зеркало из https://github.com/mozilla/gecko-dev.git
70 строки
1.7 KiB
C++
70 строки
1.7 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/Atomics.h"
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#include "mozilla/CheckedInt.h"
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BEGIN_QUOTA_NAMESPACE
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class UsageInfo final {
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public:
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void Append(const UsageInfo& aUsageInfo) {
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IncrementUsage(mDatabaseUsage, aUsageInfo.mDatabaseUsage);
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IncrementUsage(mFileUsage, aUsageInfo.mFileUsage);
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}
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void AppendToDatabaseUsage(const Maybe<uint64_t>& aUsage) {
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IncrementUsage(mDatabaseUsage, aUsage);
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}
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void AppendToFileUsage(const Maybe<uint64_t>& aUsage) {
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IncrementUsage(mFileUsage, aUsage);
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}
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const Maybe<uint64_t>& DatabaseUsage() const { return mDatabaseUsage; }
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const Maybe<uint64_t>& FileUsage() const { return mFileUsage; }
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Maybe<uint64_t> TotalUsage() {
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Maybe<uint64_t> totalUsage;
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IncrementUsage(totalUsage, mDatabaseUsage);
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IncrementUsage(totalUsage, mFileUsage);
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return totalUsage;
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}
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static void IncrementUsage(Maybe<uint64_t>& aUsage,
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const Maybe<uint64_t>& aDelta) {
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if (aDelta.isNothing()) {
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return;
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}
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CheckedUint64 value = aUsage.valueOr(0);
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value += aDelta.value();
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if (value.isValid()) {
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aUsage = Some(value.value());
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} else {
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aUsage = Some(UINT64_MAX);
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}
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}
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private:
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Maybe<uint64_t> mDatabaseUsage;
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Maybe<uint64_t> 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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