Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2017 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:
       6             :  *
       7             :  *     http://www.apache.org/licenses/LICENSE-2.0
       8             :  *
       9             :  * Unless required by applicable law or agreed to in writing, software
      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.
      14             :  */
      15             : #undef BIHASH_TYPE
      16             : #undef BIHASH_KVP_PER_PAGE
      17             : #undef BIHASH_32_64_SVM
      18             : #undef BIHASH_ENABLE_STATS
      19             : #undef BIHASH_KVP_AT_BUCKET_LEVEL
      20             : #undef BIHASH_LAZY_INSTANTIATE
      21             : #undef BIHASH_BUCKET_PREFETCH_CACHE_LINES
      22             : 
      23             : #define BIHASH_TYPE _vec8_8
      24             : #define BIHASH_KVP_PER_PAGE 4
      25             : #define BIHASH_KVP_AT_BUCKET_LEVEL 0
      26             : #define BIHASH_LAZY_INSTANTIATE 1
      27             : #define BIHASH_BUCKET_PREFETCH_CACHE_LINES 1
      28             : 
      29             : #ifndef __included_bihash_vec8_8_h__
      30             : #define __included_bihash_vec8_8_h__
      31             : 
      32             : #include <vppinfra/heap.h>
      33             : #include <vppinfra/format.h>
      34             : #include <vppinfra/pool.h>
      35             : #include <vppinfra/xxhash.h>
      36             : #include <vppinfra/crc32.h>
      37             : 
      38             : /** 8 octet key, 8 octet key value pair */
      39             : typedef struct
      40             : {
      41             :   u64 key;                      /**< the key */
      42             :   u64 value;                    /**< the value */
      43             : } clib_bihash_kv_vec8_8_t;
      44             : 
      45             : static inline void
      46           0 : clib_bihash_mark_free_vec8_8 (clib_bihash_kv_vec8_8_t *v)
      47             : {
      48           0 :   v->value = 0xFEEDFACE8BADF00DULL;
      49           0 : }
      50             : 
      51             : /** Decide if a clib_bihash_kv_vec8_8_t instance is free
      52             :     @param v- pointer to the (key,value) pair
      53             : */
      54             : static inline int
      55           0 : clib_bihash_is_free_vec8_8 (clib_bihash_kv_vec8_8_t * v)
      56             : {
      57           0 :   if (v->value == 0xFEEDFACE8BADF00DULL)
      58           0 :     return 1;
      59           0 :   return 0;
      60             : }
      61             : 
      62             : /** Hash a clib_bihash_kv_vec8_8_t instance
      63             :     @param v - pointer to the (key,value) pair, hash the key (only)
      64             : */
      65             : static inline u64
      66           0 : clib_bihash_hash_vec8_8 (clib_bihash_kv_vec8_8_t * v)
      67             : {
      68           0 :   u8 *keyp = (u8 *) (v->key);
      69             :   /* Note: to torture-test linear scan, make this fn return a constant */
      70             : #ifdef clib_crc32c_uses_intrinsics
      71           0 :   return clib_crc32c (keyp, vec_len (keyp));
      72             : #else
      73             :   {
      74             :     int i, j;
      75             :     u64 sum = 0;
      76             : 
      77             :     for (i = 0, j = 0; i < vec_len (keyp); i++)
      78             :       {
      79             :         sum ^= keyp[i] << (j * 8);
      80             :         j++;
      81             :         if (j == 4)
      82             :           j = 0;
      83             :       }
      84             : 
      85             :     return clib_xxhash (sum);
      86             :   }
      87             : #endif
      88             : }
      89             : 
      90             : /** Format a clib_bihash_kv_vec8_8_t instance
      91             :     @param s - u8 * vector under construction
      92             :     @param args (vararg) - the (key,value) pair to format
      93             :     @return s - the u8 * vector under construction
      94             : */
      95             : static inline u8 *
      96           0 : format_bihash_kvp_vec8_8 (u8 * s, va_list * args)
      97             : {
      98           0 :   clib_bihash_kv_vec8_8_t *v = va_arg (*args, clib_bihash_kv_vec8_8_t *);
      99             : 
     100           0 :   s = format (s, "key %U value %llu",
     101           0 :               format_hex_bytes, v->key, vec_len ((u8 *) (v->key)), v->value);
     102           0 :   return s;
     103             : }
     104             : 
     105             : /** Compare two clib_bihash_kv_vec8_8_t instances
     106             :     @param a - first key
     107             :     @param b - second key
     108             : */
     109             : static inline int
     110           0 : clib_bihash_key_compare_vec8_8 (u64 a_arg, u64 b_arg)
     111             : {
     112           0 :   u8 *a = (u8 *) a_arg;
     113           0 :   u8 *b = (u8 *) b_arg;
     114             : 
     115           0 :   if (a_arg == ~0ULL || b_arg == ~0ULL)
     116           0 :     return 0;
     117             : 
     118           0 :   if (vec_len (a) != vec_len (b))
     119           0 :     return 0;
     120             : 
     121           0 :   return memcmp (a, b, vec_len (a)) == 0;
     122             : }
     123             : 
     124             : #undef __included_bihash_template_h__
     125             : #include <vppinfra/bihash_template.h>
     126             : 
     127             : #endif /* __included_bihash_vec8_8_h__ */
     128             : 
     129             : /*
     130             :  * fd.io coding-style-patch-verification: ON
     131             :  *
     132             :  * Local Variables:
     133             :  * eval: (c-set-style "gnu")
     134             :  * End:
     135             :  */