(aActor),
      mName(aName),
      mType(aType),
      mInvalidated(false) {
  MOZ_ASSERT(aDatabase);
  aDatabase->AssertIsOnOwningThread();
  MOZ_ASSERT(aActor);

  mDatabase->NoteLiveMutableFile(this);
}

IDBMutableFile::~IDBMutableFile() {
  AssertIsOnOwningThread();

  mDatabase->NoteFinishedMutableFile(this);

  if (mBackgroundActor) {
    mBackgroundActor->SendDeleteMeInternal();
    MOZ_ASSERT(!mBackgroundActor, "SendDeleteMeInternal should have cleared!");
  }
}

#ifdef DEBUG

void IDBMutableFile::AssertIsOnOwningThread() const {
  MOZ_ASSERT(mDatabase);
  mDatabase->AssertIsOnOwningThread();
}

#endif  // DEBUG

int64_t IDBMutableFile::GetFileId() const {
  AssertIsOnOwningThread();

  int64_t fileId;
  if (!mBackgroundActor ||
      NS_WARN_IF(!mBackgroundActor->SendGetFileId(&fileId))) {
    return -1;
  }

  return fileId;
}

void IDBMutableFile::Invalidate() {
  AssertIsOnOwningThread();
  MOZ_ASSERT(!mInvalidated);

  mInvalidated = true;

  AbortFileHandles();
}

void IDBMutableFile::RegisterFileHandle(IDBFileHandle* aFileHandle) {
  AssertIsOnOwningThread();
  MOZ_ASSERT(aFileHandle);
  aFileHandle->AssertIsOnOwningThread();
  MOZ_ASSERT(!mFileHandles.Contains(aFileHandle));

  mFileHandles.PutEntry(aFileHandle);
}

void IDBMutableFile::UnregisterFileHandle(IDBFileHandle* aFileHandle) {
  AssertIsOnOwningThread();
  MOZ_ASSERT(aFileHandle);
  aFileHandle->AssertIsOnOwningThread();
  MOZ_ASSERT(mFileHandles.Contains(aFileHandle));

  mFileHandles.RemoveEntry(aFileHandle);
}

void IDBMutableFile::AbortFileHandles() {
  AssertIsOnOwningThread();

  class MOZ_STACK_CLASS Helper final {
   public:
    static void AbortFileHandles(
        nsTHashtable<nsPtrHashKey<IDBFileHandle>>& aTable) {
      if (!aTable.Count()) {
        return;
      }

      nsTArray<RefPtr<IDBFileHandle>> fileHandlesToAbort;
      fileHandlesToAbort.SetCapacity(aTable.Count());

      for (auto iter = aTable.Iter(); !iter.Done(); iter.Next()) {
        IDBFileHandle* fileHandle = iter.Get()->GetKey();
        MOZ_ASSERT(fileHandle);

        fileHandle->AssertIsOnOwningThread();

        if (!fileHandle->IsDone()) {
          fileHandlesToAbort.AppendElement(iter.Get()->GetKey());
        }
      }
      MOZ_ASSERT(fileHandlesToAbort.Length() <= aTable.Count());

      if (fileHandlesToAbort.IsEmpty()) {
        return;
      }

      for (RefPtr<IDBFileHandle>& fileHandle : fileHandlesToAbort) {
        MOZ_ASSERT(fileHandle);

        fileHandle->Abort();
      }
    }
  };

  Helper::AbortFileHandles(mFileHandles);
}

IDBDatabase* IDBMutableFile::Database() const {
  AssertIsOnOwningThread();

  return mDatabase;
}

RefPtr<IDBFileHandle> IDBMutableFile::Open(FileMode aMode,
                                           ErrorResult& aError) {
  AssertIsOnOwningThread();

  if (QuotaManager::IsShuttingDown() || mDatabase->IsClosed() || !GetOwner()) {
    aError.Throw(NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR);
    return nullptr;
  }

  auto fileHandle = IDBFileHandle::Create(this, aMode);
  if (NS_WARN_IF(!fileHandle)) {
    aError.Throw(NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR);
    return nullptr;
  }

  BackgroundFileHandleChild* actor = new BackgroundFileHandleChild(fileHandle);

  MOZ_ALWAYS_TRUE(
      mBackgroundActor->SendPBackgroundFileHandleConstructor(actor, aMode));

  fileHandle->SetBackgroundActor(actor);

  return fileHandle;
}

RefPtr<DOMRequest> IDBMutableFile::GetFile(ErrorResult& aError) {
  RefPtr<IDBFileHandle> fileHandle = Open(FileMode::Readonly, aError);
  if (NS_WARN_IF(aError.Failed())) {
    return nullptr;
  }

  FileRequestGetFileParams params;

  auto request =
      IDBFileRequest::Create(fileHandle, /* aWrapAsDOMRequest */ true);

  fileHandle->StartRequest(request, params);

  return request;
}

NS_IMPL_ADDREF_INHERITED(IDBMutableFile, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(IDBMutableFile, DOMEventTargetHelper)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IDBMutableFile)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)

NS_IMPL_CYCLE_COLLECTION_CLASS(IDBMutableFile)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBMutableFile,
                                                  DOMEventTargetHelper)
  tmp->AssertIsOnOwningThread();
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDatabase)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBMutableFile,
                                                DOMEventTargetHelper)
  tmp->AssertIsOnOwningThread();

  // Don't unlink mDatabase!
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

JSObject* IDBMutableFile::WrapObject(JSContext* aCx,
                                     JS::Handle<JSObject*> aGivenProto) {
  return IDBMutableFile_Binding::Wrap(aCx, this, aGivenProto);
}

}  // namespace dom
}  // namespace mozilla