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/*
* Copyright (c) 2021, the SerenityOS developers.
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Process.h>
#include <Kernel/Sections.h>
#include <Kernel/WaitQueue.h>
#include <Kernel/WorkQueue.h>
namespace Kernel {
WorkQueue* g_io_work;
UNMAP_AFTER_INIT void WorkQueue::initialize()
{
g_io_work = new WorkQueue("IO WorkQueue");
}
UNMAP_AFTER_INIT WorkQueue::WorkQueue(StringView name)
{
RefPtr<Thread> thread;
auto name_kstring = KString::try_create(name);
if (name_kstring.is_error())
TODO();
(void)Process::create_kernel_process(thread, name_kstring.release_value(), [this] {
for (;;) {
WorkItem* item;
bool have_more;
m_items.with([&](auto& items) {
item = items.take_first();
have_more = !items.is_empty();
});
if (item) {
item->function();
delete item;
if (have_more)
continue;
}
[[maybe_unused]] auto result = m_wait_queue.wait_on({});
}
});
// If we can't create the thread we're in trouble...
m_thread = thread.release_nonnull();
}
void WorkQueue::do_queue(WorkItem& item)
{
m_items.with([&](auto& items) {
items.append(item);
});
m_wait_queue.wake_one();
}
}
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