palacios/include/palacios/vmm_stream.h

   1 /*
   2  * This file is part of the Palacios Virtual Machine Monitor developed
   3  * by the V3VEE Project with funding from the United States National
   4  * Science Foundation and the Department of Energy.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2010, Peter Dinda (pdinda@northwestern.edu>
  11  * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org>
  12  * All rights reserved.
  13  *
  14  * Author: Peter Dinda <pdinda@northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20
  21 #ifndef __VMM_STREAM_H__
  22 #define __VMM_STREAM_H__
  23
  24 #include <palacios/vmm.h>
  25
  26
  27 #ifdef __V3VEE__
  28
  29 #define V3_StreamOpen(path, mode)                                               \
  30     ({                                                                  \
  31         extern struct v3_stream_hooks *stream_hooks;                            \
  32         ((stream_hooks) && (stream_hooks)->stream_open) ?                               \
  33             (stream_hooks)->stream_open((path), (mode)) : NULL;         \
  34     })
  35
  36 #define V3_StreamRead(stream, b, l)                                     \
  37     ({                                                                  \
  38         extern struct v3_stream_hooks *stream_hooks;                            \
  39         ((stream_hooks) && (stream_hooks)->stream_read) ?                       \
  40             (stream_hooks)->stream_read((stream), (b), (l)) : -1;               \
  41     })
  42
  43 #define V3_StreamWrite(stream, b, l)                                    \
  44     ({                                                                  \
  45         extern struct v3_stream_hooks *stream_hooks;                            \
  46         ((stream_hooks) && (stream_hooks)->stream_write) ?                      \
  47             (stream_hooks)->stream_write((stream), (b), (l)) : -1;              \
  48     })
  49
  50
  51 #define V3_StreamClose(stream)                                          \
  52     ({                                                                  \
  53         extern struct v3_stream_hooks *stream_hooks;                            \
  54         ((stream_hooks) && (stream_hooks)->stream_close) ?                              \
  55             (stream_hooks)->stream_close((stream), (mode)) : NULL;      \
  56     })
  57
  58
  59 #endif
  60
  61 #define STREAM_OPEN_MODE_READ   (1 << 0)
  62 #define STREAM_OPEN_MODE_WRITE  (1 << 1)
  63
  64 struct v3_stream_hooks {
  65     void *(*stream_open)(const char *path, int mode);
  66     int (*stream_read)(void *stream, char *buf, int len);
  67     int (*stream_write)(void *stream, char *buf, int len);
  68     int (*stream_close)(void *stream);
  69
  70 };
  71
  72
  73 extern void V3_Init_Stream(struct v3_stream_hooks * hooks);
  74
  75 #endif