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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "QuotaIncreaseRequestIdentifier.h"
#include <wtf/CompletionHandler.h>
#include <wtf/Deque.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/ThreadSafeWeakPtr.h>
namespace WebKit {
class OriginQuotaManager : public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<OriginQuotaManager> {
WTF_MAKE_TZONE_ALLOCATED(OriginQuotaManager);
public:
using GetUsageFunction = Function<uint64_t()>;
using IncreaseQuotaFunction = Function<void(QuotaIncreaseRequestIdentifier, uint64_t currentQuota, uint64_t currentUsage, uint64_t requestedIncrease)>;
using NotifySpaceGrantedFunction = Function<void(uint64_t)>;
struct Parameters {
uint64_t quota { 0 };
uint64_t standardReportedQuota { 0 };
IncreaseQuotaFunction increaseQuotaFunction;
NotifySpaceGrantedFunction notifySpaceGrantedFunction;
};
static Ref<OriginQuotaManager> create(Parameters&&, GetUsageFunction&&);
uint64_t reportedQuota();
uint64_t usage();
enum class Decision : bool { Deny, Grant };
using RequestCallback = CompletionHandler<void(Decision)>;
void requestSpace(uint64_t spaceRequested, RequestCallback&&);
void didIncreaseQuota(QuotaIncreaseRequestIdentifier, std::optional<uint64_t> newQuota);
void resetQuotaUpdatedBasedOnUsageForTesting();
void resetQuotaForTesting();
void updateParametersForTesting(Parameters&&);
private:
OriginQuotaManager(Parameters&&, GetUsageFunction&&);
void handleRequests();
bool grantWithCurrentQuota(uint64_t spaceRequested);
bool grantFastPath(uint64_t spaceRequested);
void spaceGranted(uint64_t amount);
struct Request {
uint64_t spaceRequested;
RequestCallback callback;
Markable<QuotaIncreaseRequestIdentifier> identifier;
};
Deque<Request> m_requests;
std::optional<Request> m_currentRequest;
bool m_isHandlingRequests { false };
uint64_t m_quotaCountdown { 0 };
uint64_t m_quota;
uint64_t m_standardReportedQuota;
uint64_t m_initialQuota; // Test only.
std::optional<uint64_t> m_usage;
GetUsageFunction m_getUsageFunction;
IncreaseQuotaFunction m_increaseQuotaFunction;
NotifySpaceGrantedFunction m_notifySpaceGrantedFunction;
};
} // namespace WebKit
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