blob: 75a18ab3fa578d79ff8ecd243abf985b0e4c218a [file] [log] [blame]
/*
* Copyright (C) 2017 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. AND ITS CONTRIBUTORS ``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 ITS 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/CompletionHandler.h>
#include <wtf/MainThread.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace WTF {
class CallbackAggregator : public ThreadSafeRefCounted<CallbackAggregator> {
public:
static Ref<CallbackAggregator> create(CompletionHandler<void()>&& callback) { return adoptRef(*new CallbackAggregator(WTFMove(callback))); }
~CallbackAggregator()
{
ASSERT(m_wasConstructedOnMainThread == isMainThread());
if (m_callback)
m_callback();
}
private:
explicit CallbackAggregator(CompletionHandler<void()>&& callback)
: m_callback(WTFMove(callback))
#if ASSERT_ENABLED
, m_wasConstructedOnMainThread(isMainThread())
#endif
{
}
CompletionHandler<void()> m_callback;
#if ASSERT_ENABLED
bool m_wasConstructedOnMainThread;
#endif
};
} // namespace WTF
using WTF::CallbackAggregator;