Machine_Project_5/frame_pool.H at master · arjunjm/Machine_Project_5 · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
/*
    File: frame_pool.H

    Author: R. Bettati
            Department of Computer Science
            Texas A&M University
    Date  : 09/03/05

    Description: Management of the Free-Frame Pool.


*/

#ifndef _FRAME_POOL_H_                   // include file only once
#define _FRAME_POOL_H_

/*--------------------------------------------------------------------------*/
/* DEFINES */
/*--------------------------------------------------------------------------*/

/* -- (none) -- */

/*--------------------------------------------------------------------------*/
/* INCLUDES */
/*--------------------------------------------------------------------------*/

/* -- (none) -- */

/*--------------------------------------------------------------------------*/
/* DATA STRUCTURES */
/*--------------------------------------------------------------------------*/

/* -- (none) -- */

/*--------------------------------------------------------------------------*/
/* F r a m e   P o o l  */
/*--------------------------------------------------------------------------*/

class FramePool {

public:

   FramePool();
   /* Initializes the data structures needed for the management of the
      free frame pool. This function must be called before the paging system
      is initialized. */

   unsigned long get_frame();
   /* Allocates a frame from the frame pool. If successful, returns the physical
      address of the frame. If fails, returns 0x0. */

   void release_frame(unsigned long _frame_address);
   /* Releases frame back to the given frame pool.
      The frame is identified by the physical address. */

};
#endif