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/*
* QEMU I/O channels memory buffer driver
*
* 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_BUFFER_H
#define QIO_CHANNEL_BUFFER_H
#include "io/channel.h"
#define TYPE_QIO_CHANNEL_BUFFER "qio-channel-buffer"
#define QIO_CHANNEL_BUFFER(obj) \
OBJECT_CHECK(QIOChannelBuffer, (obj), TYPE_QIO_CHANNEL_BUFFER)
typedef struct QIOChannelBuffer QIOChannelBuffer;
/**
* QIOChannelBuffer:
*
* The QIOChannelBuffer object provides a channel implementation
* that is able to perform I/O to/from a memory buffer.
*
*/
struct QIOChannelBuffer {
QIOChannel parent;
size_t capacity; /* Total allocated memory */
size_t usage; /* Current size of data */
size_t offset; /* Offset for future I/O ops */
uint8_t *data;
};
/**
* qio_channel_buffer_new:
* @capacity: the initial buffer capacity to allocate
*
* Allocate a new buffer which is initially empty
*
* Returns: the new channel object
*/
QIOChannelBuffer *
qio_channel_buffer_new(size_t capacity);
#endif /* QIO_CHANNEL_BUFFER_H */
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