summaryrefslogtreecommitdiffstats
path: root/c/src/exec/rtems/inline/rtems/rtems/dpmem.inl
blob: 777a886452d0f2dc94535cadeb7534c14cd7cb40 (plain) (blame)
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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
/*  inline/dpmem.inl
 *
 *  This include file contains the inline routine used in conjunction
 *  with the Dual Ported Memory Manager
 *
 *  COPYRIGHT (c) 1989-1998.
 *  On-Line Applications Research Corporation (OAR).
 *  Copyright assigned to U.S. Government, 1994.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id$
 */

#ifndef __INLINE_DPMEM_inl
#define __INLINE_DPMEM_inl


/*PAGE
 *
 *  _Dual_ported_memory_Allocate
 *
 *  DESCRIPTION:
 *
 *  This routine allocates a port control block from the inactive chain
 *  of free port control blocks.
 */

RTEMS_INLINE_ROUTINE Dual_ported_memory_Control
   *_Dual_ported_memory_Allocate ( void )
{
  return (Dual_ported_memory_Control *)
     _Objects_Allocate( &_Dual_ported_memory_Information );
}

/*PAGE
 *
 *  _Dual_ported_memory_Free
 *
 *  DESCRIPTION:
 *
 *  This routine frees a port control block to the inactive chain
 *  of free port control blocks.
 */

RTEMS_INLINE_ROUTINE void _Dual_ported_memory_Free (
   Dual_ported_memory_Control *the_port
)
{
  _Objects_Free( &_Dual_ported_memory_Information, &the_port->Object );
}

/*PAGE
 *
 *  _Dual_ported_memory_Get
 *
 *  DESCRIPTION:
 *
 *  This function maps port IDs to port control blocks.  If ID
 *  corresponds to a local port, then it returns the_port control
 *  pointer which maps to ID and location is set to OBJECTS_LOCAL.
 *  Global ports are not supported, thus if ID  does not map to a
 *  local port, location is set to OBJECTS_ERROR and the_port is
 *  undefined.
 */

RTEMS_INLINE_ROUTINE Dual_ported_memory_Control *_Dual_ported_memory_Get (
  Objects_Id         id,
  Objects_Locations *location
)
{
  return (Dual_ported_memory_Control *)
     _Objects_Get( &_Dual_ported_memory_Information, id, location );
}

/*PAGE
 *
 *  _Dual_ported_memory_Is_null
 *
 *  DESCRIPTION:
 *
 *  This function returns TRUE if the_port is NULL and FALSE otherwise.
 */

RTEMS_INLINE_ROUTINE boolean _Dual_ported_memory_Is_null(
  Dual_ported_memory_Control *the_port
)
{
  return ( the_port == NULL );
}

#endif
/* end of include file */