Palacios Public Git Repository

To checkout Palacios execute

  git clone http://v3vee.org/palacios/palacios.web/palacios.git
This will give you the master branch. You probably want the devel branch or one of the release branches. To switch to the devel branch, simply execute
  cd palacios
  git checkout --track -b devel origin/devel
The other branches are similar.


Halt handling uses global performance parameters to decide yield strategy
[palacios.git] / geekos / include / geekos / ring_buffer.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) 2008, Jack Lange <jarusl@cs.northwestern.edu> 
11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
12  * All rights reserved.
13  *
14  * Author: Jack Lange <jarusl@cs.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 #ifndef __RING_BUFFER_H__
21 #define __RING_BUFFER_H__
22
23
24 #include <geekos/ktypes.h>
25
26
27 struct ring_buffer {
28   uchar_t * buf;
29   uint_t size;
30
31   uint_t start;
32   uint_t end;
33   uint_t current_len;
34
35 };
36
37
38 void init_ring_buffer(struct ring_buffer * ring, uint_t size);
39 struct ring_buffer * create_ring_buffer(uint_t size);
40
41 void free_ring_buffer(struct ring_buffer * ring);
42
43
44 int rb_read(struct ring_buffer * ring, char * dst, uint_t len);
45 int rb_peek(struct ring_buffer * ring, char * dst, uint_t len);
46 int rb_delete(struct ring_buffer * ring, uint_t len);
47 int rb_write(struct ring_buffer * ring, char * src, uint_t len);
48 int rb_data_len(struct ring_buffer * ring);
49 int rb_capacity(struct ring_buffer * ring);
50
51
52 void print_ring_buffer(struct ring_buffer * ring);
53
54
55 #endif // ! __RING_BUFFER_H__