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/*
* Copyright 2003-2019 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_INOTIFY_SOURCE_HXX
#define MPD_INOTIFY_SOURCE_HXX
#include "event/SocketMonitor.hxx"
#include "util/Compiler.h"
class FileDescriptor;
typedef void (*mpd_inotify_callback_t)(int wd, unsigned mask,
const char *name, void *ctx);
class InotifySource final : private SocketMonitor {
mpd_inotify_callback_t callback;
void *callback_ctx;
public:
/**
* Creates a new inotify source and registers it in the
* #EventLoop.
*
* Throws #std::system_error on error.
*
* @param callback a callback invoked for events received from
* the kernel
*/
InotifySource(EventLoop &_loop,
mpd_inotify_callback_t callback, void *ctx);
~InotifySource() {
Close();
}
/**
* Adds a path to the notify list.
*
* Throws #std::system_error on error.
*
* @return a watch descriptor
*/
int Add(const char *path_fs, unsigned mask);
/**
* Removes a path from the notify list.
*
* @param wd the watch descriptor returned by mpd_inotify_source_add()
*/
void Remove(unsigned wd);
private:
bool OnSocketReady(unsigned flags) noexcept override;
};
#endif
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