tor-browser

The Tor Browser
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FirstInitializationAttempts.h (2430B)

      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 DOM_QUOTA_FIRSTINITIALIZATIONATTEMPTS_H_
      8 #define DOM_QUOTA_FIRSTINITIALIZATIONATTEMPTS_H_
      9 
     10 #include <utility>
     11 
     12 #include "ErrorList.h"
     13 
     14 namespace mozilla::dom::quota {
     15 
     16 template <typename Initialization, typename StringGenerator>
     17 class FirstInitializationAttempts {
     18  Initialization mFirstInitializationAttempts = Initialization::None;
     19 
     20 public:
     21  class FirstInitializationAttemptImpl {
     22    using FirstInitializationAttemptsType =
     23        FirstInitializationAttempts<Initialization, StringGenerator>;
     24 
     25    FirstInitializationAttemptsType& mOwner;
     26    const Initialization mInitialization;
     27 
     28   public:
     29    FirstInitializationAttemptImpl(FirstInitializationAttemptsType& aOwner,
     30                                   const Initialization aInitialization)
     31        : mOwner(aOwner), mInitialization(aInitialization) {}
     32 
     33    bool Recorded() const {
     34      return mOwner.FirstInitializationAttemptRecorded(mInitialization);
     35    }
     36 
     37    void Record(const nsresult aRv) const {
     38      mOwner.RecordFirstInitializationAttempt(mInitialization, aRv);
     39    }
     40  };
     41 
     42  template <typename Func>
     43  auto WithFirstInitializationAttempt(const Initialization aInitialization,
     44                                      Func&& aFunc)
     45      -> std::invoke_result_t<Func, FirstInitializationAttemptImpl&&> {
     46    return std::forward<Func>(aFunc)(
     47        FirstInitializationAttemptImpl(*this, aInitialization));
     48  }
     49 
     50  bool FirstInitializationAttemptRecorded(
     51      const Initialization aInitialization) const {
     52    return static_cast<bool>(mFirstInitializationAttempts & aInitialization);
     53  }
     54 
     55  void RecordFirstInitializationAttempt(const Initialization aInitialization,
     56                                        nsresult aRv);
     57 
     58  void ResetFirstInitializationAttempts() {
     59    mFirstInitializationAttempts = Initialization::None;
     60  }
     61 };
     62 
     63 template <typename Initialization, typename StringGenerator>
     64 using FirstInitializationAttempt = typename FirstInitializationAttempts<
     65    Initialization, StringGenerator>::FirstInitializationAttemptImpl;
     66 
     67 }  // namespace mozilla::dom::quota
     68 
     69 #endif  // DOM_QUOTA_FIRSTINITIALIZATIONATTEMPTS_H_