108 lines
1.8 KiB
C++
108 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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{
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public:
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UsageInfo()
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: mDatabaseUsage(0)
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, mFileUsage(0)
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, mLimit(0)
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{ }
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virtual ~UsageInfo()
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{ }
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void
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Append(const UsageInfo& aUsageInfo)
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{
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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
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AppendToDatabaseUsage(uint64_t aUsage)
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{
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IncrementUsage(&mDatabaseUsage, aUsage);
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}
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void
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AppendToFileUsage(uint64_t aUsage)
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{
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IncrementUsage(&mFileUsage, aUsage);
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}
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void
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SetLimit(uint64_t aLimit)
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{
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mLimit = aLimit;
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}
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uint64_t
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DatabaseUsage()
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{
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return mDatabaseUsage;
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}
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uint64_t
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FileUsage()
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{
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return mFileUsage;
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}
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uint64_t
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Limit()
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{
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return mLimit;
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}
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uint64_t
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TotalUsage()
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{
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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
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ResetUsage()
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{
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mDatabaseUsage = 0;
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mFileUsage = 0;
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}
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static void
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IncrementUsage(uint64_t* aUsage, uint64_t aDelta)
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{
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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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