diff options
Diffstat (limited to 'lib/erl_interface/src/registry/hash_newtab.c')
| -rw-r--r-- | lib/erl_interface/src/registry/hash_newtab.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/lib/erl_interface/src/registry/hash_newtab.c b/lib/erl_interface/src/registry/hash_newtab.c new file mode 100644 index 0000000000..b900de1f69 --- /dev/null +++ b/lib/erl_interface/src/registry/hash_newtab.c @@ -0,0 +1,52 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 1998-2009. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights and limitations + * under the License. + * + * %CopyrightEnd% + * + + */ +#include <stdlib.h> +#include <string.h> +#include "hash.h" + +ei_hash *ei_hash_newtab(int tabsize) +{ + ei_hash *tab=NULL; + int bucketpos=sizeof(*tab); + + /* make sure size is odd, then increase until prime */ + tabsize |= 0x1; + while (!ei_isprime(tabsize)) tabsize +=2; + + /* we will only do one malloc, so "sizeof(*tab)" + * must be adjusted to align tab->tab properly + */ + ei_align(bucketpos); + + /* single malloc, then fill in all fields */ + if ((tab = malloc(bucketpos + (tabsize * (sizeof(*(tab->tab))))))) { + tab->tab = (ei_bucket **)((char *)tab + bucketpos); + memset(tab->tab,0,tabsize*sizeof(*(tab->tab))); + tab->hash = ei_dohash; + tab->size = tabsize; + tab->npos = 0; + tab->nelem = 0; + tab->freelist = NULL; + } + + return tab; +} + |