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.
5 * You may obtain a copy of the License at:
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10 * distributed under the License is distributed on an "AS IS" BASIS,
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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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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,
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31 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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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(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 Predicate function, says whether the supplied vector is a clib heap
213 object (general version).
215 @param v pointer to a vector
216 @param header_bytes vector header size in bytes (may be zero)
219 uword clib_mem_is_vec_h (void *v, uword header_bytes);
222 /** \brief Predicate function, says whether the supplied vector is a clib heap
225 @param v pointer to a vector
229 clib_mem_is_vec (void *v)
231 return clib_mem_is_vec_h (v, 0);
234 /* Local variable naming macro (prevents collisions with other macro naming). */
235 #define _v(var) _vec_##var
237 /** \brief Resize a vector (general version).
238 Add N elements to end of given vector V, return pointer to start of vector.
239 Vector will have room for H header bytes and will have user's data aligned
240 at alignment A (rounded to next power of 2).
242 @param V pointer to a vector
243 @param N number of elements to add
244 @param H header size in bytes (may be zero)
245 @param A alignment (may be zero)
246 @param S numa_id (may be zero)
247 @return V (value-result macro parameter)
250 #define vec_resize_has(V,N,H,A,S) \
253 word _v(l) = vec_len (V); \
254 V = _vec_resize_numa ((V), _v(n), \
255 (_v(l) + _v(n)) * sizeof ((V)[0]), \
259 /** \brief Resize a vector (less general version).
260 Add N elements to end of given vector V, return pointer to start of vector.
261 Vector will have room for H header bytes and will have user's data aligned
262 at alignment A (rounded to next power of 2).
264 @param V pointer to a vector
265 @param N number of elements to add
266 @param H header size in bytes (may be zero)
267 @param A alignment (may be zero)
268 @return V (value-result macro parameter)
270 #define vec_resize_ha(V,N,H,A) vec_resize_has(V,N,H,A,VEC_NUMA_UNSPECIFIED)
272 /** \brief Resize a vector (no header, unspecified alignment)
273 Add N elements to end of given vector V, return pointer to start of vector.
274 Vector will have room for H header bytes and will have user's data aligned
275 at alignment A (rounded to next power of 2).
277 @param V pointer to a vector
278 @param N number of elements to add
279 @return V (value-result macro parameter)
281 #define vec_resize(V,N) vec_resize_ha(V,N,0,0)
283 /** \brief Resize a vector (no header, alignment specified).
284 Add N elements to end of given vector V, return pointer to start of vector.
285 Vector will have room for H header bytes and will have user's data aligned
286 at alignment A (rounded to next power of 2).
288 @param V pointer to a vector
289 @param N number of elements to add
290 @param A alignment (may be zero)
291 @return V (value-result macro parameter)
294 #define vec_resize_aligned(V,N,A) vec_resize_ha(V,N,0,A)
296 /** \brief Allocate space for N more elements
298 @param V pointer to a vector
299 @param N number of elements to add
300 @param H header size in bytes (may be zero)
301 @param A alignment (may be zero)
302 @return V (value-result macro parameter)
305 #define vec_alloc_ha(V,N,H,A) \
307 uword _v(l) = vec_len (V); \
308 vec_resize_ha (V, N, H, A); \
309 _vec_len (V) = _v(l); \
312 /** \brief Allocate space for N more elements
313 (no header, unspecified alignment)
315 @param V pointer to a vector
316 @param N number of elements to add
317 @return V (value-result macro parameter)
319 #define vec_alloc(V,N) vec_alloc_ha(V,N,0,0)
321 /** \brief Allocate space for N more elements (no header, given alignment)
322 @param V pointer to a vector
323 @param N number of elements to add
324 @param A alignment (may be zero)
325 @return V (value-result macro parameter)
328 #define vec_alloc_aligned(V,N,A) vec_alloc_ha(V,N,0,A)
330 /** \brief Create new vector of given type and length (general version).
331 @param T type of elements in new vector
332 @param N number of elements to add
333 @param H header size in bytes (may be zero)
334 @param A alignment (may be zero)
337 #define vec_new_ha(T,N,H,A) \
340 (T *)_vec_resize ((T *) 0, _v(n), _v(n) * sizeof (T), (H), (A)); \
343 /** \brief Create new vector of given type and length
344 (unspecified alignment, no header).
346 @param T type of elements in new vector
347 @param N number of elements to add
350 #define vec_new(T,N) vec_new_ha(T,N,0,0)
351 /** \brief Create new vector of given type and length
352 (alignment specified, no header).
354 @param T type of elements in new vector
355 @param N number of elements to add
356 @param A alignment (may be zero)
359 #define vec_new_aligned(T,N,A) vec_new_ha(T,N,0,A)
361 /** \brief Free vector's memory (general version)
363 @param V pointer to a vector
364 @param H size of header in bytes
365 @return V (value-result parameter, V=0)
367 #define vec_free_h(V,H) \
371 clib_mem_free (vec_header ((V), (H))); \
376 /** \brief Free vector's memory (no header).
377 @param V pointer to a vector
378 @return V (value-result parameter, V=0)
380 #define vec_free(V) vec_free_h(V,0)
382 /**\brief Free vector user header (syntactic sugar)
383 @param h vector header
386 #define vec_free_header(h) clib_mem_free (h)
388 /** \brief Return copy of vector (general version).
390 @param V pointer to a vector
391 @param H size of header in bytes
392 @param A alignment (may be zero)
393 @param S numa (may be VEC_NUMA_UNSPECIFIED)
395 @return Vdup copy of vector
398 #define vec_dup_ha_numa(V,H,A,S) \
400 __typeof__ ((V)[0]) * _v(v) = 0; \
401 uword _v(l) = vec_len (V); \
404 vec_resize_has (_v(v), _v(l), (H), (A), (S)); \
405 clib_memcpy_fast (_v(v), (V), _v(l) * sizeof ((V)[0]));\
410 /** \brief Return copy of vector (VEC_NUMA_UNSPECIFIED).
412 @param V pointer to a vector
413 @param H size of header in bytes
414 @param A alignment (may be zero)
416 @return Vdup copy of vector
418 #define vec_dup_ha(V,H,A) \
419 vec_dup_ha_numa(V,H,A,VEC_NUMA_UNSPECIFIED)
422 /** \brief Return copy of vector (no header, no alignment)
424 @param V pointer to a vector
425 @return Vdup copy of vector
427 #define vec_dup(V) vec_dup_ha(V,0,0)
429 /** \brief Return copy of vector (no header, alignment specified).
431 @param V pointer to a vector
432 @param A alignment (may be zero)
434 @return Vdup copy of vector
436 #define vec_dup_aligned(V,A) vec_dup_ha(V,0,A)
438 /** \brief Copy a vector, memcpy wrapper. Assumes sizeof(SRC[0]) ==
441 @param DST destination
444 #define vec_copy(DST,SRC) clib_memcpy_fast (DST, SRC, vec_len (DST) * \
447 /** \brief Clone a vector. Make a new vector with the
448 same size as a given vector but possibly with a different type.
450 @param NEW_V pointer to new vector
451 @param OLD_V pointer to old vector
453 #define vec_clone(NEW_V,OLD_V) \
456 (NEW_V) = _vec_resize ((NEW_V), vec_len (OLD_V), \
457 vec_len (OLD_V) * sizeof ((NEW_V)[0]), (0), (0)); \
460 /** \brief Make sure vector is long enough for given index (general version).
462 @param V (possibly NULL) pointer to a vector.
463 @param I vector index which will be valid upon return
464 @param H header size in bytes (may be zero)
465 @param A alignment (may be zero)
466 @param N numa_id (may be zero)
467 @return V (value-result macro parameter)
470 #define vec_validate_han(V,I,H,A,N) \
473 STATIC_ASSERT(A==0 || ((A % sizeof(V[0]))==0) \
474 || ((sizeof(V[0]) % A) == 0), \
475 "vector validate aligned on incorrectly sized object"); \
477 word _v(l) = vec_len (V); \
478 if (_v(i) >= _v(l)) \
480 /* switch to the per-numa heap if directed */ \
481 if (PREDICT_FALSE(N != VEC_NUMA_UNSPECIFIED)) \
483 oldheap = clib_mem_get_per_cpu_heap(); \
484 clib_mem_set_per_cpu_heap (clib_mem_get_per_numa_heap(N)); \
487 vec_resize_ha ((V), 1 + (_v(i) - _v(l)), (H), (A)); \
488 /* Must zero new space since user may have previously \
489 used e.g. _vec_len (v) -= 10 */ \
490 clib_memset ((V) + _v(l), 0, \
491 (1 + (_v(i) - _v(l))) * sizeof ((V)[0])); \
492 /* Switch back to the global heap */ \
493 if (PREDICT_FALSE (N != VEC_NUMA_UNSPECIFIED)) \
494 clib_mem_set_per_cpu_heap (oldheap); \
498 #define vec_validate_ha(V,I,H,A) vec_validate_han(V,I,H,A,VEC_NUMA_UNSPECIFIED)
500 /** \brief Make sure vector is long enough for given index
501 (no header, unspecified alignment)
503 @param V (possibly NULL) pointer to a vector.
504 @param I vector index which will be valid upon return
505 @return V (value-result macro parameter)
507 #define vec_validate(V,I) vec_validate_ha(V,I,0,0)
509 /** \brief Make sure vector is long enough for given index
510 (no header, specified alignment)
512 @param V (possibly NULL) pointer to a vector.
513 @param I vector index which will be valid upon return
514 @param A alignment (may be zero)
515 @return V (value-result macro parameter)
518 #define vec_validate_aligned(V,I,A) vec_validate_ha(V,I,0,A)
520 /** \brief Make sure vector is long enough for given index
521 and initialize empty space (general version)
523 @param V (possibly NULL) pointer to a vector.
524 @param I vector index which will be valid upon return
525 @param INIT initial value (can be a complex expression!)
526 @param H header size in bytes (may be zero)
527 @param A alignment (may be zero)
528 @return V (value-result macro parameter)
530 #define vec_validate_init_empty_ha(V,I,INIT,H,A) \
533 word _v(l) = vec_len (V); \
534 if (_v(i) >= _v(l)) \
536 vec_resize_ha ((V), 1 + (_v(i) - _v(l)), (H), (A)); \
537 while (_v(l) <= _v(i)) \
539 (V)[_v(l)] = (INIT); \
545 /** \brief Make sure vector is long enough for given index
546 and initialize empty space (no header, unspecified alignment)
548 @param V (possibly NULL) pointer to a vector.
549 @param I vector index which will be valid upon return
550 @param INIT initial value (can be a complex expression!)
551 @return V (value-result macro parameter)
554 #define vec_validate_init_empty(V,I,INIT) \
555 vec_validate_init_empty_ha(V,I,INIT,0,0)
557 /** \brief Make sure vector is long enough for given index
558 and initialize empty space (no header, alignment alignment)
560 @param V (possibly NULL) pointer to a vector.
561 @param I vector index which will be valid upon return
562 @param INIT initial value (can be a complex expression!)
563 @param A alignment (may be zero)
564 @return V (value-result macro parameter)
566 #define vec_validate_init_empty_aligned(V,I,INIT,A) \
567 vec_validate_init_empty_ha(V,I,INIT,0,A)
569 /** \brief Add 1 element to end of vector (general version).
571 @param V pointer to a vector
572 @param E element to add
573 @param H header size in bytes (may be zero)
574 @param A alignment (may be zero)
575 @return V (value-result macro parameter)
577 #define vec_add1_ha(V,E,H,A) \
579 word _v(l) = vec_len (V); \
580 V = _vec_resize ((V), 1, (_v(l) + 1) * sizeof ((V)[0]), (H), (A)); \
584 /** \brief Add 1 element to end of vector (unspecified alignment).
586 @param V pointer to a vector
587 @param E element to add
588 @return V (value-result macro parameter)
590 #define vec_add1(V,E) vec_add1_ha(V,E,0,0)
592 /** \brief Add 1 element to end of vector (alignment specified).
594 @param V pointer to a vector
595 @param E element to add
596 @param A alignment (may be zero)
597 @return V (value-result macro parameter)
599 #define vec_add1_aligned(V,E,A) vec_add1_ha(V,E,0,A)
601 /** \brief Add N elements to end of vector V,
602 return pointer to new elements in P. (general version)
604 @param V pointer to a vector
605 @param P pointer to new vector element(s)
606 @param N number of elements to add
607 @param H header size in bytes (may be zero)
608 @param A alignment (may be zero)
609 @return V and P (value-result macro parameters)
611 #define vec_add2_ha(V,P,N,H,A) \
614 word _v(l) = vec_len (V); \
615 V = _vec_resize ((V), _v(n), (_v(l) + _v(n)) * sizeof ((V)[0]), (H), (A)); \
619 /** \brief Add N elements to end of vector V,
620 return pointer to new elements in P. (no header, unspecified alignment)
622 @param V pointer to a vector
623 @param P pointer to new vector element(s)
624 @param N number of elements to add
625 @return V and P (value-result macro parameters)
628 #define vec_add2(V,P,N) vec_add2_ha(V,P,N,0,0)
630 /** \brief Add N elements to end of vector V,
631 return pointer to new elements in P. (no header, alignment specified)
633 @param V pointer to a vector
634 @param P pointer to new vector element(s)
635 @param N number of elements to add
636 @param A alignment (may be zero)
637 @return V and P (value-result macro parameters)
640 #define vec_add2_aligned(V,P,N,A) vec_add2_ha(V,P,N,0,A)
642 /** \brief Add N elements to end of vector V (general version)
644 @param V pointer to a vector
645 @param E pointer to element(s) to add
646 @param N number of elements to add
647 @param H header size in bytes (may be zero)
648 @param A alignment (may be zero)
649 @return V (value-result macro parameter)
651 #define vec_add_ha(V,E,N,H,A) \
654 word _v(l) = vec_len (V); \
655 V = _vec_resize ((V), _v(n), (_v(l) + _v(n)) * sizeof ((V)[0]), (H), (A)); \
656 clib_memcpy_fast ((V) + _v(l), (E), _v(n) * sizeof ((V)[0])); \
659 /** \brief Add N elements to end of vector V (no header, unspecified alignment)
661 @param V pointer to a vector
662 @param E pointer to element(s) to add
663 @param N number of elements to add
664 @return V (value-result macro parameter)
666 #define vec_add(V,E,N) vec_add_ha(V,E,N,0,0)
668 /** \brief Add N elements to end of vector V (no header, specified alignment)
670 @param V pointer to a vector
671 @param E pointer to element(s) to add
672 @param N number of elements to add
673 @param A alignment (may be zero)
674 @return V (value-result macro parameter)
676 #define vec_add_aligned(V,E,N,A) vec_add_ha(V,E,N,0,A)
678 /** \brief Returns last element of a vector and decrements its length
680 @param V pointer to a vector
681 @return E element removed from the end of the vector
685 uword _v(l) = vec_len (V); \
686 ASSERT (_v(l) > 0); \
688 _vec_len (V) = _v (l); \
692 /** \brief Set E to the last element of a vector, decrement vector length
693 @param V pointer to a vector
694 @param E pointer to the last vector element
695 @return E element removed from the end of the vector
696 (value-result macro parameter
699 #define vec_pop2(V,E) \
701 uword _v(l) = vec_len (V); \
702 if (_v(l) > 0) (E) = vec_pop (V); \
706 /** \brief Insert N vector elements starting at element M,
707 initialize new elements (general version).
709 @param V (possibly NULL) pointer to a vector.
710 @param N number of elements to insert
711 @param M insertion point
712 @param INIT initial value (can be a complex expression!)
713 @param H header size in bytes (may be zero)
714 @param A alignment (may be zero)
715 @return V (value-result macro parameter)
717 #define vec_insert_init_empty_ha(V,N,M,INIT,H,A) \
719 word _v(l) = vec_len (V); \
722 V = _vec_resize ((V), \
724 (_v(l) + _v(n))*sizeof((V)[0]), \
726 ASSERT (_v(m) <= _v(l)); \
727 memmove ((V) + _v(m) + _v(n), \
729 (_v(l) - _v(m)) * sizeof ((V)[0])); \
730 clib_memset ((V) + _v(m), INIT, _v(n) * sizeof ((V)[0])); \
733 /** \brief Insert N vector elements starting at element M,
734 initialize new elements to zero (general version)
736 @param V (possibly NULL) pointer to a vector.
737 @param N number of elements to insert
738 @param M insertion point
739 @param H header size in bytes (may be zero)
740 @param A alignment (may be zero)
741 @return V (value-result macro parameter)
743 #define vec_insert_ha(V,N,M,H,A) vec_insert_init_empty_ha(V,N,M,0,H,A)
745 /** \brief Insert N vector elements starting at element M,
746 initialize new elements to zero (no header, unspecified alignment)
748 @param V (possibly NULL) pointer to a vector.
749 @param N number of elements to insert
750 @param M insertion point
751 @return V (value-result macro parameter)
753 #define vec_insert(V,N,M) vec_insert_ha(V,N,M,0,0)
755 /** \brief Insert N vector elements starting at element M,
756 initialize new elements to zero (no header, alignment specified)
758 @param V (possibly NULL) pointer to a vector.
759 @param N number of elements to insert
760 @param M insertion point
761 @param A alignment (may be zero)
762 @return V (value-result macro parameter)
764 #define vec_insert_aligned(V,N,M,A) vec_insert_ha(V,N,M,0,A)
766 /** \brief Insert N vector elements starting at element M,
767 initialize new elements (no header, unspecified alignment)
769 @param V (possibly NULL) pointer to a vector.
770 @param N number of elements to insert
771 @param M insertion point
772 @param INIT initial value (can be a complex expression!)
773 @return V (value-result macro parameter)
776 #define vec_insert_init_empty(V,N,M,INIT) \
777 vec_insert_init_empty_ha(V,N,M,INIT,0,0)
778 /* Resize vector by N elements starting from element M, initialize new elements to INIT (alignment specified, no header). */
780 /** \brief Insert N vector elements starting at element M,
781 initialize new elements (no header, specified alignment)
783 @param V (possibly NULL) pointer to a vector.
784 @param N number of elements to insert
785 @param M insertion point
786 @param INIT initial value (can be a complex expression!)
787 @param A alignment (may be zero)
788 @return V (value-result macro parameter)
790 #define vec_insert_init_empty_aligned(V,N,M,INIT,A) \
791 vec_insert_init_empty_ha(V,N,M,INIT,0,A)
793 /** \brief Insert N vector elements starting at element M,
794 insert given elements (general version)
796 @param V (possibly NULL) pointer to a vector.
797 @param E element(s) to insert
798 @param N number of elements to insert
799 @param M insertion point
800 @param H header size in bytes (may be zero)
801 @param A alignment (may be zero)
802 @return V (value-result macro parameter)
805 #define vec_insert_elts_ha(V,E,N,M,H,A) \
807 word _v(l) = vec_len (V); \
810 V = _vec_resize ((V), \
812 (_v(l) + _v(n))*sizeof((V)[0]), \
814 ASSERT (_v(m) <= _v(l)); \
815 memmove ((V) + _v(m) + _v(n), \
817 (_v(l) - _v(m)) * sizeof ((V)[0])); \
818 clib_memcpy_fast ((V) + _v(m), (E), \
819 _v(n) * sizeof ((V)[0])); \
822 /** \brief Insert N vector elements starting at element M,
823 insert given elements (no header, unspecified alignment)
825 @param V (possibly NULL) pointer to a vector.
826 @param E element(s) to insert
827 @param N number of elements to insert
828 @param M insertion point
829 @return V (value-result macro parameter)
831 #define vec_insert_elts(V,E,N,M) vec_insert_elts_ha(V,E,N,M,0,0)
833 /** \brief Insert N vector elements starting at element M,
834 insert given elements (no header, specified alignment)
836 @param V (possibly NULL) pointer to a vector.
837 @param E element(s) to insert
838 @param N number of elements to insert
839 @param M insertion point
840 @param A alignment (may be zero)
841 @return V (value-result macro parameter)
843 #define vec_insert_elts_aligned(V,E,N,M,A) vec_insert_elts_ha(V,E,N,M,0,A)
845 /** \brief Delete N elements starting at element M
847 @param V pointer to a vector
848 @param N number of elements to delete
849 @param M first element to delete
850 @return V (value-result macro parameter)
852 #define vec_delete(V,N,M) \
854 word _v(l) = vec_len (V); \
857 /* Copy over deleted elements. */ \
858 if (_v(l) - _v(n) - _v(m) > 0) \
859 memmove ((V) + _v(m), (V) + _v(m) + _v(n), \
860 (_v(l) - _v(n) - _v(m)) * sizeof ((V)[0])); \
861 /* Zero empty space at end (for future re-allocation). */ \
863 clib_memset ((V) + _v(l) - _v(n), 0, _v(n) * sizeof ((V)[0])); \
864 _vec_len (V) -= _v(n); \
865 CLIB_MEM_POISON(vec_end(V), _v(n) * sizeof ((V)[0])); \
868 /** \brief Delete the element at index I
870 @param V pointer to a vector
871 @param I index to delete
873 #define vec_del1(v,i) \
875 uword _vec_del_l = _vec_len (v) - 1; \
876 uword _vec_del_i = (i); \
877 if (_vec_del_i < _vec_del_l) \
878 (v)[_vec_del_i] = (v)[_vec_del_l]; \
879 _vec_len (v) = _vec_del_l; \
880 CLIB_MEM_POISON(vec_end(v), sizeof ((v)[0])); \
883 /** \brief Append v2 after v1. Result in v1.
884 @param V1 target vector
885 @param V2 vector to append
888 #define vec_append(v1,v2) \
890 uword _v(l1) = vec_len (v1); \
891 uword _v(l2) = vec_len (v2); \
893 v1 = _vec_resize ((v1), _v(l2), \
894 (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, 0); \
895 clib_memcpy_fast ((v1) + _v(l1), (v2), _v(l2) * sizeof ((v2)[0])); \
898 /** \brief Append v2 after v1. Result in v1. Specified alignment.
899 @param V1 target vector
900 @param V2 vector to append
901 @param align required alignment
904 #define vec_append_aligned(v1,v2,align) \
906 uword _v(l1) = vec_len (v1); \
907 uword _v(l2) = vec_len (v2); \
909 v1 = _vec_resize ((v1), _v(l2), \
910 (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, align); \
911 clib_memcpy_fast ((v1) + _v(l1), (v2), _v(l2) * sizeof ((v2)[0])); \
914 /** \brief Prepend v2 before v1. Result in v1.
915 @param V1 target vector
916 @param V2 vector to prepend
919 #define vec_prepend(v1,v2) \
921 uword _v(l1) = vec_len (v1); \
922 uword _v(l2) = vec_len (v2); \
924 v1 = _vec_resize ((v1), _v(l2), \
925 (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, 0); \
926 memmove ((v1) + _v(l2), (v1), _v(l1) * sizeof ((v1)[0])); \
927 clib_memcpy_fast ((v1), (v2), _v(l2) * sizeof ((v2)[0])); \
930 /** \brief Prepend v2 before v1. Result in v1. Specified alignment
931 @param V1 target vector
932 @param V2 vector to prepend
933 @param align required alignment
936 #define vec_prepend_aligned(v1,v2,align) \
938 uword _v(l1) = vec_len (v1); \
939 uword _v(l2) = vec_len (v2); \
941 v1 = _vec_resize ((v1), _v(l2), \
942 (_v(l1) + _v(l2)) * sizeof ((v1)[0]), 0, align); \
943 memmove ((v1) + _v(l2), (v1), _v(l1) * sizeof ((v1)[0])); \
944 clib_memcpy_fast ((v1), (v2), _v(l2) * sizeof ((v2)[0])); \
948 /** \brief Zero all vector elements. Null-pointer tolerant.
949 @param var Vector to zero
951 #define vec_zero(var) \
954 clib_memset ((var), 0, vec_len (var) * sizeof ((var)[0])); \
957 /** \brief Set all vector elements to given value. Null-pointer tolerant.
958 @param v vector to set
959 @param val value for each vector element
961 #define vec_set(v,val) \
964 __typeof__ ((v)[0]) _val = (val); \
965 for (_v(i) = 0; _v(i) < vec_len (v); _v(i)++) \
970 #include <stdlib.h> /* for qsort */
973 /** \brief Compare two vectors, not NULL-pointer tolerant
975 @param v1 Pointer to a vector
976 @param v2 Pointer to a vector
977 @return 1 if equal, 0 if unequal
979 #define vec_is_equal(v1,v2) \
980 (vec_len (v1) == vec_len (v2) && ! memcmp ((v1), (v2), vec_len (v1) * sizeof ((v1)[0])))
982 /** \brief Compare two vectors (only applicable to vectors of signed numbers).
983 Used in qsort compare functions.
985 @param v1 Pointer to a vector
986 @param v2 Pointer to a vector
989 #define vec_cmp(v1,v2) \
991 word _v(i), _v(cmp), _v(l); \
992 _v(l) = clib_min (vec_len (v1), vec_len (v2)); \
994 for (_v(i) = 0; _v(i) < _v(l); _v(i)++) { \
995 _v(cmp) = (v1)[_v(i)] - (v2)[_v(i)]; \
999 if (_v(cmp) == 0 && _v(l) > 0) \
1000 _v(cmp) = vec_len(v1) - vec_len(v2); \
1001 (_v(cmp) < 0 ? -1 : (_v(cmp) > 0 ? +1 : 0)); \
1004 /** \brief Search a vector for the index of the entry that matches.
1006 @param v Pointer to a vector
1007 @param E Entry to match
1008 @return index of match or ~0
1010 #define vec_search(v,E) \
1013 while (_v(i) < vec_len(v)) \
1015 if ((v)[_v(i)] == E) \
1019 if (_v(i) == vec_len(v)) \
1024 /** \brief Search a vector for the index of the entry that matches.
1026 @param v Pointer to a vector
1027 @param E Pointer to entry to match
1028 @param fn Comparison function !0 => match
1029 @return index of match or ~0
1031 #define vec_search_with_function(v,E,fn) \
1034 while (_v(i) < vec_len(v)) \
1036 if (0 != fn(&(v)[_v(i)], (E))) \
1040 if (_v(i) == vec_len(v)) \
1045 /** \brief Sort a vector using the supplied element comparison function
1047 Does not depend on the underlying implementation to deal correctly
1048 with null, zero-long, or 1-long vectors
1050 @param vec vector to sort
1051 @param f comparison function
1053 #define vec_sort_with_function(vec,f) \
1055 if (vec_len (vec) > 1) \
1056 qsort (vec, vec_len (vec), sizeof (vec[0]), (void *) (f)); \
1059 /** \brief Make a vector containing a NULL terminated c-string.
1061 @param V (possibly NULL) pointer to a vector.
1062 @param S pointer to string buffer.
1063 @param L string length (NOT including the terminating NULL; a la strlen())
1065 #define vec_validate_init_c_string(V, S, L) \
1067 vec_reset_length (V); \
1068 vec_validate ((V), (L)); \
1070 clib_memcpy_fast ((V), (S), (L)); \
1075 /** \brief Test whether a vector is a NULL terminated c-string.
1077 @param V (possibly NULL) pointer to a vector.
1078 @return BOOLEAN indicating if the vector c-string is null terminated.
1080 #define vec_c_string_is_terminated(V) \
1081 (((V) != 0) && (vec_len (V) != 0) && ((V)[vec_len ((V)) - 1] == 0))
1083 /** \brief (If necessary) NULL terminate a vector containing a c-string.
1085 @param V (possibly NULL) pointer to a vector.
1086 @return V (value-result macro parameter)
1088 #define vec_terminate_c_string(V) \
1090 u32 vl = vec_len ((V)); \
1091 if (!vec_c_string_is_terminated(V)) \
1093 vec_validate ((V), vl); \
1098 #endif /* included_vec_h */
1102 * fd.io coding-style-patch-verification: ON
1105 * eval: (c-set-style "gnu")