summaryrefslogtreecommitdiffstats
path: root/c/src/exec/score/inline/heap.inl
blob: b3e04a1deb267c3a787c8f4ac1ced487e8d94b12 (plain)
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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
/*  heap.inl
 *
 *  This file contains the static inline implementation of the inlined
 *  routines from the heap 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 __HEAP_inl
#define __HEAP_inl

#include <rtems/core/address.h>

/*PAGE
 *
 *  _Heap_Head
 *
 */

STATIC INLINE Heap_Block *_Heap_Head (
  Heap_Control *the_heap
)
{
  return (Heap_Block *)&the_heap->start;
}

/*PAGE
 *
 *  _Heap_Tail
 *
 */

STATIC INLINE Heap_Block *_Heap_Tail (
  Heap_Control *the_heap
)
{
  return (Heap_Block *)&the_heap->final;
}

/*PAGE
 *
 *  _Heap_Previous_block
 *
 */

STATIC INLINE Heap_Block *_Heap_Previous_block (
  Heap_Block *the_block
)
{
  return (Heap_Block *) _Addresses_Subtract_offset(
                          (void *)the_block,
                          the_block->back_flag & ~ HEAP_BLOCK_USED
                        );
}

/*PAGE
 *
 *  _Heap_Next_block
 *
 *  NOTE: Next_block assumes that the block is free.
 */

STATIC INLINE Heap_Block *_Heap_Next_block (
  Heap_Block *the_block
)
{
  return (Heap_Block *) _Addresses_Add_offset(
                          (void *)the_block,
                          the_block->front_flag & ~ HEAP_BLOCK_USED
                        );
}

/*PAGE
 *
 *  _Heap_Block_at
 *
 */

STATIC INLINE Heap_Block *_Heap_Block_at(
  void       *base,
  unsigned32  offset
)
{
  return (Heap_Block *) _Addresses_Add_offset( (void *)base, offset );
}

/*PAGE
 *
 *  _Heap_User_Block_at
 *
 */
 
STATIC INLINE Heap_Block *_Heap_User_Block_at(
  void       *base
)
{
  unsigned32         offset;
 
  offset = *(((unsigned32 *) base) - 1);
  return _Heap_Block_at( base, -offset + -HEAP_BLOCK_USED_OVERHEAD);
}

/*PAGE
 *
 *  _Heap_Is_previous_block_free
 *
 */

STATIC INLINE boolean _Heap_Is_previous_block_free (
  Heap_Block *the_block
)
{
  return !(the_block->back_flag & HEAP_BLOCK_USED);
}

/*PAGE
 *
 *  _Heap_Is_block_free
 *
 */

STATIC INLINE boolean _Heap_Is_block_free (
  Heap_Block *the_block
)
{
  return !(the_block->front_flag & HEAP_BLOCK_USED);
}

/*PAGE
 *
 *  _Heap_Is_block_used
 *
 */

STATIC INLINE boolean _Heap_Is_block_used (
  Heap_Block *the_block
)
{
  return (the_block->front_flag & HEAP_BLOCK_USED);
}

/*PAGE
 *
 *  _Heap_Block_size
 *
 */

STATIC INLINE unsigned32 _Heap_Block_size (
  Heap_Block *the_block
)
{
  return (the_block->front_flag & ~HEAP_BLOCK_USED);
}

/*PAGE
 *
 *  _Heap_Start_of_user_area
 *
 */

STATIC INLINE void *_Heap_Start_of_user_area (
  Heap_Block *the_block
)
{
  return (void *) &the_block->next;
}

/*PAGE
 *
 *  _Heap_Is_block_in
 *
 */

STATIC INLINE boolean _Heap_Is_block_in (
  Heap_Control *the_heap,
  Heap_Block   *the_block
)
{
  return _Addresses_Is_in_range( the_block, the_heap->start, the_heap->final );
}

/*PAGE
 *
 *  _Heap_Is_page_size_valid
 *
 */

STATIC INLINE boolean _Heap_Is_page_size_valid(
  unsigned32 page_size
)
{
  return ((page_size != 0) &&
         ((page_size % CPU_HEAP_ALIGNMENT) == 0));
}

/*PAGE
 *
 *  _Heap_Build_flag
 *
 */

STATIC INLINE unsigned32 _Heap_Build_flag (
  unsigned32 size,
  unsigned32 in_use_flag
)
{
  return  size | in_use_flag;
}

#endif
/* end of include file */