HangDetectionDisablerMac.mm [plain text]
/*
* Copyright (C) 2015 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. 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
* 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 "HangDetectionDisabler.h"
#if PLATFORM(MAC)
#include <pal/spi/cg/CoreGraphicsSPI.h>
#include <wtf/RetainPtr.h>
namespace WebKit {
static const auto clientsMayIgnoreEventsKey = CFSTR("ClientMayIgnoreEvents");
static bool clientsMayIgnoreEvents()
{
CFTypeRef valuePtr;
if (CGSCopyConnectionProperty(CGSMainConnectionID(), CGSMainConnectionID(), clientsMayIgnoreEventsKey, &valuePtr) != kCGErrorSuccess)
return false;
return adoptCF(valuePtr) == kCFBooleanTrue;
}
static void setClientsMayIgnoreEvents(bool clientsMayIgnoreEvents)
{
if (CGSSetConnectionProperty(CGSMainConnectionID(), CGSMainConnectionID(), clientsMayIgnoreEventsKey, clientsMayIgnoreEvents ? kCFBooleanTrue : kCFBooleanFalse) != kCGErrorSuccess)
ASSERT_NOT_REACHED();
}
HangDetectionDisabler::HangDetectionDisabler()
: m_clientsMayIgnoreEvents(clientsMayIgnoreEvents())
{
setClientsMayIgnoreEvents(true);
}
HangDetectionDisabler::~HangDetectionDisabler()
{
setClientsMayIgnoreEvents(m_clientsMayIgnoreEvents);
}
}
#endif