dom/indexedDB/ThreadLocal.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_indexeddb_threadlocal_h__
   8 #define mozilla_dom_indexeddb_threadlocal_h__
   9
  10 #include "IDBTransaction.h"
  11 #include "mozilla/dom/indexedDB/PBackgroundIDBSharedTypes.h"
  12 #include "ProfilerHelpers.h"
  13
  14 namespace mozilla::dom {
  15
  16 class IDBFactory;
  17
  18 namespace indexedDB {
  19
  20 class ThreadLocal {
  21   friend class DefaultDelete<ThreadLocal>;
  22   friend IDBFactory;
  23
  24   LoggingInfo mLoggingInfo;
  25   Maybe<IDBTransaction&> mCurrentTransaction;
  26   LoggingIdString<false> mLoggingIdString;
  27
  28   NS_DECL_OWNINGTHREAD
  29
  30  public:
  31   ThreadLocal() = delete;
  32   ThreadLocal(const ThreadLocal& aOther) = delete;
  33
  34   void AssertIsOnOwningThread() const { NS_ASSERT_OWNINGTHREAD(ThreadLocal); }
  35
  36   const LoggingInfo& GetLoggingInfo() const {
  37     AssertIsOnOwningThread();
  38
  39     return mLoggingInfo;
  40   }
  41
  42   const nsID& Id() const {
  43     AssertIsOnOwningThread();
  44
  45     return mLoggingInfo.backgroundChildLoggingId();
  46   }
  47
  48   const nsCString& IdString() const {
  49     AssertIsOnOwningThread();
  50
  51     return mLoggingIdString;
  52   }
  53
  54   int64_t NextTransactionSN(IDBTransaction::Mode aMode) {
  55     AssertIsOnOwningThread();
  56     MOZ_ASSERT(mLoggingInfo.nextTransactionSerialNumber() < INT64_MAX);
  57     MOZ_ASSERT(mLoggingInfo.nextVersionChangeTransactionSerialNumber() >
  58                INT64_MIN);
  59
  60     if (aMode == IDBTransaction::Mode::VersionChange) {
  61       return mLoggingInfo.nextVersionChangeTransactionSerialNumber()--;
  62     }
  63
  64     return mLoggingInfo.nextTransactionSerialNumber()++;
  65   }
  66
  67   uint64_t NextRequestSN() {
  68     AssertIsOnOwningThread();
  69     MOZ_ASSERT(mLoggingInfo.nextRequestSerialNumber() < UINT64_MAX);
  70
  71     return mLoggingInfo.nextRequestSerialNumber()++;
  72   }
  73
  74   void SetCurrentTransaction(Maybe<IDBTransaction&> aCurrentTransaction) {
  75     AssertIsOnOwningThread();
  76
  77     mCurrentTransaction = aCurrentTransaction;
  78   }
  79
  80   Maybe<IDBTransaction&> MaybeCurrentTransactionRef() const {
  81     AssertIsOnOwningThread();
  82
  83     return mCurrentTransaction;
  84   }
  85
  86  private:
  87   explicit ThreadLocal(const nsID& aBackgroundChildLoggingId);
  88   ~ThreadLocal();
  89 };
  90
  91 }  // namespace indexedDB
  92 }  // namespace mozilla::dom
  93
  94 #endif  // mozilla_dom_indexeddb_threadlocal_h__