blob: 30085231ab4d3d3a5509397a079f5796bbec053a [file] [log] [blame]
/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
*
* 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 <memory>
#include <wtf/ListHashSet.h>
#include <wtf/Lock.h>
#include <wtf/Threading.h>
namespace WTF {
enum class ThreadGroupAddResult { NewlyAdded, AlreadyAdded, NotAdded };
class ThreadGroup : public std::enable_shared_from_this<ThreadGroup> {
public:
friend class Thread;
static std::shared_ptr<ThreadGroup> create()
{
return std::make_shared<ThreadGroup>();
}
WTF_EXPORT_PRIVATE ThreadGroupAddResult add(Thread&);
WTF_EXPORT_PRIVATE ThreadGroupAddResult add(const AbstractLocker&, Thread&);
WTF_EXPORT_PRIVATE ThreadGroupAddResult addCurrentThread();
const ListHashSet<Ref<Thread>>& threads(const AbstractLocker&) const { return m_threads; }
std::mutex& getLock() { return m_lock; }
WTF_EXPORT_PRIVATE ~ThreadGroup();
ThreadGroup() = default;
private:
std::weak_ptr<ThreadGroup> weakFromThis()
{
return shared_from_this();
}
// We use std::mutex since it can be used when deallocating TLS.
std::mutex m_lock;
ListHashSet<Ref<Thread>> m_threads;
};
}
using WTF::ThreadGroup;
using WTF::ThreadGroupAddResult;