summaryrefslogtreecommitdiffstats
path: root/c/src/exec/score/macros/rtems/score/priority.inl
blob: 7ad1fd909a9b6a7bccbac87ca44e8c4fe26426a7 (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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*  priority.inl
 *
 *  This file contains the macro implementation of all inlined routines
 *  in the Priority Handler.
 *
 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
 *  On-Line Applications Research Corporation (OAR).
 *  All rights assigned to U.S. Government, 1994.
 *
 *  This material may be reproduced by or for the U.S. Government pursuant
 *  to the copyright license under the clause at DFARS 252.227-7013.  This
 *  notice must appear in all copies of this file and its derivatives.
 *
 *  $Id$
 */

#ifndef __PRIORITY_inl
#define __PRIORITY_inl

#include <rtems/bitfield.h>

/*PAGE
 *
 *  _Priority_Handler_initialization
 *
 */

#define _Priority_Handler_initialization() \
  { \
    unsigned32 index; \
    \
    _Priority_Major_bit_map = 0; \
    for ( index=0 ; index <16 ; index++ ) \
       _Priority_Bit_map[ index ] = 0; \
  }

/*PAGE
 *
 *  _Priority_Is_valid
 *
 */

#define _Priority_Is_valid( _the_priority ) \
  (  ( (_the_priority) >= RTEMS_MINIMUM_PRIORITY ) && \
     ( (_the_priority) <= RTEMS_MAXIMUM_PRIORITY ) )

/*PAGE
 *
 *  _Priority_Major
 *
 */

#define _Priority_Major( _the_priority ) ( (_the_priority) / 16 )

/*PAGE
 *
 *  _Priority_Minor
 *
 */

#define _Priority_Minor( _the_priority ) ( (_the_priority) % 16 )

/*PAGE
 *
 *  _Priority_Add_to_bit_map
 *
 */

#define _Priority_Add_to_bit_map( _the_priority_map ) \
   { \
     *(_the_priority_map)->minor |= (_the_priority_map)->ready_minor; \
     _Priority_Major_bit_map     |= (_the_priority_map)->ready_major; \
   }

/*PAGE
 *
 *  _Priority_Remove_from_bit_map
 *
 */

#define _Priority_Remove_from_bit_map( _the_priority_map ) \
   { \
     *(_the_priority_map)->minor &= (_the_priority_map)->block_minor; \
     if ( *(_the_priority_map)->minor == 0 ) \
       _Priority_Major_bit_map &= (_the_priority_map)->block_major; \
   }

/*PAGE
 *
 *  _Priority_Get_highest
 *
 */

#define _Priority_Get_highest( _high_priority ) \
  { \
    Priority_Bit_map_control minor; \
    Priority_Bit_map_control major; \
    \
    _Bitfield_Find_first_bit( _Priority_Major_bit_map, major ); \
    _Bitfield_Find_first_bit( _Priority_Bit_map[major], minor ); \
    \
    (_high_priority) = (_CPU_Priority_Bits_index( major ) * 16) +  \
                       _CPU_Priority_Bits_index( minor ); \
  }

/*PAGE
 *
 *  _Priority_Initialize_information
 *
 */

#define _Priority_Initialize_information( \
     _the_priority_map, _new_priority ) \
  { \
    Priority_Bit_map_control _major; \
    Priority_Bit_map_control _minor; \
    Priority_Bit_map_control _mask;  \
    \
    _major = _Priority_Major( (_new_priority) ); \
    _minor = _Priority_Minor( (_new_priority) ); \
    \
    (_the_priority_map)->minor =  \
      &_Priority_Bit_map[ _CPU_Priority_Bits_index(_major) ]; \
    \
    _mask = _CPU_Priority_Mask( _major ); \
    (_the_priority_map)->ready_major = _mask; \
    (_the_priority_map)->block_major = ~_mask; \
    \
    _mask = _CPU_Priority_Mask( _minor ); \
    (_the_priority_map)->ready_minor = _mask; \
    (_the_priority_map)->block_minor = ~_mask; \
  }

/*PAGE
 *
 *  _Priority_Is_group_empty
 *
 */

#define _Priority_Is_group_empty ( _the_priority ) \
  ( (_the_priority) == 0 )
}
#endif
/* end of include file */