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/*
* Copyright 2003-2017 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 "config.h"
#include "IOThread.hxx"
#include "thread/Mutex.hxx"
#include "thread/Cond.hxx"
#include "thread/Thread.hxx"
#include "thread/Name.hxx"
#include "event/Loop.hxx"
#include <assert.h>
static struct {
Mutex mutex;
Cond cond;
EventLoop *loop;
Thread thread;
} io;
void
io_thread_run(void)
{
assert(io_thread_inside());
assert(io.loop != nullptr);
io.loop->Run();
}
static void
io_thread_func(gcc_unused void *arg)
{
SetThreadName("io");
/* lock+unlock to synchronize with io_thread_start(), to be
sure that io.thread is set */
io.mutex.lock();
io.mutex.unlock();
io_thread_run();
}
void
io_thread_init(void)
{
assert(io.loop == nullptr);
assert(!io.thread.IsDefined());
io.loop = new EventLoop();
}
void
io_thread_start()
{
assert(io.loop != nullptr);
assert(!io.thread.IsDefined());
const std::lock_guard<Mutex> protect(io.mutex);
io.thread.Start(io_thread_func, nullptr);
}
void
io_thread_quit(void)
{
assert(io.loop != nullptr);
io.loop->Break();
}
void
io_thread_deinit(void)
{
if (io.thread.IsDefined()) {
io_thread_quit();
io.thread.Join();
}
delete io.loop;
}
EventLoop &
io_thread_get() noexcept
{
assert(io.loop != nullptr);
return *io.loop;
}
bool
io_thread_inside() noexcept
{
return io.thread.IsInside();
}
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