mirror of
https://github.com/darlinghq/darling-WTF.git
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73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
/*
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* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
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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/AutomaticThread.h>
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#include <wtf/Deque.h>
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#include <wtf/Function.h>
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#include <wtf/NumberOfCores.h>
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#include <wtf/Vector.h>
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#include <wtf/text/WTFString.h>
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namespace WTF {
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class WorkerPool : public ThreadSafeRefCounted<WorkerPool> {
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public:
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WTF_EXPORT_PRIVATE void postTask(Function<void()>&&);
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WTF_EXPORT_PRIVATE ~WorkerPool();
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// If timeout is infinity, it means AutomaticThread will be never automatically destroyed.
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static Ref<WorkerPool> create(ASCIILiteral name, unsigned numberOfWorkers = WTF::numberOfProcessorCores(), Seconds timeout = Seconds::infinity())
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{
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ASSERT(numberOfWorkers >= 1);
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return adoptRef(*new WorkerPool(name, numberOfWorkers, timeout));
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}
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ASCIILiteral name() const { return m_name; }
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private:
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class Worker;
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friend class Worker;
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WTF_EXPORT_PRIVATE WorkerPool(ASCIILiteral name, unsigned numberOfWorkers, Seconds timeout);
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bool shouldSleep(const AbstractLocker&);
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Box<Lock> m_lock;
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Ref<AutomaticThreadCondition> m_condition;
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Seconds m_timeout;
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MonotonicTime m_lastTimeoutTime { MonotonicTime::nan() };
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unsigned m_numberOfActiveWorkers { 0 };
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Vector<Ref<Worker>> m_workers;
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Deque<Function<void()>> m_tasks;
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ASCIILiteral m_name;
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};
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}
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using WTF::WorkerPool;
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