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/*
* QEMU I/O channels watch helper APIs
*
* Copyright (c) 2015 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef QIO_CHANNEL_WATCH_H__
#define QIO_CHANNEL_WATCH_H__
#include "io/channel.h"
/*
* This module provides helper functions that will be needed by
* the various QIOChannel implementations, for creating watches
* on file descriptors / sockets
*/
/**
* qio_channel_create_fd_watch:
* @ioc: the channel object
* @fd: the file descriptor
* @condition: the I/O condition
*
* Create a new main loop source that is able to
* monitor the file descriptor @fd for the
* I/O conditions in @condition. This is able
* monitor block devices, character devices,
* pipes but not plain files or, on Win32, sockets.
*
* Returns: the new main loop source
*/
GSource *qio_channel_create_fd_watch(QIOChannel *ioc,
int fd,
GIOCondition condition);
/**
* qio_channel_create_socket_watch:
* @ioc: the channel object
* @fd: the file descriptor
* @condition: the I/O condition
*
* Create a new main loop source that is able to
* monitor the file descriptor @fd for the
* I/O conditions in @condition. This is equivalent
* to qio_channel_create_fd_watch on POSIX systems
* but not on Windows.
*
* Returns: the new main loop source
*/
GSource *qio_channel_create_socket_watch(QIOChannel *ioc,
int fd,
GIOCondition condition);
/**
* qio_channel_create_fd_pair_watch:
* @ioc: the channel object
* @fdread: the file descriptor for reading
* @fdwrite: the file descriptor for writing
* @condition: the I/O condition
*
* Create a new main loop source that is able to
* monitor the pair of file descriptors @fdread
* and @fdwrite for the I/O conditions in @condition.
* This is intended for monitoring unidirectional
* file descriptors such as pipes, where a pair
* of descriptors is required for bidirectional
* I/O
*
* Returns: the new main loop source
*/
GSource *qio_channel_create_fd_pair_watch(QIOChannel *ioc,
int fdread,
int fdwrite,
GIOCondition condition);
#endif /* QIO_CHANNEL_WATCH_H__ */
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