C++ (Cpp) my_calc_hash Examples

Example #1

File: mrn_table.cpp Project: myokoym/mroonga

TABLE_SHARE *mrn_get_table_share(TABLE_LIST *table_list, int *error)
{
  uint key_length;
  TABLE_SHARE *share;
  THD *thd = current_thd;
  MRN_DBUG_ENTER_FUNCTION();
#ifdef MRN_HAVE_GET_TABLE_DEF_KEY
  const char *key;
  key_length = get_table_def_key(table_list, &key);
#else
  char key[MAX_DBKEY_LENGTH];
  key_length = create_table_def_key(thd, key, table_list, FALSE);
#endif
#ifdef MRN_HAVE_TABLE_DEF_CACHE
  my_hash_value_type hash_value;
  hash_value = my_calc_hash(mrn_table_def_cache, (uchar*) key, key_length);
  share = get_table_share(thd, table_list, key, key_length, 0, error,
                          hash_value);
#elif defined(MRN_HAVE_TDC_ACQUIRE_SHARE)
  share = tdc_acquire_share(thd, table_list->db, table_list->table_name, key,
                            key_length,
                            table_list->mdl_request.key.tc_hash_value(),
                            GTS_TABLE, NULL);
#else
  share = get_table_share(thd, table_list, key, key_length, 0, error);
#endif
  DBUG_RETURN(share);
}

Example #2

File: extkeys.c Project: gracefullife/Hamster-DB-for-Android

ham_status_t
extkey_cache_insert(extkey_cache_t *cache, ham_offset_t blobid, 
            ham_size_t size, const ham_u8_t *data)
{
    ham_size_t h=my_calc_hash(cache, blobid);
    extkey_t *e;
    ham_db_t *db=extkey_cache_get_db(cache);
	ham_env_t *env = db_get_env(db);

    /*
     * DEBUG build: make sure that the item is not inserted twice!
     */
#ifdef HAM_DEBUG
    e=extkey_cache_get_bucket(cache, h);
    while (e) {
        ham_assert(extkey_get_blobid(e)!=blobid, (0));
        e=extkey_get_next(e);
    }
#endif

    e=(extkey_t *)allocator_alloc(env_get_allocator(env), SIZEOF_EXTKEY_T+size);
    if (!e)
        return HAM_OUT_OF_MEMORY;
    extkey_set_blobid(e, blobid);
    extkey_set_txn_id(e, env_get_txn_id(env));
    extkey_set_next(e, extkey_cache_get_bucket(cache, h));
    extkey_set_size(e, size);
    memcpy(extkey_get_data(e), data, size);

    extkey_cache_set_bucket(cache, h, e);
    extkey_cache_set_usedsize(cache, extkey_cache_get_usedsize(cache)+size);

    return (0);
}

Example #3

File: extkeys.c Project: gracefullife/Hamster-DB-for-Android

ham_status_t
extkey_cache_remove(extkey_cache_t *cache, ham_offset_t blobid)
{
	ham_db_t *db=extkey_cache_get_db(cache);
	ham_env_t *env = db_get_env(db);
    ham_size_t h=my_calc_hash(cache, blobid);
    extkey_t *e, *prev=0;

    e=extkey_cache_get_bucket(cache, h);
    while (e) {
        if (extkey_get_blobid(e)==blobid)
            break;
        prev=e;
        e=extkey_get_next(e);
    }

    if (!e)
        return (HAM_KEY_NOT_FOUND);

    if (prev)
        extkey_set_next(prev, extkey_get_next(e));
    else
        extkey_cache_set_bucket(cache, h, extkey_get_next(e));

    extkey_cache_set_usedsize(cache, 
            extkey_cache_get_usedsize(cache)-extkey_get_size(e));
    allocator_free(env_get_allocator(env), e);

    return (0);
}

Example #4

File: extkeys.c Project: gracefullife/Hamster-DB-for-Android

ham_status_t
extkey_cache_fetch(extkey_cache_t *cache, ham_offset_t blobid, 
            ham_size_t *size, ham_u8_t **data)
{
    ham_size_t h=my_calc_hash(cache, blobid);
    extkey_t *e;

    e=extkey_cache_get_bucket(cache, h);
    while (e) {
        if (extkey_get_blobid(e)==blobid)
            break;
        e=extkey_get_next(e);
    }

    if (!e)
        return (HAM_KEY_NOT_FOUND);

    *size=extkey_get_size(e);
    *data=extkey_get_data(e);
    extkey_set_txn_id(e, env_get_txn_id(db_get_env(extkey_cache_get_db(cache))));

    return (0);
}