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* Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import "SharedTimer.h"
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#import <IOKit/IOMessage.h>
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#import <IOKit/pwr_mgt/IOPMLib.h>
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#import <wtf/Assertions.h>
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#import <wtf/Noncopyable.h>
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#import <wtf/PassOwnPtr.h>
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#import <wtf/UnusedParam.h>
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// On Snow Leopard and newer we'll ask IOKit to deliver notifications on a queue.
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#if !PLATFORM(IOS) && __MAC_OS_X_VERSION_MIN_REQUIRED == 1050
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#define IOKIT_WITHOUT_LIBDISPATCH 1
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static CFRunLoopTimerRef sharedTimer;
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static void (*sharedTimerFiredFunction)();
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static void timerFired(CFRunLoopTimerRef, void*);
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#if !defined(IOKIT_WITHOUT_LIBDISPATCH) && !PLATFORM(IOS) && __MAC_OS_X_VERSION_MAX_ALLOWED == 1060
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extern "C" void IONotificationPortSetDispatchQueue(IONotificationPortRef notify, dispatch_queue_t queue);
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WTF_MAKE_NONCOPYABLE(PowerObserver);
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static PassOwnPtr<PowerObserver> create()
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return adoptPtr(new PowerObserver);
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static void didReceiveSystemPowerNotification(void* context, io_service_t, uint32_t messageType, void* messageArgument);
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void didReceiveSystemPowerNotification(io_service_t, uint32_t messageType, void* messageArgument);
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void restartSharedTimer();
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io_connect_t m_powerConnection;
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IONotificationPortRef m_notificationPort;
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io_object_t m_notifierReference;
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#ifdef IOKIT_WITHOUT_LIBDISPATCH
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CFRunLoopSourceRef m_runLoopSource;
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dispatch_queue_t m_dispatchQueue;
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PowerObserver::PowerObserver()
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: m_powerConnection(0)
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, m_notificationPort(0)
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, m_notifierReference(0)
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#ifdef IOKIT_WITHOUT_LIBDISPATCH
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, m_dispatchQueue(dispatch_queue_create("com.apple.WebKit.PowerObserver", 0))
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m_powerConnection = IORegisterForSystemPower(this, &m_notificationPort, didReceiveSystemPowerNotification, &m_notifierReference);
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if (!m_powerConnection)
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#ifdef IOKIT_WITHOUT_LIBDISPATCH
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m_runLoopSource = IONotificationPortGetRunLoopSource(m_notificationPort);
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CFRunLoopAddSource(CFRunLoopGetMain(), m_runLoopSource, kCFRunLoopCommonModes);
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IONotificationPortSetDispatchQueue(m_notificationPort, m_dispatchQueue);
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PowerObserver::~PowerObserver()
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if (!m_powerConnection)
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#ifdef IOKIT_WITHOUT_LIBDISPATCH
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CFRunLoopRemoveSource(CFRunLoopGetMain(), m_runLoopSource, kCFRunLoopCommonModes);
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dispatch_release(m_dispatchQueue);
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IODeregisterForSystemPower(&m_notifierReference);
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IOServiceClose(m_powerConnection);
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IONotificationPortDestroy(m_notificationPort);
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void PowerObserver::didReceiveSystemPowerNotification(void* context, io_service_t service, uint32_t messageType, void* messageArgument)
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static_cast<PowerObserver*>(context)->didReceiveSystemPowerNotification(service, messageType, messageArgument);
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void PowerObserver::didReceiveSystemPowerNotification(io_service_t, uint32_t messageType, void* messageArgument)
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IOAllowPowerChange(m_powerConnection, reinterpret_cast<long>(messageArgument));
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// We only care about the "wake from sleep" message.
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if (messageType != kIOMessageSystemWillPowerOn)
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#ifdef IOKIT_WITHOUT_LIBDISPATCH
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restartSharedTimer();
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// We need to restart the timer on the main thread.
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CFRunLoopPerformBlock(CFRunLoopGetMain(), kCFRunLoopCommonModes, ^() {
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restartSharedTimer();
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void PowerObserver::restartSharedTimer()
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ASSERT(CFRunLoopGetCurrent() == CFRunLoopGetMain());
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static PowerObserver* PowerObserver;
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void setSharedTimerFiredFunction(void (*f)())
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ASSERT(!sharedTimerFiredFunction || sharedTimerFiredFunction == f);
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sharedTimerFiredFunction = f;
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static void timerFired(CFRunLoopTimerRef, void*)
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// FIXME: We can remove this global catch-all if we fix <rdar://problem/5299018>.
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NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
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sharedTimerFiredFunction();
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void setSharedTimerFireInterval(double interval)
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ASSERT(sharedTimerFiredFunction);
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CFRunLoopTimerInvalidate(sharedTimer);
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CFRelease(sharedTimer);
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CFAbsoluteTime fireDate = CFAbsoluteTimeGetCurrent() + interval;
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sharedTimer = CFRunLoopTimerCreate(0, fireDate, 0, 0, 0, timerFired, 0);
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CFRunLoopAddTimer(CFRunLoopGetCurrent(), sharedTimer, kCFRunLoopCommonModes);
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PowerObserver = PowerObserver::create().leakPtr();
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void stopSharedTimer()
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CFRunLoopTimerInvalidate(sharedTimer);
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CFRelease(sharedTimer);
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} // namespace WebCore