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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef included_clib_vec_bootstrap_h
#define included_clib_vec_bootstrap_h
/** \file
Vector bootstrap header file
*/
/* Bootstrap include so that #include <vppinfra/mem.h> can include e.g.
<vppinfra/mheap.h> which depends on <vppinfra/vec.h>. */
/** \brief vector header structure
Bookkeeping header preceding vector elements in memory.
User header information may preceed standard vec header.
If you change u32 len -> u64 len, single vectors can
exceed 2**32 elements. Clib heaps are vectors. */
typedef struct
{
u32 len; /**< Number of elements in vector (NOT its allocated length). */
u8 numa_id; /**< NUMA id */
u8 hdr_size; /**< header size divided by VEC_HEADER_ROUND */
u8 log2_align; /**< data alignment */
u8 vpad[1]; /**< pad to 8 bytes */
u8 vector_data[0]; /**< Vector data . */
} vec_header_t;
#define VEC_NUMA_UNSPECIFIED (0xFF)
#define VEC_HEADER_ROUND 8
/** \brief Find the vector header
Given the user's pointer to a vector, find the corresponding
vector header
@param v pointer to a vector
@return pointer to the vector's vector_header_t
*/
#define _vec_find(v) ((vec_header_t *) (v) - 1)
#define _vec_round_size(s) \
(((s) + sizeof (uword) - 1) &~ (sizeof (uword) - 1))
always_inline uword
vec_header_bytes (uword header_bytes)
{
return round_pow2 (header_bytes + sizeof (vec_header_t), VEC_HEADER_ROUND);
}
always_inline uword
vec_get_header_size (void *v)
{
uword header_size = _vec_find (v)->hdr_size * VEC_HEADER_ROUND;
return header_size;
}
/** \brief Find a user vector header
Finds the user header of a vector with unspecified alignment given
the user pointer to the vector.
*/
always_inline void *
vec_header (void *v)
{
return v ? v - vec_get_header_size (v) : 0;
}
/** \brief Find the end of user vector header
Finds the end of the user header of a vector with unspecified
alignment given the user pointer to the vector.
*/
always_inline void *
vec_header_end (void *v)
{
return v + vec_get_header_size (v);
}
/** \brief Number of elements in vector (lvalue-capable)
_vec_len (v) does not check for null, but can be used as an lvalue
(e.g. _vec_len (v) = 99).
*/
#define _vec_len(v) (_vec_find(v)->len)
/** \brief Number of elements in vector (rvalue-only, NULL tolerant)
vec_len (v) checks for NULL, but cannot be used as an lvalue.
If in doubt, use vec_len...
*/
#define vec_len(v) ((v) ? _vec_len(v) : 0)
u32 vec_len_not_inline (void *v);
/** \brief Vector's NUMA id (lvalue-capable)
_vec_numa(v) does not check for null, but can be used as an lvalue
(e.g. _vec_numa(v) = 1).
*/
#define _vec_numa(v) (_vec_find(v)->numa_id)
/** \brief Return vector's NUMA ID (rvalue-only, NULL tolerant)
vec_numa(v) checks for NULL, but cannot be used as an lvalue.
*/
#define vec_numa(v) ((v) ? _vec_numa(v) : 0)
/** \brief Number of data bytes in vector. */
#define vec_bytes(v) (vec_len (v) * sizeof (v[0]))
/**
* Return size of memory allocated for the vector
*
* @param v vector
* @return memory size allocated for the vector
*/
always_inline uword
vec_mem_size (void *v)
{
return v ? clib_mem_size (v - vec_get_header_size (v)) : 0;
}
/**
* Number of elements that can fit into generic vector
*
* @param v vector
* @param b extra header bytes
* @return number of elements that can fit into vector
*/
always_inline uword
_vec_max_len (void *v, uword elt_size)
{
return v ? vec_mem_size (v) / elt_size : 0;
}
#define vec_max_len(v) _vec_max_len (v, sizeof ((v)[0]))
always_inline void
_vec_set_len (void *v, uword len, uword elt_size)
{
ASSERT (v);
ASSERT (len <= vec_max_len (v));
CLIB_MEM_POISON_LEN (v, _vec_len (v) * elt_size, len * elt_size);
_vec_len (v) = len;
}
#define vec_set_len(v, l) _vec_set_len ((void *) v, l, sizeof ((v)[0]))
/** \brief Reset vector length to zero
NULL-pointer tolerant
*/
#define vec_reset_length(v) do { if (v) vec_set_len (v, 0); } while (0)
/** \brief End (last data address) of vector. */
#define vec_end(v) ((v) + vec_len (v))
/** \brief True if given pointer is within given vector. */
#define vec_is_member(v,e) ((e) >= (v) && (e) < vec_end (v))
/** \brief Get vector value at index i checking that i is in bounds. */
#define vec_elt_at_index(v,i) \
({ \
ASSERT ((i) < vec_len (v)); \
(v) + (i); \
})
/** \brief Get vector value at index i */
#define vec_elt(v,i) (vec_elt_at_index(v,i))[0]
/** \brief Vector iterator */
#define vec_foreach(var,vec) for (var = (vec); var < vec_end (vec); var++)
/** \brief Vector iterator (reverse) */
#define vec_foreach_backwards(var, vec) \
if (vec) \
for (var = vec_end (vec) - 1; var >= (vec); var--)
/** \brief Iterate over vector indices. */
#define vec_foreach_index(var,v) for ((var) = 0; (var) < vec_len (v); (var)++)
/** \brief Iterate over vector indices (reverse). */
#define vec_foreach_index_backwards(var, v) \
if (v) \
for ((var) = vec_len ((v)) - 1; (var) >= 0; (var)--)
/** \brief return the NUMA index for a vector */
always_inline uword
vec_get_numa (void *v)
{
vec_header_t *vh;
if (v == 0)
return 0;
vh = _vec_find (v);
return vh->numa_id;
}
#endif /* included_clib_vec_bootstrap_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
