cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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channel-buffer.h (1647B)

      1/*
      2 * QEMU I/O channels memory buffer driver
      3 *
      4 * Copyright (c) 2015 Red Hat, Inc.
      5 *
      6 * This library is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License as published by the Free Software Foundation; either
      9 * version 2.1 of the License, or (at your option) any later version.
     10 *
     11 * This library is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18 *
     19 */
     20
     21#ifndef QIO_CHANNEL_BUFFER_H
     22#define QIO_CHANNEL_BUFFER_H
     23
     24#include "io/channel.h"
     25#include "qom/object.h"
     26
     27#define TYPE_QIO_CHANNEL_BUFFER "qio-channel-buffer"
     28OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelBuffer, QIO_CHANNEL_BUFFER)
     29
     30
     31/**
     32 * QIOChannelBuffer:
     33 *
     34 * The QIOChannelBuffer object provides a channel implementation
     35 * that is able to perform I/O to/from a memory buffer.
     36 *
     37 */
     38
     39struct QIOChannelBuffer {
     40    QIOChannel parent;
     41    size_t capacity; /* Total allocated memory */
     42    size_t usage;    /* Current size of data */
     43    size_t offset;   /* Offset for future I/O ops */
     44    uint8_t *data;
     45};
     46
     47
     48/**
     49 * qio_channel_buffer_new:
     50 * @capacity: the initial buffer capacity to allocate
     51 *
     52 * Allocate a new buffer which is initially empty
     53 *
     54 * Returns: the new channel object
     55 */
     56QIOChannelBuffer *
     57qio_channel_buffer_new(size_t capacity);
     58
     59#endif /* QIO_CHANNEL_BUFFER_H */