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93 lines
1.8 KiB
C++
93 lines
1.8 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "Thread.hxx"
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#include "thread/Name.hxx"
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#include "thread/Slack.hxx"
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#include "thread/Util.hxx"
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#include "lib/fmt/ExceptionFormatter.hxx"
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#include "system/Error.hxx"
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#include "util/Domain.hxx"
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#include "Log.hxx"
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#ifdef HAVE_URING
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#include "util/ScopeExit.hxx"
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#include <liburing.h>
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#endif
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static constexpr Domain event_domain("event");
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void
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EventThread::Start()
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{
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assert(!event_loop.IsAlive());
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assert(!thread.IsDefined());
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event_loop.SetAlive(true);
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thread.Start();
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}
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void
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EventThread::Stop() noexcept
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{
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if (thread.IsDefined()) {
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assert(event_loop.IsAlive());
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event_loop.SetAlive(false);
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event_loop.InjectBreak();
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thread.Join();
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}
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}
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void
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EventThread::Run() noexcept
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{
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SetThreadName(realtime ? "rtio" : "io");
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event_loop.SetThread(ThreadId::GetCurrent());
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if (realtime) {
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SetThreadTimerSlack(std::chrono::microseconds(10));
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try {
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SetThreadRealtime();
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} catch (...) {
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FmtInfo(event_domain,
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"RTIOThread could not get realtime scheduling, continuing anyway: {}",
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std::current_exception());
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}
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} else {
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#ifdef HAVE_URING
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try {
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try {
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event_loop.EnableUring(1024, IORING_SETUP_SINGLE_ISSUER);
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} catch (const std::system_error &e) {
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if (IsErrno(e, EINVAL))
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/* try without IORING_SETUP_SINGLE_ISSUER
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(that flag requires Linux kernel 6.0) */
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event_loop.EnableUring(1024, 0);
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else
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throw;
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}
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} catch (...) {
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FmtInfo(event_domain,
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"Failed to initialize io_uring: {}",
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std::current_exception());
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}
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#endif
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}
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#ifdef HAVE_URING
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AtScopeExit(this) {
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/* make sure that the Uring::Manager gets destructed
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from within the EventThread, or else its
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destruction in another thread will cause assertion
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failures */
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event_loop.DisableUring();
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};
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#endif
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event_loop.Run();
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}
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