QuotaTracker.cpp   [plain text]

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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#include "config.h"
#include "QuotaTracker.h"
#include "PlatformSupport.h"

#if ENABLE(SQL_DATABASE)

#include <wtf/StdLibExtras.h>

namespace WebCore {

QuotaTracker& QuotaTracker::instance()
{
    AtomicallyInitializedStatic(QuotaTracker&, tracker = *new QuotaTracker);
    return tracker;
}

void QuotaTracker::getDatabaseSizeAndSpaceAvailableToOrigin(
    const String& originIdentifier, const String& databaseName,
    unsigned long long* databaseSize, unsigned long long* spaceAvailable)
{
    // Extra scope to unlock prior to potentially calling PlatformSupport.
    {
        MutexLocker lockData(m_dataGuard);
        ASSERT(m_databaseSizes.contains(originIdentifier));
        HashMap<String, SizeMap>::const_iterator it = m_databaseSizes.find(originIdentifier);
        ASSERT(it->second.contains(databaseName));
        *databaseSize = it->second.get(databaseName);

        if (m_spaceAvailableToOrigins.contains(originIdentifier)) {
            *spaceAvailable = m_spaceAvailableToOrigins.get(originIdentifier);
            return;
        }
    }

    // The embedder hasn't pushed this value to us, so we pull it as needed.
    *spaceAvailable = PlatformSupport::databaseGetSpaceAvailableForOrigin(originIdentifier);
}

void QuotaTracker::updateDatabaseSize(
    const String& originIdentifier, const String& databaseName,
    unsigned long long databaseSize)
{
    MutexLocker lockData(m_dataGuard);
    HashMap<String, SizeMap>::iterator it = m_databaseSizes.add(originIdentifier, SizeMap()).iterator;
    it->second.set(databaseName, databaseSize);
}

void QuotaTracker::updateSpaceAvailableToOrigin(const String& originIdentifier, unsigned long long spaceAvailable)
{
    MutexLocker lockData(m_dataGuard);
    m_spaceAvailableToOrigins.set(originIdentifier, spaceAvailable);
}

void QuotaTracker::resetSpaceAvailableToOrigin(const String& originIdentifier)
{
    MutexLocker lockData(m_dataGuard);
    m_spaceAvailableToOrigins.remove(originIdentifier);
}

} // namespace WebCore

#endif // ENABLE(SQL_DATABASE)