mpd/src/event/Thread.cxx
Max Kellermann 6c67408944 event/Loop: add flag alive
This replaces the old `dead` flag which was unreliable; it was `false`
if the EventThread was not yet started, which could cause deadlocks in
BlockingCall().
2019-02-05 22:38:45 +01:00

67 lines
1.5 KiB
C++

/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "Thread.hxx"
#include "thread/Name.hxx"
#include "thread/Slack.hxx"
#include "thread/Util.hxx"
#include "Log.hxx"
void
EventThread::Start()
{
assert(!event_loop.IsAlive());
assert(!thread.IsDefined());
event_loop.SetAlive(true);
thread.Start();
}
void
EventThread::Stop() noexcept
{
if (thread.IsDefined()) {
assert(event_loop.IsAlive());
event_loop.SetAlive(false);
event_loop.Break();
thread.Join();
}
}
void
EventThread::Run() noexcept
{
SetThreadName(realtime ? "rtio" : "io");
if (realtime) {
SetThreadTimerSlackUS(10);
try {
SetThreadRealtime();
} catch (...) {
LogError(std::current_exception(),
"RTIOThread could not get realtime scheduling, continuing anyway");
}
}
event_loop.Run();
}