mirror of
https://github.com/SerenityOS/serenity
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79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
/*
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* Copyright (c) 2021, The SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/Process.h>
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#include <Kernel/SpinLock.h>
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#include <Kernel/WaitQueue.h>
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#include <Kernel/WorkQueue.h>
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namespace Kernel {
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WorkQueue* g_io_work;
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void WorkQueue::initialize()
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{
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g_io_work = new WorkQueue("IO WorkQueue");
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}
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WorkQueue::WorkQueue(const char* name)
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{
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RefPtr<Thread> thread;
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Process::create_kernel_process(thread, name, [this] {
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for (;;) {
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WorkItem* item;
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bool have_more;
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{
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ScopedSpinLock lock(m_lock);
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item = m_items.take_first();
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have_more = !m_items.is_empty();
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}
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if (item) {
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item->function(item->data);
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if (item->free_data)
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item->free_data(item->data);
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delete item;
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if (have_more)
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continue;
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}
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[[maybe_unused]] auto result = m_wait_queue.wait_on({});
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}
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});
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// If we can't create the thread we're in trouble...
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m_thread = thread.release_nonnull();
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}
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void WorkQueue::do_queue(WorkItem* item)
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{
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{
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ScopedSpinLock lock(m_lock);
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m_items.append(*item);
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}
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m_wait_queue.wake_one();
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}
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}
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