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https://github.com/RGBCube/serenity
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691b6f69c5
The LOCKER() macro appears to have been added to LibThread as a userspace analog to the previous LOCKER() macro that existed in the kernel. The kernel version used the macro to inject __FILE__ and __LINE__ number into the lock acquisition for debugging. However AK::SourceLocation was used to remove the need for the macro. So the kernel version no longer exists. The LOCKER() in LibThread doesn't appear to actually need to be a macro, using the type directly works fine, and arguably is more readable as it removes an unnecessary level of indirection.
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Queue.h>
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#include <LibThread/BackgroundAction.h>
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#include <LibThread/Lock.h>
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#include <LibThread/Thread.h>
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static LibThread::Lockable<Queue<Function<void()>>>* s_all_actions;
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static LibThread::Thread* s_background_thread;
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static intptr_t background_thread_func()
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{
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while (true) {
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Function<void()> work_item;
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{
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LibThread::Locker locker(s_all_actions->lock());
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if (!s_all_actions->resource().is_empty())
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work_item = s_all_actions->resource().dequeue();
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}
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if (work_item)
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work_item();
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else
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sleep(1);
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}
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VERIFY_NOT_REACHED();
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}
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static void init()
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{
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s_all_actions = new LibThread::Lockable<Queue<Function<void()>>>();
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s_background_thread = &LibThread::Thread::construct(background_thread_func).leak_ref();
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s_background_thread->set_name("Background thread");
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s_background_thread->start();
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}
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LibThread::Lockable<Queue<Function<void()>>>& LibThread::BackgroundActionBase::all_actions()
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{
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if (s_all_actions == nullptr)
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init();
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return *s_all_actions;
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}
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LibThread::Thread& LibThread::BackgroundActionBase::background_thread()
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{
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if (s_background_thread == nullptr)
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init();
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return *s_background_thread;
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}
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