qemu/include/io/channel-null.h
Daniel P. Berrangé 87e4276449 io: add a QIOChannelNull equivalent to /dev/null
This is for code which needs a portable equivalent to a QIOChannelFile
connected to /dev/null.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2022-06-22 18:11:21 +01:00

56 lines
1.4 KiB
C

/*
* QEMU I/O channels null driver
*
* Copyright (c) 2022 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 2.1 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_FILE_H
#define QIO_CHANNEL_FILE_H
#include "io/channel.h"
#include "qom/object.h"
#define TYPE_QIO_CHANNEL_NULL "qio-channel-null"
OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelNull, QIO_CHANNEL_NULL)
/**
* QIOChannelNull:
*
* The QIOChannelNull object provides a channel implementation
* that discards all writes and returns EOF for all reads.
*/
struct QIOChannelNull {
QIOChannel parent;
bool closed;
};
/**
* qio_channel_null_new:
*
* Create a new IO channel object that discards all writes
* and returns EOF for all reads.
*
* Returns: the new channel object
*/
QIOChannelNull *
qio_channel_null_new(void);
#endif /* QIO_CHANNEL_NULL_H */