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/*
* Copyright 2011, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER 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.
*/
#include "PerformanceMonitor.h"
#include <wtf/text/CString.h>
namespace WebCore {
PerformanceMonitor::PerformanceMonitor()
{
}
PerformanceMonitor::~PerformanceMonitor()
{
}
void PerformanceMonitor::start(const String &tag)
{
if (tag.isEmpty())
return;
PerfItem *item;
if (m_tags.contains(tag))
item = m_tags.get(tag);
else {
item = new PerfItem();
m_tags.set(tag, item);
}
gettimeofday(&(item->start_time), NULL);
}
void PerformanceMonitor::stop(const String &tag)
{
if (!m_tags.contains(tag))
return;
PerfItem *item = m_tags.get(tag);
struct timeval end;
gettimeofday(&end, NULL);
long seconds, useconds;
seconds = end.tv_sec - item->start_time.tv_sec;
useconds = end.tv_usec - item->start_time.tv_usec;
float mtime = (seconds * 1000.0) + (useconds/1000.0);
float avg = 0;
if (item->average_ms) {
item->average_ms = (item->average_ms + mtime) / 2;
} else
item->average_ms = mtime;
}
float PerformanceMonitor::getAverageDuration(const String &tag)
{
if (tag.isEmpty() || !m_tags.contains(tag))
return 0;
return m_tags.get(tag)->average_ms;
}
} // namespace WebCore
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