зеркало из https://github.com/mozilla/gecko-dev.git
75 строки
1.8 KiB
C++
75 строки
1.8 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 {
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public:
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UsageInfo() : mDatabaseUsage(0), mFileUsage(0), mLimit(0) {}
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virtual ~UsageInfo() {}
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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(uint64_t aUsage) {
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IncrementUsage(&mDatabaseUsage, aUsage);
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}
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void AppendToFileUsage(uint64_t aUsage) {
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IncrementUsage(&mFileUsage, aUsage);
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}
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void SetLimit(uint64_t aLimit) { mLimit = aLimit; }
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uint64_t DatabaseUsage() { return mDatabaseUsage; }
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uint64_t FileUsage() { return mFileUsage; }
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uint64_t Limit() { return mLimit; }
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uint64_t TotalUsage() {
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uint64_t totalUsage = mDatabaseUsage;
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IncrementUsage(&totalUsage, mFileUsage);
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return totalUsage;
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}
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void ResetUsage() {
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mDatabaseUsage = 0;
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mFileUsage = 0;
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}
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static void IncrementUsage(uint64_t* aUsage, uint64_t aDelta) {
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MOZ_ASSERT(aUsage);
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CheckedUint64 value = *aUsage;
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value += aDelta;
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if (value.isValid()) {
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*aUsage = value.value();
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} else {
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*aUsage = UINT64_MAX;
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}
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}
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private:
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uint64_t mDatabaseUsage;
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uint64_t mFileUsage;
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uint64_t mLimit;
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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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