diff options
Diffstat (limited to 'vppinfra/vppinfra/mhash.h')
| -rw-r--r-- | vppinfra/vppinfra/mhash.h | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/vppinfra/vppinfra/mhash.h b/vppinfra/vppinfra/mhash.h deleted file mode 100644 index 102adf4eb83..00000000000 --- a/vppinfra/vppinfra/mhash.h +++ /dev/null @@ -1,179 +0,0 @@ -/* - * 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. - */ -#ifndef included_clib_mhash_h -#define included_clib_mhash_h - -/* - Copyright (c) 2010 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/format.h> -#include <vppinfra/hash.h> -#include <vppinfra/heap.h> - -/* Hash table plus vector of keys. */ -typedef struct -{ - /* Vector or heap used to store keys. Hash table stores keys as byte - offsets into this vector. */ - u8 *key_vector_or_heap; - - /* Byte offsets of free keys in vector (used to store free keys when - n_key_bytes > 1). */ - u32 *key_vector_free_indices; - - u8 **key_tmps; - - /* Possibly fixed size of key. - 0 means keys are vectors of u8's. - 1 means keys are null terminated c strings. */ -#define MHASH_VEC_STRING_KEY 0 -#define MHASH_C_STRING_KEY 1 - u32 n_key_bytes; - - /* Seed value for Jenkins hash. */ - u32 hash_seed; - - /* Hash table mapping key -> value. */ - uword *hash; - - /* Format function for keys. */ - format_function_t *format_key; -} mhash_t; - -void mhash_init (mhash_t * h, uword n_value_bytes, uword n_key_bytes); - -always_inline void -mhash_init_c_string (mhash_t * h, uword n_value_bytes) -{ - mhash_init (h, n_value_bytes, MHASH_C_STRING_KEY); -} - -always_inline void -mhash_init_vec_string (mhash_t * h, uword n_value_bytes) -{ - mhash_init (h, n_value_bytes, MHASH_VEC_STRING_KEY); -} - -always_inline void * -mhash_key_to_mem (mhash_t * h, uword key) -{ - if (key == ~0) - { - u8 *key_tmp; - - int my_cpu = os_get_cpu_number (); - vec_validate (h->key_tmps, my_cpu); - key_tmp = h->key_tmps[my_cpu]; - return key_tmp; - } - return vec_elt_at_index (h->key_vector_or_heap, key); -} - -hash_pair_t *mhash_get_pair (mhash_t * h, const void *key); -uword mhash_set_mem (mhash_t * h, void *key, uword * new_value, - uword * old_value); -uword mhash_unset (mhash_t * h, void *key, uword * old_value); - -always_inline uword * -mhash_get (mhash_t * h, const void *key) -{ - hash_pair_t *p = mhash_get_pair (h, key); - return p ? &p->value[0] : 0; -} - -always_inline uword -mhash_set (mhash_t * h, void *key, uword new_value, uword * old_value) -{ - return mhash_set_mem (h, key, &new_value, old_value); -} - -always_inline uword -mhash_unset_key (mhash_t * h, uword key, uword * old_value) -{ - void *k = mhash_key_to_mem (h, key); - return mhash_unset (h, k, old_value); -} - -always_inline uword -mhash_value_bytes (mhash_t * m) -{ - hash_t *h = hash_header (m->hash); - return hash_value_bytes (h); -} - -always_inline uword -mhash_elts (mhash_t * m) -{ - return hash_elts (m->hash); -} - -always_inline uword -mhash_key_vector_is_heap (mhash_t * h) -{ - return h->n_key_bytes <= 1; -} - -always_inline void -mhash_free (mhash_t * h) -{ - if (mhash_key_vector_is_heap (h)) - heap_free (h->key_vector_or_heap); - else - vec_free (h->key_vector_or_heap); - vec_free (h->key_vector_free_indices); - hash_free (h->hash); -} - -#define mhash_foreach(k,v,mh,body) \ -do { \ - hash_pair_t * _mhash_foreach_p; \ - hash_foreach_pair (_mhash_foreach_p, (mh)->hash, ({ \ - (k) = mhash_key_to_mem ((mh), _mhash_foreach_p->key); \ - (v) = &_mhash_foreach_p->value[0]; \ - body; \ - })); \ -} while (0) - -format_function_t format_mhash_key; - -#endif /* included_clib_mhash_h */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |