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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Locking/SpinLock.h>
#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(const char* name)
{
RefPtr<Thread> thread;
Process::create_kernel_process(thread, name, [this] {
for (;;) {
WorkItem* item;
bool have_more;
{
ScopedSpinLock lock(m_lock);
item = m_items.take_first();
have_more = !m_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)
{
{
ScopedSpinLock lock(m_lock);
m_items.append(*item);
}
m_wait_queue.wake_one();
}
}
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