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
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35 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 #ifndef included_vec_h
39 #define included_vec_h
41 #include <vppinfra/clib.h> /* word, etc */
42 #include <vppinfra/mem.h> /* clib_mem_free */
43 #include <vppinfra/string.h> /* memcpy, memmove */
44 #include <vppinfra/vec_bootstrap.h>
48 CLIB vectors are ubiquitous dynamically resized arrays with by user
49 defined "headers". Many CLIB data structures (e.g. hash, heap,
50 pool) are vectors with various different headers.
52 The memory layout looks like this:
55 user header (aligned to uword boundary)
56 vector length: number of elements
57 user's pointer-> vector element #0
62 The user pointer contains the address of vector element # 0. Null
63 pointer vectors are valid and mean a zero length vector.
65 You can reset the length of an allocated vector to zero via the
66 vec_reset_length(v) macro, or by setting the vector length field to
67 zero (e.g. _vec_len (v) = 0). Vec_reset_length(v) preferred: it
68 understands Null pointers.
70 Typically, the header is not present. Headers allow for other
71 data structures to be built atop CLIB vectors.
73 Users may specify the alignment for first data element of a vector
74 via the vec_*_aligned macros.
76 Vector elements can be any C type e.g. (int, double, struct bar).
77 This is also true for data types built atop vectors (e.g. heap,
80 Many macros have \_a variants supporting alignment of vector elements
81 and \_h variants supporting non-zero-length vector headers. The \_ha
82 variants support both. Additionally cacheline alignment within a
83 vector element structure can be specified using the
84 CLIB_CACHE_LINE_ALIGN_MARK() macro.
86 Standard programming error: memorize a pointer to the ith element
87 of a vector then expand it. Vectors expand by 3/2, so such code
88 may appear to work for a period of time. Memorize vector indices
92 /** \brief Low-level resize allocation function, usually not called directly
94 @param v pointer to a vector
95 @param length_increment length increment in elements
96 @param data_bytes requested size in bytes
97 @param header_bytes header size in bytes (may be zero)
98 @param data_align alignment (may be zero)
99 @param numa_id numa id (may be zero)
100 @return v_prime pointer to resized vector, may or may not equal v
102 void *vec_resize_allocate_memory (void *v,
103 word length_increment,
105 uword header_bytes, uword data_align,
108 /** \brief Low-level vector resize function, usually not called directly
110 @param v pointer to a vector
111 @param length_increment length increment in elements
112 @param data_bytes requested size in bytes
113 @param header_bytes header size in bytes (may be zero)
114 @param data_align alignment (may be zero)
115 @param numa_id (may be ~0)
116 @return v_prime pointer to resized vector, may or may not equal v
119 #define _vec_resize_numa(V,L,DB,HB,A,S) \
121 __typeof__ ((V)) _V; \
122 _V = _vec_resize_inline((void *)V,L,DB,HB,clib_max((__alignof__((V)[0])),(A)),(S)); \
126 #define _vec_resize(V,L,DB,HB,A) \
127 _vec_resize_numa(V,L,DB,HB,A,VEC_NUMA_UNSPECIFIED)
130 _vec_resize_inline (void *v,
131 word length_increment,
132 uword data_bytes, uword header_bytes, uword data_align,
135 vec_header_t *vh = _vec_find (v);
136 uword new_data_bytes, aligned_header_bytes;
139 aligned_header_bytes = vec_header_bytes (header_bytes);
141 new_data_bytes = data_bytes + aligned_header_bytes;
143 if (PREDICT_TRUE (v != 0))
145 void *p = v - aligned_header_bytes;
147 if (PREDICT_FALSE (numa_id != VEC_NUMA_UNSPECIFIED))
149 oldheap = clib_mem_get_per_cpu_heap ();
150 clib_mem_set_per_cpu_heap (clib_mem_get_per_numa_heap (numa_id));
153 /* Vector header must start heap object. */
154 ASSERT (clib_mem_is_heap_object (p));
156 /* Typically we'll not need to resize. */
157 if (new_data_bytes <= clib_mem_size (p))
159 CLIB_MEM_UNPOISON (v, data_bytes);
160 vh->len += length_increment;
161 if (PREDICT_FALSE (numa_id != VEC_NUMA_UNSPECIFIED))
162 clib_mem_set_per_cpu_heap (oldheap);
165 if (PREDICT_FALSE (numa_id != VEC_NUMA_UNSPECIFIED))
166 clib_mem_set_per_cpu_heap (oldheap);
169 /* Slow path: call helper function. */
170 return vec_resize_allocate_memory (v, length_increment, data_bytes,
172 clib_max (sizeof (vec_header_t),
173 data_align), numa_id);
176 /** \brief Determine if vector will resize with next allocation
178 @param v pointer to a vector
179 @param length_increment length increment in elements
180 @param data_bytes requested size in bytes
181 @param header_bytes header size in bytes (may be zero)
182 @param data_align alignment (may be zero)
183 @return 1 if vector will resize 0 otherwise
187 _vec_resize_will_expand (void *v,
188 word length_increment,
189 uword data_bytes, uword header_bytes,
192 uword new_data_bytes, aligned_header_bytes;
194 aligned_header_bytes = vec_header_bytes (header_bytes);
196 new_data_bytes = data_bytes + aligned_header_bytes;
198 if (PREDICT_TRUE (v != 0))
200 void *p = v - aligned_header_bytes;
202 /* Vector header must start heap object. */
203 ASSERT (clib_mem_is_heap_object (p));
205 /* Typically we'll not need to resize. */
206 if (new_data_bytes <= clib_mem_size (p))
212 /** \brief Determine if vector will resize with next allocation
214 @param V pointer to a vector
215 @param N number of elements to add
216 @return 1 if vector will resize 0 otherwise
219 #define vec_resize_will_expand(V, N) \
222 word _v (l) = vec_len (V); \
223 _vec_resize_will_expand ((V), _v (n), \
224 (_v (l) + _v (n)) * sizeof ((V)[0]), 0, 0); \
227 /** \brief Predicate function, says whether the supplied vector is a clib heap
228 object (general version).
230 @param v pointer to a vector
231 @param header_bytes vector header size in bytes (may be zero)
234 uword clib_mem_is_vec_h (void *v, uword header_bytes);
237 /** \brief Predicate function, says whether the supplied vector is a clib heap
240 @param v pointer to a vector
244 clib_mem_is_vec (void *v)
246 return clib_mem_is_vec_h (v, 0);
249 /* Local variable naming macro (prevents collisions with other macro naming). */
250 #define _v(var) _vec_##var
252 /** \brief Resize a vector (general version).
253 Add N elements to end of given vector V, return pointer to start of vector.
254 Vector will have room for H header bytes and will have user's data aligned
255 at alignment A (rounded to next power of 2).
257 @param V pointer to a vector
258 @param N number of elements to add
259 @param H header size in bytes (may be zero)
260 @param A alignment (may be zero)
261 @param S numa_id (may be zero)
262 @return V (value-result macro parameter)
265 #define vec_resize_has(V,N,H,A,S) \
268 word _v(l) = vec_len (V); \
269 V = _vec_resize_numa ((V), _v(n), \
270 (_v(l) + _v(n)) * sizeof ((V)[0]), \
274 /** \brief Resize a vector (less general version).
275 Add N elements to end of given vector V, return pointer to start of vector.
276 Vector will have room for H header bytes and will have user's data aligned
277 at alignment A (rounded to next power of 2).
279 @param V pointer to a vector
280 @param N number of elements to add
281 @param H header size in bytes (may be zero)
282 @param A alignment (may be zero)
283 @return V (value-result macro parameter)
285 #define vec_resize_ha(V,N,H,A) vec_resize_has(V,N,H,A,VEC_NUMA_UNSPECIFIED)
287 /** \brief Resize a vector (no header, unspecified alignment)
288 Add N elements to end of given vector V, return pointer to start of vector.
289 Vector will have room for H header bytes and will have user's data aligned
290 at alignment A (rounded to next power of 2).
292 @param V pointer to a vector
293 @param N number of elements to add
294 @return V (value-result macro parameter)
296 #define vec_resize(V,N) vec_resize_ha(V,N,0,0)
298 /** \brief Resize a vector (no header, alignment specified).
299 Add N elements to end of given vector V, return pointer to start of vector.
300 Vector will have room for H header bytes and will have user's data aligned
301 at alignment A (rounded to next power of 2).
303 @param V pointer to a vector
304 @param N number of elements to add
305 @param A alignment (may be zero)
306 @return V (value-result macro parameter)
309 #define vec_resize_aligned(V,N,A) vec_resize_ha(V,N,0,A)
311 /** \brief Allocate space for N more elements
313 @param V pointer to a vector
314 @param N number of elements to add
315 @param H header size in bytes (may be zero)
316 @param A alignment (may be zero)
317 @return V (value-result macro parameter)
320 #define vec_alloc_ha(V,N,H,A) \
322 uword _v(l) = vec_len (V); \
323 vec_resize_ha (V, N, H, A); \
324 _vec_len (V) = _v(l); \
327 /** \brief Allocate space for N more elements
328 (no header, unspecified alignment)
330 @param V pointer to a vector
331 @param N number of elements to add
332 @return V (value-result macro parameter)
334 #define vec_alloc(V,N) vec_alloc_ha(V,N,0,0)
336 /** \brief Allocate space for N more elements (no header, given alignment)
337 @param V pointer to a vector
338 @param N number of elements to add
339 @param A alignment (may be zero)
340 @return V (value-result macro parameter)
343 #define vec_alloc_aligned(V,N,A) vec_alloc_ha(V,N,0,A)
345 /** \brief Create new vector of given type and length (general version).
346 @param T type of elements in new vector
347 @param N number of elements to add
348 @param H header size in bytes (may be zero)
349 @param A alignment (may be zero)
352 #define vec_new_ha(T,N,H,A) \
355 (T *)_vec_resize ((T *) 0, _v(n), _v(n) * sizeof (T), (H), (A)); \
358 /** \brief Create new vector of given type and length
359 (unspecified alignment, no header).
361 @param T type of elements in new vector
362 @param N number of elements to add
365 #define vec_new(T,N) vec_new_ha(T,N,0,0)
366 /** \brief Create new vector of given type and length
367 (alignment specified, no header).
369 @param T type of elements in new vector
370 @param N number of elements to add
371 @param A alignment (may be zero)
374 #define vec_new_aligned(T,N,A) vec_new_ha(T,N,0,A)
376 /** \brief Free vector's memory (general version)
378 @param V pointer to a vector
379 @param H size of header in bytes
380 @return V (value-result parameter, V=0)
382 #define vec_free_h(V, H) \
387 clib_mem_free (vec_header ((V))); \
393 /** \brief Free vector's memory (no header).
394 @param V pointer to a vector
395 @return V (value-result parameter, V=0)
397 #define vec_free(V) vec_free_h(V,0)
399 void vec_free_not_inline (void *v);
401 /**\brief Free vector user header (syntactic sugar)
402 @param h vector header
405 #define vec_free_header(h) clib_mem_free (h)
407 /** \brief Return copy of vector (general version).
409 @param V pointer to a vector
410 @param H size of header in bytes
411 @param A alignment (may be zero)
412 @param S numa (may be VEC_NUMA_UNSPECIFIED)
414 @return Vdup copy of vector
417 #define vec_dup_ha_numa(V,H,A,S) \
419 __typeof__ ((V)[0]) * _v(v) = 0; \
420 uword _v(l) = vec_len (V); \
423 vec_resize_has (_v(v), _v(l), (H), (A), (S)); \
424 clib_memcpy_fast (_v(v), (V), _v(l) * sizeof ((V)[0]));\
429 /** \brief Return copy of vector (VEC_NUMA_UNSPECIFIED).
431 @param V pointer to a vector
432 @param H size of header in bytes
433 @param A alignment (may be zero)
435 @return Vdup copy of vector
437 #define vec_dup_ha(V,H,A) \
438 vec_dup_ha_numa(V,H,A,VEC_NUMA_UNSPECIFIED)
441 /** \brief Return copy of vector (no header, no alignment)
443 @param V pointer to a vector
444 @return Vdup copy of vector
446 #define vec_dup(V) vec_dup_ha(V,0,0)
448 /** \brief Return copy of vector (no header, alignment specified).
450 @param V pointer to a vector
451 @param A alignment (may be zero)
453 @return Vdup copy of vector
455 #define vec_dup_aligned(V,A) vec_dup_ha(V,0,A)
457 /** \brief Copy a vector, memcpy wrapper. Assumes sizeof(SRC[0]) ==
460 @param DST destination
463 #define vec_copy(DST,SRC) clib_memcpy_fast (DST, SRC, vec_len (DST) * \
466 /** \brief Clone a vector. Make a new vector with the
467 same size as a given vector but possibly with a different type.
469 @param NEW_V pointer to new vector
470 @param OLD_V pointer to old vector
472 #define vec_clone(NEW_V,OLD_V) \
475 (NEW_V) = _vec_resize ((NEW_V), vec_len (OLD_V), \
476 vec_len (OLD_V) * sizeof ((NEW_V)[0]), (0), (0)); \
479 /** \brief Make sure vector is long enough for given index (general version).
481 @param V (possibly NULL) pointer to a vector.
482 @param I vector index which will be valid upon return
483 @param H header size in bytes (may be zero)
484 @param A alignment (may be zero)
485 @param N numa_id (may be zero)
486 @return V (value-result macro parameter)
489 #define vec_validate_han(V,I,H,A,N) \
492 STATIC_ASSERT(A==0 || ((A % sizeof(V[0]))==0) \
493 || ((sizeof(V[0]) % A) == 0), \
494 "vector validate aligned on incorrectly sized object"); \
496 word _v(l) = vec_len (V); \
497 if (_v(i) >= _v(l)) \
499 /* switch to the per-numa heap if directed */ \
500 if (PREDICT_FALSE(N != VEC_NUMA_UNSPECIFIED)) \
502 oldheap = clib_mem_get_per_cpu_heap(); \
503 clib_mem_set_per_cpu_heap (clib_mem_get_per_numa_heap(N)); \
506 vec_resize_ha ((V), 1 + (_v(i) - _v(l)), (H), (A)); \
507 /* Must zero new space since user may have previously \
508 used e.g. _vec_len (v) -= 10 */ \
509 clib_memset ((V) + _v(l), 0, \
510 (1 + (_v(i) - _v(l))) * sizeof ((V)[0])); \
511 /* Switch back to the global heap */ \
512 if (PREDICT_FALSE (N != VEC_NUMA_UNSPECIFIED)) \
513 clib_mem_set_per_cpu_heap (oldheap); \
517 #define vec_validate_ha(V,I,H,A) vec_validate_han(V,I,H,A,VEC_NUMA_UNSPECIFIED)
519 /** \brief Make sure vector is long enough for given index
520 (no header, unspecified alignment)
522 @param V (possibly NULL) pointer to a vector.
523 @param I vector index which will be valid upon return
524 @return V (value-result macro parameter)
526 #define vec_validate(V,I) vec_validate_ha(V,I,0,0)
528 /** \brief Make sure vector is long enough for given index
529 (no header, specified alignment)
531 @param V (possibly NULL) pointer to a vector.
532 @param I vector index which will be valid upon return
533 @param A alignment (may be zero)
534 @return V (value-result macro parameter)
537 #define vec_validate_aligned(V,I,A) vec_validate_ha(V,I,0,A)
539 /** \brief Make sure vector is long enough for given index
540 and initialize empty space (general version)
542 @param V (possibly NULL) pointer to a vector.
543 @param I vector index which will be valid upon return
544 @param INIT initial value (can be a complex expression!)
545 @param H header size in bytes (may be zero)
546 @param A alignment (may be zero)
547 @return V (value-result macro parameter)
549 #define vec_validate_init_empty_ha(V,I,INIT,H,A) \
552 word _v(l) = vec_len (V); \
553 if (_v(i) >= _v(l)) \
555 vec_resize_ha ((V), 1 + (_v(i) - _v(l)), (H), (A)); \
556 while (_v(l) <= _v(i)) \
558 (V)[_v(l)] = (INIT); \
564 /** \brief Make sure vector is long enough for given index
565 and initialize empty space (no header, unspecified alignment)
567 @param V (possibly NULL) pointer to a vector.
568 @param I vector index which will be valid upon return
569 @param INIT initial value (can be a complex expression!)
570 @return V (value-result macro parameter)
573 #define vec_validate_init_empty(V,I,INIT) \
574 vec_validate_init_empty_ha(V,I,INIT,0,0)
576 /** \brief Make sure vector is long enough for given index
577 and initialize empty space (no header, alignment alignment)
579 @param V (possibly NULL) pointer to a vector.
580 @param I vector index which will be valid upon return
581 @param INIT initial value (can be a complex expression!)
582 @param A alignment (may be zero)
583 @return V (value-result macro parameter)
585 #define vec_validate_init_empty_aligned(V,I,INIT,A) \
586 vec_validate_init_empty_ha(V,I,INIT,0,A)
588 /** \brief Add 1 element to end of vector (general version).
590 @param V pointer to a vector
591 @param E element to add
592 @param H header size in bytes (may be zero)
593 @param A alignment (may be zero)
594 @return V (value-result macro parameter)
596 #define vec_add1_ha(V,E,H,A) \
598 word _v(l) = vec_len (V); \
599 V = _vec_resize ((V), 1, (_v(l) + 1) * sizeof ((V)[0]), (H), (A)); \
603 /** \brief Add 1 element to end of vector (unspecified alignment).
605 @param V pointer to a vector
606 @param E element to add
607 @return V (value-result macro parameter)
609 #define vec_add1(V,E) vec_add1_ha(V,E,0,0)
611 /** \brief Add 1 element to end of vector (alignment specified).
613 @param V pointer to a vector
614 @param E element to add
615 @param A alignment (may be zero)
616 @return V (value-result macro parameter)
618 #define vec_add1_aligned(V,E,A) vec_add1_ha(V,E,0,A)
620 /** \brief Add N elements to end of vector V,
621 return pointer to new elements in P. (general version)
623 @param V pointer to a vector
624 @param P pointer to new vector element(s)
625 @param N number of elements to add
626 @param H header size in bytes (may be zero)
627 @param A alignment (may be zero)
628 @return V and P (value-result macro parameters)
630 #define vec_add2_ha(V,P,N,H,A) \
633 word _v(l) = vec_len (V); \
634 V = _vec_resize ((V), _v(n), (_v(l) + _v(n)) * sizeof ((V)[0]), (H), (A)); \
638 /** \brief Add N elements to end of vector V,
639 return pointer to new elements in P. (no header, unspecified alignment)
641 @param V pointer to a vector
642 @param P pointer to new vector element(s)
643 @param N number of elements to add
644 @return V and P (value-result macro parameters)
647 #define vec_add2(V,P,N) vec_add2_ha(V,P,N,0,0)
649 /** \brief Add N elements to end of vector V,
650 return pointer to new elements in P. (no header, alignment specified)
652 @param V pointer to a vector
653 @param P pointer to new vector element(s)
654 @param N number of elements to add
655 @param A alignment (may be zero)
656 @return V and P (value-result macro parameters)
659 #define vec_add2_aligned(V,P,N,A) vec_add2_ha(V,P,N,0,A)
661 /** \brief Add N elements to end of vector V (general version)
663 @param V pointer to a vector
664 @param E pointer to element(s) to add
665 @param N number of elements to add
666 @param H header size in bytes (may be zero)
667 @param A alignment (may be zero)
668 @return V (value-result macro parameter)
670 #define vec_add_ha(V, E, N, H, A) \
674 if (PREDICT_TRUE (_v (n) > 0)) \
676 word _v (l) = vec_len (V); \
677 V = _vec_resize ((V), _v (n), (_v (l) + _v (n)) * sizeof ((V)[0]), \
679 clib_memcpy_fast ((V) + _v (l), (E), _v (n) * sizeof ((V)[0])); \
684 /** \brief Add N elements to end of vector V (no header, unspecified alignment)
686 @param V pointer to a vector
687 @param E pointer to element(s) to add
688 @param N number of elements to add
689 @return V (value-result macro parameter)
691 #define vec_add(V,E,N) vec_add_ha(V,E,N,0,0)
693 /** \brief Add N elements to end of vector V (no header, specified alignment)
695 @param V pointer to a vector
696 @param E pointer to element(s) to add
697 @param N number of elements to add
698 @param A alignment (may be zero)
699 @return V (value-result macro parameter)
701 #define vec_add_aligned(V,E,N,A) vec_add_ha(V,E,N,0,A)
703 /** \brief Returns last element of a vector and decrements its length
705 @param V pointer to a vector
706 @return E element removed from the end of the vector
710 uword _v(l) = vec_len (V); \
711 ASSERT (_v(l) > 0); \
713 _vec_len (V) = _v (l); \
717 /** \brief Set E to the last element of a vector, decrement vector length
718 @param V pointer to a vector
719 @param E pointer to the last vector element
720 @return E element removed from the end of the vector
721 (value-result macro parameter
724 #define vec_pop2(V,E) \
726 uword _v(l) = vec_len (V); \
727 if (_v(l) > 0) (E) = vec_pop (V); \
731 /** \brief Insert N vector elements starting at element M,
732 initialize new elements (general version).
734 @param V (possibly NULL) pointer to a vector.
735 @param N number of elements to insert
736 @param M insertion point
737 @param INIT initial value (can be a complex expression!)
738 @param H header size in bytes (may be zero)
739 @param A alignment (may be zero)
740 @return V (value-result macro parameter)
742 #define vec_insert_init_empty_ha(V,N,M,INIT,H,A) \
744 word _v(l) = vec_len (V); \
747 V = _vec_resize ((V), \
749 (_v(l) + _v(n))*sizeof((V)[0]), \
751 ASSERT (_v(m) <= _v(l)); \
752 memmove ((V) + _v(m) + _v(n), \
754 (_v(l) - _v(m)) * sizeof ((V)[0])); \
755 clib_memset ((V) + _v(m), INIT, _v(n) * sizeof ((V)[0])); \
758 /** \brief Insert N vector elements starting at element M,
759 initialize new elements to zero (general version)
761 @param V (possibly NULL) pointer to a vector.
762 @param N number of elements to insert
763 @param M insertion point
764 @param H header size in bytes (may be zero)
765 @param A alignment (may be zero)
766 @return V (value-result macro parameter)
768 #define vec_insert_ha(V,N,M,H,A) vec_insert_init_empty_ha(V,N,M,0,H,A)
770 /** \brief Insert N vector elements starting at element M,
771 initialize new elements to zero (no header, unspecified alignment)
773 @param V (possibly NULL) pointer to a vector.
774 @param N number of elements to insert
775 @param M insertion point
776 @return V (value-result macro parameter)
778 #define vec_insert(V,N,M) vec_insert_ha(V,N,M,0,0)
780 /** \brief Insert N vector elements starting at element M,
781 initialize new elements to zero (no header, alignment specified)
783 @param V (possibly NULL) pointer to a vector.
784 @param N number of elements to insert
785 @param M insertion point
786 @param A alignment (may be zero)
787 @return V (value-result macro parameter)
789 #define vec_insert_aligned(V,N,M,A) vec_insert_ha(V,N,M,0,A)
791 /** \brief Insert N vector elements starting at element M,
792 initialize new elements (no header, unspecified alignment)
794 @param V (possibly NULL) pointer to a vector.
795 @param N number of elements to insert
796 @param M insertion point
797 @param INIT initial value (can be a complex expression!)
798 @return V (value-result macro parameter)
801 #define vec_insert_init_empty(V,N,M,INIT) \
802 vec_insert_init_empty_ha(V,N,M,INIT,0,0)
803 /* Resize vector by N elements starting from element M, initialize new elements to INIT (alignment specified, no header). */
805 /** \brief Insert N vector elements starting at element M,
806 initialize new elements (no header, specified alignment)
808 @param V (possibly NULL) pointer to a vector.
809 @param N number of elements to insert
810 @param M insertion point
811 @param INIT initial value (can be a complex expression!)
812 @param A alignment (may be zero)
813 @return V (value-result macro parameter)
815 #define vec_insert_init_empty_aligned(V,N,M,INIT,A) \
816 vec_insert_init_empty_ha(V,N,M,INIT,0,A)
818 /** \brief Insert N vector elements starting at element M,
819 insert given elements (general version)
821 @param V (possibly NULL) pointer to a vector.
822 @param E element(s) to insert
823 @param N number of elements to insert
824 @param M insertion point
825 @param H header size in bytes (may be zero)
826 @param A alignment (may be zero)
827 @return V (value-result macro parameter)
830 #define vec_insert_elts_ha(V, E, N, M, H, A) \
834 if (PREDICT_TRUE (_v (n) > 0)) \
836 word _v (l) = vec_len (V); \
838 V = _vec_resize ((V), _v (n), (_v (l) + _v (n)) * sizeof ((V)[0]), \
840 ASSERT (_v (m) <= _v (l)); \
841 memmove ((V) + _v (m) + _v (n), (V) + _v (m), \
842 (_v (l) - _v (m)) * sizeof ((V)[0])); \
843 clib_memcpy_fast ((V) + _v (m), (E), _v (n) * sizeof ((V)[0])); \
848 /** \brief Insert N vector elements starting at element M,
849 insert given elements (no header, unspecified alignment)
851 @param V (possibly NULL) pointer to a vector.
852 @param E element(s) to insert
853 @param N number of elements to insert
854 @param M insertion point
855 @return V (value-result macro parameter)
857 #define vec_insert_elts(V,E,N,M) vec_insert_elts_ha(V,E,N,M,0,0)
859 /** \brief Insert N vector elements starting at element M,
860 insert given elements (no header, specified alignment)
862 @param V (possibly NULL) pointer to a vector.
863 @param E element(s) to insert
864 @param N number of elements to insert
865 @param M insertion point
866 @param A alignment (may be zero)
867 @return V (value-result macro parameter)
869 #define vec_insert_elts_aligned(V,E,N,M,A) vec_insert_elts_ha(V,E,N,M,0,A)
871 /** \brief Delete N elements starting at element M
873 @param V pointer to a vector
874 @param N number of elements to delete
875 @param M first element to delete
876 @return V (value-result macro parameter)
878 #define vec_delete(V,N,M) \
880 word _v(l) = vec_len (V); \
883 /* Copy over deleted elements. */ \
884 if (_v(l) - _v(n) - _v(m) > 0) \
885 memmove ((V) + _v(m), (V) + _v(m) + _v(n), \
886 (_v(l) - _v(n) - _v(m)) * sizeof ((V)[0])); \
887 /* Zero empty space at end (for future re-allocation). */ \
889 clib_memset ((V) + _v(l) - _v(n), 0, _v(n) * sizeof ((V)[0])); \
890 _vec_len (V) -= _v(n); \
891 CLIB_MEM_POISON(vec_end(V), _v(n) * sizeof ((V)[0])); \
894 /** \brief Delete the element at index I
896 @param V pointer to a vector
897 @param I index to delete
899 #define vec_del1(v,i) \
901 uword _vec_del_l = _vec_len (v) - 1; \
902 uword _vec_del_i = (i); \
903 if (_vec_del_i < _vec_del_l) \
904 (v)[_vec_del_i] = (v)[_vec_del_l]; \
905 _vec_len (v) = _vec_del_l; \
906 CLIB_MEM_POISON(vec_end(v), sizeof ((v)[0])); \
909 /** \brief Append v2 after v1. Result in v1.
910 @param V1 target vector
911 @param V2 vector to append
914 #define vec_append(v1, v2) \
917 uword _v (l1) = vec_len (v1); \
918 uword _v (l2) = vec_len (v2); \
920 if (PREDICT_TRUE (_v (l2) > 0)) \
922 v1 = _vec_resize ((v1), _v (l2), \
923 (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, 0); \
924 clib_memcpy_fast ((v1) + _v (l1), (v2), \
925 _v (l2) * sizeof ((v2)[0])); \
930 /** \brief Append v2 after v1. Result in v1. Specified alignment.
931 @param V1 target vector
932 @param V2 vector to append
933 @param align required alignment
936 #define vec_append_aligned(v1, v2, align) \
939 uword _v (l1) = vec_len (v1); \
940 uword _v (l2) = vec_len (v2); \
942 if (PREDICT_TRUE (_v (l2) > 0)) \
945 (v1), _v (l2), (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, align); \
946 clib_memcpy_fast ((v1) + _v (l1), (v2), \
947 _v (l2) * sizeof ((v2)[0])); \
952 /** \brief Prepend v2 before v1. Result in v1.
953 @param V1 target vector
954 @param V2 vector to prepend
957 #define vec_prepend(v1, v2) \
960 uword _v (l1) = vec_len (v1); \
961 uword _v (l2) = vec_len (v2); \
963 if (PREDICT_TRUE (_v (l2) > 0)) \
965 v1 = _vec_resize ((v1), _v (l2), \
966 (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, 0); \
967 memmove ((v1) + _v (l2), (v1), _v (l1) * sizeof ((v1)[0])); \
968 clib_memcpy_fast ((v1), (v2), _v (l2) * sizeof ((v2)[0])); \
973 /** \brief Prepend v2 before v1. Result in v1. Specified alignment
974 @param V1 target vector
975 @param V2 vector to prepend
976 @param align required alignment
979 #define vec_prepend_aligned(v1, v2, align) \
982 uword _v (l1) = vec_len (v1); \
983 uword _v (l2) = vec_len (v2); \
985 if (PREDICT_TRUE (_v (l2) > 0)) \
988 (v1), _v (l2), (_v (l1) + _v (l2)) * sizeof ((v1)[0]), 0, align); \
989 memmove ((v1) + _v (l2), (v1), _v (l1) * sizeof ((v1)[0])); \
990 clib_memcpy_fast ((v1), (v2), _v (l2) * sizeof ((v2)[0])); \
995 /** \brief Zero all vector elements. Null-pointer tolerant.
996 @param var Vector to zero
998 #define vec_zero(var) \
1001 clib_memset ((var), 0, vec_len (var) * sizeof ((var)[0])); \
1004 /** \brief Set all vector elements to given value. Null-pointer tolerant.
1005 @param v vector to set
1006 @param val value for each vector element
1008 #define vec_set(v,val) \
1011 __typeof__ ((v)[0]) _val = (val); \
1012 for (_v(i) = 0; _v(i) < vec_len (v); _v(i)++) \
1013 (v)[_v(i)] = _val; \
1017 #include <stdlib.h> /* for qsort */
1020 /** \brief Compare two vectors, not NULL-pointer tolerant
1022 @param v1 Pointer to a vector
1023 @param v2 Pointer to a vector
1024 @return 1 if equal, 0 if unequal
1026 #define vec_is_equal(v1,v2) \
1027 (vec_len (v1) == vec_len (v2) && ! memcmp ((v1), (v2), vec_len (v1) * sizeof ((v1)[0])))
1029 /** \brief Compare two vectors (only applicable to vectors of signed numbers).
1030 Used in qsort compare functions.
1032 @param v1 Pointer to a vector
1033 @param v2 Pointer to a vector
1036 #define vec_cmp(v1,v2) \
1038 word _v(i), _v(cmp), _v(l); \
1039 _v(l) = clib_min (vec_len (v1), vec_len (v2)); \
1041 for (_v(i) = 0; _v(i) < _v(l); _v(i)++) { \
1042 _v(cmp) = (v1)[_v(i)] - (v2)[_v(i)]; \
1046 if (_v(cmp) == 0 && _v(l) > 0) \
1047 _v(cmp) = vec_len(v1) - vec_len(v2); \
1048 (_v(cmp) < 0 ? -1 : (_v(cmp) > 0 ? +1 : 0)); \
1051 /** \brief Search a vector for the index of the entry that matches.
1053 @param v Pointer to a vector
1054 @param E Entry to match
1055 @return index of match or ~0
1057 #define vec_search(v,E) \
1060 while (_v(i) < vec_len(v)) \
1062 if ((v)[_v(i)] == E) \
1066 if (_v(i) == vec_len(v)) \
1071 /** \brief Search a vector for the index of the entry that matches.
1073 @param v Pointer to a vector
1074 @param E Pointer to entry to match
1075 @param fn Comparison function !0 => match
1076 @return index of match or ~0
1078 #define vec_search_with_function(v,E,fn) \
1081 while (_v(i) < vec_len(v)) \
1083 if (0 != fn(&(v)[_v(i)], (E))) \
1087 if (_v(i) == vec_len(v)) \
1092 /** \brief Sort a vector using the supplied element comparison function
1094 Does not depend on the underlying implementation to deal correctly
1095 with null, zero-long, or 1-long vectors
1097 @param vec vector to sort
1098 @param f comparison function
1100 #define vec_sort_with_function(vec,f) \
1102 if (vec_len (vec) > 1) \
1103 qsort (vec, vec_len (vec), sizeof (vec[0]), (void *) (f)); \
1106 /** \brief Make a vector containing a NULL terminated c-string.
1108 @param V (possibly NULL) pointer to a vector.
1109 @param S pointer to string buffer.
1110 @param L string length (NOT including the terminating NULL; a la strlen())
1112 #define vec_validate_init_c_string(V, S, L) \
1114 vec_reset_length (V); \
1115 vec_validate ((V), (L)); \
1117 clib_memcpy_fast ((V), (S), (L)); \
1122 /** \brief Test whether a vector is a NULL terminated c-string.
1124 @param V (possibly NULL) pointer to a vector.
1125 @return BOOLEAN indicating if the vector c-string is null terminated.
1127 #define vec_c_string_is_terminated(V) \
1128 (((V) != 0) && (vec_len (V) != 0) && ((V)[vec_len ((V)) - 1] == 0))
1130 /** \brief (If necessary) NULL terminate a vector containing a c-string.
1132 @param V (possibly NULL) pointer to a vector.
1133 @return V (value-result macro parameter)
1135 #define vec_terminate_c_string(V) \
1137 u32 vl = vec_len ((V)); \
1138 if (!vec_c_string_is_terminated(V)) \
1140 vec_validate ((V), vl); \
1145 #endif /* included_vec_h */
1149 * fd.io coding-style-patch-verification: ON
1152 * eval: (c-set-style "gnu")