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/*
* 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.
*/
#include <AK/Queue.h>
#include <LibThread/BackgroundAction.h>
#include <LibThread/Lock.h>
#include <LibThread/Thread.h>
static LibThread::Lockable<Queue<Function<void()>>>* s_all_actions;
static LibThread::Thread* s_background_thread;
static int background_thread_func()
{
while (true) {
Function<void()> work_item;
{
LOCKER(s_all_actions->lock());
if (!s_all_actions->resource().is_empty())
work_item = s_all_actions->resource().dequeue();
}
if (work_item)
work_item();
else
sleep(1);
}
ASSERT_NOT_REACHED();
}
static void init()
{
s_all_actions = new LibThread::Lockable<Queue<Function<void()>>>();
s_background_thread = &LibThread::Thread::construct(background_thread_func).leak_ref();
s_background_thread->set_name("Background thread");
s_background_thread->start();
}
LibThread::Lockable<Queue<Function<void()>>>& LibThread::BackgroundActionBase::all_actions()
{
if (s_all_actions == nullptr)
init();
return *s_all_actions;
}
LibThread::Thread& LibThread::BackgroundActionBase::background_thread()
{
if (s_background_thread == nullptr)
init();
return *s_background_thread;
}
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