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/*
* 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.
*/
#ifndef MPD_ALSA_NON_BLOCK_HXX
#define MPD_ALSA_NON_BLOCK_HXX
#include "util/ReusableArray.hxx"
#include <alsa/asoundlib.h>
#include <chrono>
class MultiSocketMonitor;
/**
* Helper class for #MultiSocketMonitor's virtual methods which
* manages the file descriptors for a #snd_pcm_t.
*/
class AlsaNonBlockPcm {
ReusableArray<pollfd> pfd_buffer;
public:
/**
* Throws on error.
*/
std::chrono::steady_clock::duration PrepareSockets(MultiSocketMonitor &m,
snd_pcm_t *pcm);
/**
* Wrapper for snd_pcm_poll_descriptors_revents(), to be
* called from MultiSocketMonitor::DispatchSockets().
*
* Throws on error.
*/
void DispatchSockets(MultiSocketMonitor &m, snd_pcm_t *pcm);
};
/**
* Helper class for #MultiSocketMonitor's virtual methods which
* manages the file descriptors for a #snd_mixer_t.
*/
class AlsaNonBlockMixer {
ReusableArray<pollfd> pfd_buffer;
public:
std::chrono::steady_clock::duration PrepareSockets(MultiSocketMonitor &m,
snd_mixer_t *mixer) noexcept;
/**
* Wrapper for snd_mixer_poll_descriptors_revents(), to be
* called from MultiSocketMonitor::DispatchSockets().
*/
void DispatchSockets(MultiSocketMonitor &m, snd_mixer_t *mixer) noexcept;
};
#endif