mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
/*
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* Copyright (C) 2012-2019 Apple Inc. All rights reserved.
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*
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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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* are met:
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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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*
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* THIS SOFTWARE IS PROVIDED BY APPLE 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 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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*/
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#pragma once
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#include <wtf/HashSet.h>
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#include <wtf/Lock.h>
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#include <wtf/RefPtr.h>
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#include <wtf/RetainPtr.h>
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#include <wtf/RunLoop.h>
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#include <wtf/SharedTask.h>
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#include <wtf/ThreadSafeRefCounted.h>
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namespace JSC {
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class JSLock;
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class VM;
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class JSRunLoopTimer : public ThreadSafeRefCounted<JSRunLoopTimer> {
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public:
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typedef void TimerNotificationType();
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using TimerNotificationCallback = RefPtr<WTF::SharedTask<TimerNotificationType>>;
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class Manager {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(Manager);
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void timerDidFireCallback();
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Manager() = default;
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void timerDidFire();
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public:
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using EpochTime = Seconds;
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static Manager& shared();
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void registerVM(VM&);
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void unregisterVM(VM&);
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void scheduleTimer(JSRunLoopTimer&, Seconds nextFireTime);
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void cancelTimer(JSRunLoopTimer&);
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Optional<Seconds> timeUntilFire(JSRunLoopTimer&);
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private:
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Lock m_lock;
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class PerVMData {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(PerVMData);
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public:
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PerVMData(Manager&, WTF::RunLoop&);
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~PerVMData();
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Ref<WTF::RunLoop> runLoop;
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std::unique_ptr<RunLoop::Timer<Manager>> timer;
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Vector<std::pair<Ref<JSRunLoopTimer>, EpochTime>> timers;
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};
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HashMap<Ref<JSLock>, std::unique_ptr<PerVMData>> m_mapping;
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};
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JSRunLoopTimer(VM&);
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JS_EXPORT_PRIVATE virtual ~JSRunLoopTimer();
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virtual void doWork(VM&) = 0;
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void setTimeUntilFire(Seconds intervalInSeconds);
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void cancelTimer();
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bool isScheduled() const { return m_isScheduled; }
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// Note: The only thing the timer notification callback cannot do is
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// call setTimeUntilFire(). This will cause a deadlock. It would not
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// be hard to make this work, however, there are no clients that need
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// this behavior. We should implement it only if we find that we need it.
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JS_EXPORT_PRIVATE void addTimerSetNotification(TimerNotificationCallback);
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JS_EXPORT_PRIVATE void removeTimerSetNotification(TimerNotificationCallback);
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JS_EXPORT_PRIVATE Optional<Seconds> timeUntilFire();
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protected:
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static constexpr Seconds s_decade { 60 * 60 * 24 * 365 * 10 };
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Ref<JSLock> m_apiLock;
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private:
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friend class Manager;
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void timerDidFire();
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HashSet<TimerNotificationCallback> m_timerSetCallbacks;
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Lock m_timerCallbacksLock;
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Lock m_lock;
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bool m_isScheduled { false };
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};
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} // namespace JSC
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