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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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
33 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
34 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
35 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 #include <vppinfra/vec.h>
39 #include <vppinfra/mem.h>
41 /* Vector resize operator. Called as needed by various macros such as
42 vec_add1() when we need to allocate memory. */
43 void * vec_resize_allocate_memory (void * v,
44 word length_increment,
49 vec_header_t * vh = _vec_find (v);
50 uword old_alloc_bytes, new_alloc_bytes;
53 header_bytes = vec_header_bytes (header_bytes);
55 data_bytes += header_bytes;
59 new = clib_mem_alloc_aligned_at_offset (data_bytes, data_align, header_bytes);
60 data_bytes = clib_mem_size (new);
61 memset (new, 0, data_bytes);
62 v = new + header_bytes;
63 _vec_len (v) = length_increment;
67 vh->len += length_increment;
68 old = v - header_bytes;
70 /* Vector header must start heap object. */
71 ASSERT (clib_mem_is_heap_object (old));
73 old_alloc_bytes = clib_mem_size (old);
76 if (data_bytes <= old_alloc_bytes)
79 new_alloc_bytes = (old_alloc_bytes * 3) / 2;
80 if (new_alloc_bytes < data_bytes)
81 new_alloc_bytes = data_bytes;
83 new = clib_mem_alloc_aligned_at_offset (new_alloc_bytes, data_align, header_bytes);
85 /* FIXME fail gracefully. */
87 clib_panic ("vec_resize fails, length increment %d, data bytes %d, alignment %d",
88 length_increment, data_bytes, data_align);
90 memcpy (new, old, old_alloc_bytes);
94 /* Allocator may give a bit of extra room. */
95 new_alloc_bytes = clib_mem_size (v);
97 /* Zero new memory. */
98 memset (v + old_alloc_bytes, 0, new_alloc_bytes - old_alloc_bytes);
100 return v + header_bytes;
103 uword clib_mem_is_vec_h (void * v, uword header_bytes)
104 { return clib_mem_is_heap_object (vec_header (v, header_bytes)); }
112 void main (int argc, char * argv[])
114 word n = atoi (argv[1]);
121 FOO * foos = vec_init (FOO, 10), * f;
123 vec_validate (foos, 100);
127 for (i = 0; i < n; i++)
130 vec_add2 (foos, f, 1);
131 f->x = 2*i; f->y = 3*i; f->z = 4*i;
137 vec_delete (foos, n, m);
143 vec_insert (foos, n, m);