diff options
Diffstat (limited to 'src/vppinfra/vec.c')
| -rw-r--r-- | src/vppinfra/vec.c | 230 |
1 files changed, 59 insertions, 171 deletions
diff --git a/src/vppinfra/vec.c b/src/vppinfra/vec.c index 300ef8520ed..2fbab2f7e45 100644 --- a/src/vppinfra/vec.c +++ b/src/vppinfra/vec.c @@ -1,39 +1,6 @@ -/* - * Copyright (c) 2015 Cisco and/or its affiliates. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. +/* SPDX-License-Identifier: Apache-2.0 + * Copyright(c) 2022 Cisco Systems, Inc. */ -/* - Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus - - Permission is hereby granted, free of charge, to any person obtaining - a copy of this software and associated documentation files (the - "Software"), to deal in the Software without restriction, including - without limitation the rights to use, copy, modify, merge, publish, - distribute, sublicense, and/or sell copies of the Software, and to - permit persons to whom the Software is furnished to do so, subject to - the following conditions: - - The above copyright notice and this permission notice shall be - included in all copies or substantial portions of the Software. - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE - LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION - OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION - WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -*/ #include <vppinfra/vec.h> #include <vppinfra/mem.h> @@ -42,94 +9,74 @@ #define CLIB_VECTOR_GROW_BY_ONE 0 #endif -/* Vector resize operator. Called as needed by various macros such as - vec_add1() when we need to allocate memory. */ -__clib_export void * -vec_resize_allocate_memory (void *v, word length_increment, uword data_bytes, - uword header_bytes, uword data_align) +__clib_export uword +vec_mem_size (void *v) { - vec_header_t *vh = _vec_find (v); - uword old_alloc_bytes, new_alloc_bytes; - void *old, *new; - - header_bytes = vec_header_bytes (header_bytes); - data_align = data_align == 0 ? 1 : data_align; + return v ? clib_mem_size (v - vec_get_header_size (v)) : 0; +} - data_bytes += header_bytes; +__clib_export void * +_vec_realloc (void *v, uword n_elts, uword elt_sz, uword hdr_sz, uword align, + void *heap) +{ + uword n_data_bytes, data_offset, new_data_size, alloc_size; + void *p; /* alignment must be power of 2 */ - ASSERT (count_set_bits (data_align) == 1); - - if (!v) - { - new = clib_mem_alloc_aligned_at_offset (data_bytes, data_align, header_bytes, 1 /* yes, call os_out_of_memory */ - ); - new_alloc_bytes = clib_mem_size (new); - CLIB_MEM_UNPOISON (new + data_bytes, new_alloc_bytes - data_bytes); - clib_memset (new, 0, new_alloc_bytes); - CLIB_MEM_POISON (new + data_bytes, new_alloc_bytes - data_bytes); - v = new + header_bytes; - _vec_len (v) = length_increment; - ASSERT (header_bytes / VEC_HEADER_ROUND <= 255); - _vec_find (v)->hdr_size = header_bytes / VEC_HEADER_ROUND; - _vec_find (v)->log2_align = min_log2 (data_align); - return v; - } - - ASSERT (_vec_find (v)->hdr_size * VEC_HEADER_ROUND == header_bytes); - header_bytes = _vec_find (v)->hdr_size * VEC_HEADER_ROUND; + align = clib_max (align, VEC_MIN_ALIGN); + ASSERT (count_set_bits (align) == 1); - ASSERT (data_align == (1 << _vec_find (v)->log2_align)); - data_align = 1 << _vec_find (v)->log2_align; + /* number of bytes needed to store both vector header and optional user + * header */ + data_offset = round_pow2 (hdr_sz + sizeof (vec_header_t), align); - vh->len += length_increment; - old = v - header_bytes; + /* mumber of bytes needed to store vector data */ + n_data_bytes = n_elts * elt_sz; - /* Vector header must start heap object. */ - ASSERT (clib_mem_is_heap_object (old)); + /* minimal allocation needed to store data and headers */ + new_data_size = data_offset + n_data_bytes; - old_alloc_bytes = clib_mem_size (old); - - /* Need to resize? */ - if (data_bytes <= old_alloc_bytes) + if (v) { - CLIB_MEM_UNPOISON (v, data_bytes); - return v; + uword old_data_size = data_offset + _vec_len (v) * elt_sz; + p = vec_header (v); + alloc_size = clib_mem_size (p); + + /* check that we are still dealing with the same vector type */ + ASSERT (_vec_find (v)->hdr_size * VEC_MIN_ALIGN == data_offset); + ASSERT (_vec_find (v)->log2_align == min_log2 (align)); + + /* realloc if new size cannot fit into existing allocation */ + if (alloc_size < new_data_size) + { + if (CLIB_VECTOR_GROW_BY_ONE) + alloc_size = n_data_bytes + data_offset; + else + alloc_size = (n_data_bytes * 3) / 2 + data_offset; + + p = clib_mem_realloc_aligned (p, alloc_size, align); + alloc_size = clib_mem_size (p); + v = p + data_offset; + } + + CLIB_MEM_UNPOISON (p, alloc_size); + clib_memset_u8 (p + old_data_size, 0, alloc_size - old_data_size); + } + else + { + /* new allocation */ + p = clib_mem_alloc_aligned (new_data_size, align); + alloc_size = clib_mem_size (p); + CLIB_MEM_UNPOISON (p, alloc_size); + clib_memset_u8 (p, 0, alloc_size); + v = p + data_offset; + _vec_find (v)->hdr_size = data_offset / VEC_MIN_ALIGN; + _vec_find (v)->log2_align = min_log2 (align); } -#if CLIB_VECTOR_GROW_BY_ONE > 0 - new_alloc_bytes = data_bytes; -#else - new_alloc_bytes = (old_alloc_bytes * 3) / 2; - if (new_alloc_bytes < data_bytes) - new_alloc_bytes = data_bytes; -#endif - - new = - clib_mem_alloc_aligned_at_offset (new_alloc_bytes, data_align, - header_bytes, - 1 /* yes, call os_out_of_memory */ ); - - /* FIXME fail gracefully. */ - if (!new) - clib_panic - ("vec_resize fails, length increment %d, data bytes %d, alignment %d", - length_increment, data_bytes, data_align); - - CLIB_MEM_UNPOISON (old, old_alloc_bytes); - clib_memcpy_fast (new, old, old_alloc_bytes); - clib_mem_free (old); - - /* Allocator may give a bit of extra room. */ - new_alloc_bytes = clib_mem_size (new); - v = new; - - /* Zero new memory. */ - CLIB_MEM_UNPOISON (new + data_bytes, new_alloc_bytes - data_bytes); - memset (v + old_alloc_bytes, 0, new_alloc_bytes - old_alloc_bytes); - CLIB_MEM_POISON (new + data_bytes, new_alloc_bytes - data_bytes); - - return v + header_bytes; + CLIB_MEM_POISON (p + new_data_size, alloc_size - new_data_size); + _vec_len (v) = n_elts; + return v; } __clib_export u32 @@ -143,62 +90,3 @@ vec_free_not_inline (void *v) { vec_free (v); } - -/** \cond */ - -#ifdef TEST - -#include <stdio.h> - -void -main (int argc, char *argv[]) -{ - word n = atoi (argv[1]); - word i, *x = 0; - - typedef struct - { - word x, y, z; - } FOO; - - FOO *foos = vec_init (FOO, 10), *f; - - vec_validate (foos, 100); - foos[100].x = 99; - - _vec_len (foos) = 0; - for (i = 0; i < n; i++) - { - vec_add1 (x, i); - vec_add2 (foos, f, 1); - f->x = 2 * i; - f->y = 3 * i; - f->z = 4 * i; - } - - { - word n = 2; - word m = 42; - vec_delete (foos, n, m); - } - - { - word n = 2; - word m = 42; - vec_insert (foos, n, m); - } - - vec_free (x); - vec_free (foos); - exit (0); -} -#endif -/** \endcond */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |