/* | |
* Copyright (C) 2009 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. ``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. | |
*/ | |
#include "config.h" | |
#include "PluginHalter.h" | |
#include "HaltablePlugin.h" | |
#include "PlatformString.h" | |
#include <wtf/CurrentTime.h> | |
#include <wtf/Vector.h> | |
using namespace std; | |
namespace WebCore { | |
PluginHalter::PluginHalter(PluginHalterClient* client) | |
: m_client(client) | |
, m_timer(this, &PluginHalter::timerFired) | |
, m_pluginAllowedRunTime(numeric_limits<unsigned>::max()) | |
{ | |
ASSERT_ARG(client, client); | |
} | |
void PluginHalter::didStartPlugin(HaltablePlugin* obj) | |
{ | |
ASSERT_ARG(obj, obj); | |
ASSERT_ARG(obj, !m_plugins.contains(obj)); | |
if (!m_client->enabled()) | |
return; | |
double currentTime = WTF::currentTime(); | |
m_plugins.add(obj, currentTime); | |
if (m_plugins.size() == 1) | |
m_oldestStartTime = currentTime; | |
startTimerIfNecessary(); | |
} | |
void PluginHalter::didStopPlugin(HaltablePlugin* obj) | |
{ | |
if (!m_client->enabled()) | |
return; | |
m_plugins.remove(obj); | |
} | |
void PluginHalter::timerFired(Timer<PluginHalter>*) | |
{ | |
if (m_plugins.isEmpty()) | |
return; | |
Vector<HaltablePlugin*> plugins; | |
copyKeysToVector(m_plugins, plugins); | |
// Plug-ins older than this are candidates to be halted. | |
double pluginCutOffTime = WTF::currentTime() - m_pluginAllowedRunTime; | |
m_oldestStartTime = numeric_limits<double>::max(); | |
for (size_t i = 0; i < plugins.size(); ++i) { | |
double thisStartTime = m_plugins.get(plugins[i]); | |
if (thisStartTime > pluginCutOffTime) { | |
// This plug-in is too young to be halted. We find the oldest | |
// plug-in that is not old enough to be halted and use it to set | |
// the timer's next fire time. | |
if (thisStartTime < m_oldestStartTime) | |
m_oldestStartTime = thisStartTime; | |
continue; | |
} | |
if (m_client->shouldHaltPlugin(plugins[i]->node(), plugins[i]->isWindowed(), plugins[i]->pluginName())) | |
plugins[i]->halt(); | |
m_plugins.remove(plugins[i]); | |
} | |
startTimerIfNecessary(); | |
} | |
void PluginHalter::startTimerIfNecessary() | |
{ | |
if (m_timer.isActive()) | |
return; | |
if (m_plugins.isEmpty()) | |
return; | |
double nextFireInterval = static_cast<double>(m_pluginAllowedRunTime) - (currentTime() - m_oldestStartTime); | |
m_timer.startOneShot(nextFireInterval < 0 ? 0 : nextFireInterval); | |
} | |
} // namespace WebCore |