d29d186d62
The normal I/O event thread can have a large latency, e.g. when libgnutls loads all TLS CA certificates for a https connect. This makes it unreliable for the ALSA I/O notifications, and causes ring buffer xruns. To avoid interfering with high latency events such as CURL's, we move the ALSA I/O events to a separate I/O thread which also obtains real-time scheduling (if possible). Closes #221
59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "Thread.hxx"
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#include "thread/Name.hxx"
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#include "thread/Util.hxx"
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#include "Log.hxx"
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void
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EventThread::Start()
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{
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assert(!thread.IsDefined());
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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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event_loop.Break();
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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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if (realtime) {
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try {
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SetThreadRealtime();
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} catch (...) {
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LogError(std::current_exception(),
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"RTIOThread could not get realtime scheduling, continuing anyway");
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}
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}
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event_loop.Run();
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}
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