2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
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7 * http://www.apache.org/licenses/LICENSE-2.0
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12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
18 Permission is hereby granted, free of charge, to any person obtaining
19 a copy of this software and associated documentation files (the
20 "Software"), to deal in the Software without restriction, including
21 without limitation the rights to use, copy, modify, merge, publish,
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23 permit persons to whom the Software is furnished to do so, subject to
24 the following conditions:
26 The above copyright notice and this permission notice shall be
27 included in all copies or substantial portions of the Software.
29 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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35 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 #ifndef included_clib_vec_bootstrap_h
39 #define included_clib_vec_bootstrap_h
42 Vector bootstrap header file
45 /* Bootstrap include so that #include <vppinfra/mem.h> can include e.g.
46 <vppinfra/mheap.h> which depends on <vppinfra/vec.h>. */
48 /** \brief vector header structure
50 Bookkeeping header preceding vector elements in memory.
51 User header information may preceed standard vec header.
52 If you change u32 len -> u64 len, single vectors can
53 exceed 2**32 elements. Clib heaps are vectors. */
57 u32 len; /**< Number of elements in vector (NOT its allocated length). */
58 u8 hdr_size; /**< header size divided by VEC_HEADER_ROUND */
59 u8 log2_align; /**< data alignment */
60 u8 vpad[2]; /**< pad to 8 bytes */
61 u8 vector_data[0]; /**< Vector data . */
64 #define VEC_HEADER_ROUND 8
66 /** \brief Find the vector header
68 Given the user's pointer to a vector, find the corresponding
71 @param v pointer to a vector
72 @return pointer to the vector's vector_header_t
74 #define _vec_find(v) ((vec_header_t *) (v) - 1)
76 #define _vec_round_size(s) \
77 (((s) + sizeof (uword) - 1) &~ (sizeof (uword) - 1))
80 vec_header_bytes (uword header_bytes)
82 return round_pow2 (header_bytes + sizeof (vec_header_t), VEC_HEADER_ROUND);
86 vec_get_header_size (void *v)
88 uword header_size = _vec_find (v)->hdr_size * VEC_HEADER_ROUND;
92 /** \brief Find a user vector header
94 Finds the user header of a vector with unspecified alignment given
95 the user pointer to the vector.
101 return v ? v - vec_get_header_size (v) : 0;
104 /** \brief Find the end of user vector header
106 Finds the end of the user header of a vector with unspecified
107 alignment given the user pointer to the vector.
111 vec_header_end (void *v)
113 return v + vec_get_header_size (v);
116 /** \brief Number of elements in vector (lvalue-capable)
118 _vec_len (v) does not check for null, but can be used as an lvalue
119 (e.g. _vec_len (v) = 99).
122 #define _vec_len(v) (_vec_find(v)->len)
124 /** \brief Number of elements in vector (rvalue-only, NULL tolerant)
126 vec_len (v) checks for NULL, but cannot be used as an lvalue.
127 If in doubt, use vec_len...
130 #define vec_len(v) ((v) ? _vec_len(v) : 0)
131 u32 vec_len_not_inline (void *v);
133 /** \brief Number of data bytes in vector. */
135 #define vec_bytes(v) (vec_len (v) * sizeof (v[0]))
138 * Return size of memory allocated for the vector
141 * @return memory size allocated for the vector
145 vec_mem_size (void *v)
147 return v ? clib_mem_size (v - vec_get_header_size (v)) : 0;
151 * Number of elements that can fit into generic vector
154 * @param b extra header bytes
155 * @return number of elements that can fit into vector
159 _vec_max_len (void *v, uword elt_size)
161 return v ? vec_mem_size (v) / elt_size : 0;
164 #define vec_max_len(v) _vec_max_len (v, sizeof ((v)[0]))
167 _vec_set_len (void *v, uword len, uword elt_size)
170 ASSERT (len <= vec_max_len (v));
172 CLIB_MEM_POISON_LEN (v, _vec_len (v) * elt_size, len * elt_size);
176 #define vec_set_len(v, l) _vec_set_len ((void *) v, l, sizeof ((v)[0]))
178 /** \brief Reset vector length to zero
179 NULL-pointer tolerant
181 #define vec_reset_length(v) do { if (v) vec_set_len (v, 0); } while (0)
183 /** \brief End (last data address) of vector. */
184 #define vec_end(v) ((v) + vec_len (v))
186 /** \brief True if given pointer is within given vector. */
187 #define vec_is_member(v,e) ((e) >= (v) && (e) < vec_end (v))
189 /** \brief Get vector value at index i checking that i is in bounds. */
190 #define vec_elt_at_index(v,i) \
192 ASSERT ((i) < vec_len (v)); \
196 /** \brief Get vector value at index i */
197 #define vec_elt(v,i) (vec_elt_at_index(v,i))[0]
199 /** \brief Vector iterator */
200 #define vec_foreach(var,vec) for (var = (vec); var < vec_end (vec); var++)
202 /** \brief Vector iterator (reverse) */
203 #define vec_foreach_backwards(var, vec) \
205 for (var = vec_end (vec) - 1; var >= (vec); var--)
207 /** \brief Iterate over vector indices. */
208 #define vec_foreach_index(var,v) for ((var) = 0; (var) < vec_len (v); (var)++)
210 /** \brief Iterate over vector indices (reverse). */
211 #define vec_foreach_index_backwards(var, v) \
213 for ((var) = vec_len ((v)) - 1; (var) >= 0; (var)--)
215 #endif /* included_clib_vec_bootstrap_h */
218 * fd.io coding-style-patch-verification: ON
221 * eval: (c-set-style "gnu")