mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 14:22:43 +00:00
97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
|
|
* 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT HOLDER 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 <AK/Function.h>
|
|
#include <AK/NonnullRefPtr.h>
|
|
#include <AK/Optional.h>
|
|
#include <AK/Queue.h>
|
|
#include <LibCore/Event.h>
|
|
#include <LibCore/EventLoop.h>
|
|
#include <LibCore/Object.h>
|
|
#include <LibThread/Lock.h>
|
|
#include <LibThread/Thread.h>
|
|
|
|
namespace LibThread {
|
|
|
|
template<typename Result>
|
|
class BackgroundAction;
|
|
|
|
class BackgroundActionBase {
|
|
template<typename Result>
|
|
friend class BackgroundAction;
|
|
|
|
private:
|
|
BackgroundActionBase() { }
|
|
|
|
static Lockable<Queue<Function<void()>>>& all_actions();
|
|
static Thread& background_thread();
|
|
};
|
|
|
|
template<typename Result>
|
|
class BackgroundAction final : public Core::Object
|
|
, private BackgroundActionBase {
|
|
C_OBJECT(BackgroundAction);
|
|
|
|
public:
|
|
static NonnullRefPtr<BackgroundAction<Result>> create(
|
|
Function<Result()> action,
|
|
Function<void(Result)> on_complete = nullptr)
|
|
{
|
|
return adopt(*new BackgroundAction(move(action), move(on_complete)));
|
|
}
|
|
|
|
virtual ~BackgroundAction() { }
|
|
|
|
private:
|
|
BackgroundAction(Function<Result()> action, Function<void(Result)> on_complete)
|
|
: Core::Object(&background_thread())
|
|
, m_action(move(action))
|
|
, m_on_complete(move(on_complete))
|
|
{
|
|
LOCKER(all_actions().lock());
|
|
|
|
all_actions().resource().enqueue([this] {
|
|
m_result = m_action();
|
|
if (m_on_complete) {
|
|
Core::EventLoop::current().post_event(*this, make<Core::DeferredInvocationEvent>([this](auto&) {
|
|
m_on_complete(m_result.release_value());
|
|
this->remove_from_parent();
|
|
}));
|
|
Core::EventLoop::wake();
|
|
} else {
|
|
this->remove_from_parent();
|
|
}
|
|
});
|
|
}
|
|
|
|
Function<Result()> m_action;
|
|
Function<void(Result)> m_on_complete;
|
|
Optional<Result> m_result;
|
|
};
|
|
|
|
}
|