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/*
* Copyright (C) 2011, 2014 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.
*/
#pragma once
#include <wtf/Function.h>
#include <wtf/Noncopyable.h>
#include <wtf/OptionSet.h>
#include <wtf/RetainPtr.h>
#include <wtf/RunLoop.h>
#include <wtf/TZoneMalloc.h>
#if USE(GLIB_EVENT_LOOP)
#include <wtf/Lock.h>
#include <wtf/glib/ActivityObserver.h>
#endif
#if USE(CF)
using PlatformRunLoopObserver = struct __CFRunLoopObserver*;
using PlatformRunLoop = struct __CFRunLoop*;
#elif USE(GLIB)
using PlatformRunLoopObserver = ActivityObserver;
using PlatformRunLoop = RefPtr<RunLoop>;
#else
using PlatformRunLoopObserver = void*;
using PlatformRunLoop = void*;
#endif
namespace WebCore {
class RunLoopObserver {
WTF_MAKE_TZONE_ALLOCATED_EXPORT(RunLoopObserver, WEBCORE_EXPORT);
WTF_MAKE_NONCOPYABLE(RunLoopObserver);
public:
using RunLoopObserverCallback = Function<void()>;
enum class WellKnownOrder : uint8_t {
GraphicsCommit,
RenderingUpdate,
ActivityStateChange,
InspectorFrameBegin,
InspectorFrameEnd,
PostRenderingUpdate,
OpportunisticTask,
DisplayRefreshMonitor,
};
using Activity = RunLoop::Activity;
enum class Type : bool { Repeating, OneShot };
RunLoopObserver(WellKnownOrder order, RunLoopObserverCallback&& callback, Type type = Type::Repeating)
: m_callback(WTFMove(callback))
, m_type(type)
#if USE(CF) || USE(GLIB)
, m_order(order)
{ }
#else
{
UNUSED_PARAM(order);
}
#endif
WEBCORE_EXPORT ~RunLoopObserver();
static constexpr OptionSet defaultActivities = { Activity::BeforeWaiting, Activity::Exit };
WEBCORE_EXPORT void schedule(PlatformRunLoop = nullptr, OptionSet<Activity> = defaultActivities);
WEBCORE_EXPORT void invalidate();
WEBCORE_EXPORT bool isScheduled() const;
bool isRepeating() const { return m_type == Type::Repeating; }
#if USE(CF)
static void runLoopObserverFired(PlatformRunLoopObserver, unsigned long, void*);
#endif
private:
void runLoopObserverFired();
RunLoopObserverCallback m_callback;
Type m_type { Type::Repeating };
#if USE(CF)
WellKnownOrder m_order { WellKnownOrder::GraphicsCommit };
RetainPtr<PlatformRunLoopObserver> m_runLoopObserver;
#elif USE(GLIB_EVENT_LOOP)
WellKnownOrder m_order { WellKnownOrder::GraphicsCommit };
mutable Lock m_runLoopObserverLock;
RefPtr<ActivityObserver> m_runLoopObserver WTF_GUARDED_BY_LOCK(m_runLoopObserverLock);
#endif
};
} // namespace WebCore
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