diff options
Diffstat (limited to 'include/io')
-rw-r--r-- | include/io/channel-buffer.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/io/channel-buffer.h b/include/io/channel-buffer.h new file mode 100644 index 0000000000..91a52b3373 --- /dev/null +++ b/include/io/channel-buffer.h @@ -0,0 +1,60 @@ +/* + * 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 */ + char *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__ */ |