NetworkResourceLoadSchedulerMac.mm   [plain text]

/*
 * Copyright (C) 2012 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * 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
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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#import "config.h"
#import "NetworkResourceLoadScheduler.h"

#import <WebCore/ResourceRequest.h>
#import <WebCore/ResourceRequestCFNet.h>
#import <WebCore/WebCoreSystemInterface.h>
#import <WebKitSystemInterface.h>

#if ENABLE(NETWORK_PROCESS)

using namespace WebCore;

namespace WebKit {

void NetworkResourceLoadScheduler::platformInitializeMaximumHTTPConnectionCountPerHost()
{
    static const unsigned preferredConnectionCount = 6;
    static const unsigned unlimitedRequestCount = 10000;

    unsigned maximumHTTPConnectionCountPerHost = WKInitializeMaximumHTTPConnectionCountPerHost(preferredConnectionCount);

    Boolean keyExistsAndHasValidFormat = false;
    Boolean prefValue = CFPreferencesGetAppBooleanValue(CFSTR("WebKitEnableHTTPPipelining"), kCFPreferencesCurrentApplication, &keyExistsAndHasValidFormat);
    if (keyExistsAndHasValidFormat)
        ResourceRequest::setHTTPPipeliningEnabled(prefValue);

    if (ResourceRequest::resourcePrioritiesEnabled()) {
        WKSetHTTPRequestMaximumPriority(toPlatformRequestPriority(ResourceLoadPriorityHighest));
        WKSetHTTPRequestMinimumFastLanePriority(toPlatformRequestPriority(ResourceLoadPriorityMedium));
        m_maxRequestsInFlightPerHost = unlimitedRequestCount;
    } else {
        // Use WebKit scheduler when we can't use request priorities with CFNetwork.
        m_maxRequestsInFlightPerHost = maximumHTTPConnectionCountPerHost;
    }
}

} // namespace WebKit

#endif // ENABLE(NETWORK_PROCESS)