зеркало из https://github.com/mozilla/gecko-dev.git
83 строки
2.0 KiB
C++
83 строки
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_quota_usageinfo_h__
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#define mozilla_dom_quota_usageinfo_h__
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#include "mozilla/dom/quota/QuotaCommon.h"
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#include "mozilla/CheckedInt.h"
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BEGIN_QUOTA_NAMESPACE
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enum struct UsageKind { Database, File };
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template <UsageKind Kind>
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struct Usage {
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explicit Usage(Maybe<uint64_t> aValue = Nothing{}) : mValue(aValue) {}
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Maybe<uint64_t> GetValue() const { return mValue; }
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Usage& operator+=(const Usage aDelta) {
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if (aDelta.mValue.isSome()) {
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CheckedUint64 value = mValue.valueOr(0);
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value += aDelta.mValue.value();
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mValue = Some(value.isValid() ? value.value() : UINT64_MAX);
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}
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return *this;
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}
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Usage operator+(const Usage aDelta) const {
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Usage res = *this;
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res += aDelta;
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return res;
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}
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private:
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Maybe<uint64_t> mValue;
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};
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using DatabaseUsageType = Usage<UsageKind::Database>;
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using FileUsageType = Usage<UsageKind::File>;
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class UsageInfo final {
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public:
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UsageInfo& operator+=(const UsageInfo& aUsageInfo) {
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mDatabaseUsage += aUsageInfo.mDatabaseUsage;
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mFileUsage += aUsageInfo.mFileUsage;
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return *this;
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}
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UsageInfo& operator+=(const DatabaseUsageType aUsage) {
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mDatabaseUsage += aUsage;
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return *this;
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}
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UsageInfo& operator+=(const FileUsageType aUsage) {
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mFileUsage += aUsage;
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return *this;
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}
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Maybe<uint64_t> FileUsage() const { return mFileUsage.GetValue(); }
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Maybe<uint64_t> TotalUsage() const {
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const uint64_t res =
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mDatabaseUsage.GetValue().valueOr(0) + FileUsage().valueOr(0);
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return res ? Some(res) : Nothing();
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}
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private:
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DatabaseUsageType mDatabaseUsage;
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FileUsageType mFileUsage;
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};
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END_QUOTA_NAMESPACE
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#endif // mozilla_dom_quota_usageinfo_h__
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