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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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,
22 distribute, sublicense, and/or sell copies of the Software, and to
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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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. */
60 u32 len; /**< Number of elements in vector (NOT its allocated length). */
61 u8 numa_id; /**< NUMA id */
62 u8 vpad[3]; /**< pad to 8 bytes */
64 u8 vector_data[0]; /**< Vector data . */
67 #define VEC_NUMA_UNSPECIFIED (0xFF)
69 /** \brief Find the vector header
71 Given the user's pointer to a vector, find the corresponding
74 @param v pointer to a vector
75 @return pointer to the vector's vector_header_t
77 #define _vec_find(v) ((vec_header_t *) (v) - 1)
79 #define _vec_round_size(s) \
80 (((s) + sizeof (uword) - 1) &~ (sizeof (uword) - 1))
83 vec_header_bytes (uword header_bytes)
85 return round_pow2 (header_bytes + sizeof (vec_header_t),
86 sizeof (vec_header_t));
89 /** \brief Find a user vector header
91 Finds the user header of a vector with unspecified alignment given
92 the user pointer to the vector.
96 vec_header (void *v, uword header_bytes)
98 return v - vec_header_bytes (header_bytes);
101 /** \brief Find the end of user vector header
103 Finds the end of the user header of a vector with unspecified
104 alignment given the user pointer to the vector.
108 vec_header_end (void *v, uword header_bytes)
110 return v + vec_header_bytes (header_bytes);
114 vec_aligned_header_bytes (uword header_bytes, uword align)
116 return round_pow2 (header_bytes + sizeof (vec_header_t), align);
120 vec_aligned_header (void *v, uword header_bytes, uword align)
122 return v - vec_aligned_header_bytes (header_bytes, align);
126 vec_aligned_header_end (void *v, uword header_bytes, uword align)
128 return v + vec_aligned_header_bytes (header_bytes, align);
132 /** \brief Number of elements in vector (lvalue-capable)
134 _vec_len (v) does not check for null, but can be used as an lvalue
135 (e.g. _vec_len (v) = 99).
138 #define _vec_len(v) (_vec_find(v)->len)
140 /** \brief Number of elements in vector (rvalue-only, NULL tolerant)
142 vec_len (v) checks for NULL, but cannot be used as an lvalue.
143 If in doubt, use vec_len...
146 #define vec_len(v) ((v) ? _vec_len(v) : 0)
148 /** \brief Vector's NUMA id (lvalue-capable)
150 _vec_numa(v) does not check for null, but can be used as an lvalue
151 (e.g. _vec_numa(v) = 1).
154 #define _vec_numa(v) (_vec_find(v)->numa_id)
156 /** \brief Return vector's NUMA ID (rvalue-only, NULL tolerant)
157 vec_numa(v) checks for NULL, but cannot be used as an lvalue.
159 #define vec_numa(v) ((v) ? _vec_numa(v) : 0)
162 /** \brief Number of data bytes in vector. */
164 #define vec_bytes(v) (vec_len (v) * sizeof (v[0]))
166 /** \brief Total number of bytes that can fit in vector with current allocation. */
168 #define vec_capacity(v,b) \
170 void * _vec_capacity_v = (void *) (v); \
171 uword _vec_capacity_b = (b); \
172 _vec_capacity_b = sizeof (vec_header_t) + _vec_round_size (_vec_capacity_b); \
173 _vec_capacity_v ? clib_mem_size (_vec_capacity_v - _vec_capacity_b) : 0; \
176 /** \brief Total number of elements that can fit into vector. */
177 #define vec_max_len(v) (vec_capacity(v,0) / sizeof (v[0]))
179 /** \brief Set vector length to a user-defined value */
180 #ifndef __COVERITY__ /* Coverity gets confused by ASSERT() */
181 #define vec_set_len(v, l) do { \
183 ASSERT((l) <= vec_max_len(v)); \
184 CLIB_MEM_POISON_LEN((void *)(v), _vec_len(v) * sizeof((v)[0]), (l) * sizeof((v)[0])); \
187 #else /* __COVERITY__ */
188 #define vec_set_len(v, l) do { \
191 #endif /* __COVERITY__ */
193 /** \brief Reset vector length to zero
194 NULL-pointer tolerant
196 #define vec_reset_length(v) do { if (v) vec_set_len (v, 0); } while (0)
198 /** \brief End (last data address) of vector. */
199 #define vec_end(v) ((v) + vec_len (v))
201 /** \brief True if given pointer is within given vector. */
202 #define vec_is_member(v,e) ((e) >= (v) && (e) < vec_end (v))
204 /** \brief Get vector value at index i checking that i is in bounds. */
205 #define vec_elt_at_index(v,i) \
207 ASSERT ((i) < vec_len (v)); \
211 /** \brief Get vector value at index i */
212 #define vec_elt(v,i) (vec_elt_at_index(v,i))[0]
214 /** \brief Vector iterator */
215 #define vec_foreach(var,vec) for (var = (vec); var < vec_end (vec); var++)
217 /** \brief Vector iterator (reverse) */
218 #define vec_foreach_backwards(var,vec) \
219 for (var = vec_end (vec) - 1; var >= (vec); var--)
221 /** \brief Iterate over vector indices. */
222 #define vec_foreach_index(var,v) for ((var) = 0; (var) < vec_len (v); (var)++)
224 /** \brief Iterate over vector indices (reverse). */
225 #define vec_foreach_index_backwards(var,v) \
226 for ((var) = vec_len((v)) - 1; (var) >= 0; (var)--)
228 /** \brief return the NUMA index for a vector */
230 vec_get_numa (void *v)
239 #endif /* included_clib_vec_bootstrap_h */
242 * fd.io coding-style-patch-verification: ON
245 * eval: (c-set-style "gnu")