/*
* Copyright (C) 2010 Google, 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. ``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
* 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.
*/
#ifndef ResourceLoadTiming_h
#define ResourceLoadTiming_h
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
namespace WebCore {
class DocumentLoadTiming;
class ResourceLoadTiming : public RefCounted<ResourceLoadTiming> {
public:
static PassRefPtr<ResourceLoadTiming> create()
{
return adoptRef(new ResourceLoadTiming);
}
PassRefPtr<ResourceLoadTiming> deepCopy()
{
RefPtr<ResourceLoadTiming> timing = create();
timing->requestTime = requestTime;
timing->proxyStart = proxyStart;
timing->proxyEnd = proxyEnd;
timing->dnsStart = dnsStart;
timing->dnsEnd = dnsEnd;
timing->connectStart = connectStart;
timing->connectEnd = connectEnd;
timing->sendStart = sendStart;
timing->sendEnd = sendEnd;
timing->receiveHeadersEnd = receiveHeadersEnd;
timing->sslStart = sslStart;
timing->sslEnd = sslEnd;
return timing.release();
}
bool operator==(const ResourceLoadTiming& other) const
{
return requestTime == other.requestTime
&& proxyStart == other.proxyStart
&& proxyEnd == other.proxyEnd
&& dnsStart == other.dnsStart
&& dnsEnd == other.dnsEnd
&& connectStart == other.connectStart
&& connectEnd == other.connectEnd
&& sendStart == other.sendStart
&& sendEnd == other.sendEnd
&& receiveHeadersEnd == other.receiveHeadersEnd
&& sslStart == other.sslStart
&& sslEnd == other.sslEnd;
}
bool operator!=(const ResourceLoadTiming& other) const
{
return !(*this == other);
}
// We want to present a unified timeline to Javascript. Using walltime is problematic, because the clock may skew while resources
// load. To prevent that skew, we record a single reference walltime when root document navigation begins. All other times are
// recorded using monotonicallyIncreasingTime(). When a time needs to be presented to Javascript, we build a pseudo-walltime
// using the following equation (requestTime as example):
// pseudo time = document wall reference + (requestTime - document monotonic reference).
double requestTime; // All monotonicallyIncreasingTime() in seconds
double proxyStart;
double proxyEnd;
double dnsStart;
double dnsEnd;
double connectStart;
double connectEnd;
double sendStart;
double sendEnd;
double receiveHeadersEnd;
double sslStart;
double sslEnd;
double calculateMillisecondDelta(double time) const { return time ? (time - requestTime) * 1000 : -1; }
private:
ResourceLoadTiming()
: requestTime(0)
, proxyStart(0)
, proxyEnd(0)
, dnsStart(0)
, dnsEnd(0)
, connectStart(0)
, connectEnd(0)
, sendStart(0)
, sendEnd(0)
, receiveHeadersEnd(0)
, sslStart(0)
, sslEnd(0)
{
}
};
}
#endif