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-rw-r--r--external/unbound/util/storage/slabhash.c231
1 files changed, 0 insertions, 231 deletions
diff --git a/external/unbound/util/storage/slabhash.c b/external/unbound/util/storage/slabhash.c
deleted file mode 100644
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--- a/external/unbound/util/storage/slabhash.c
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@@ -1,231 +0,0 @@
-/*
- * util/storage/slabhash.c - hashtable consisting of several smaller tables.
- *
- * Copyright (c) 2007, NLnet Labs. All rights reserved.
- *
- * This software is open source.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of the NLNET LABS nor the names of its contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/**
- * \file
- *
- * Implementation of hash table that consists of smaller hash tables.
- * This results in a partitioned lruhash table.
- * It cannot grow, but that gives it the ability to have multiple
- * locks. Also this means there are multiple LRU lists.
- */
-
-#include "config.h"
-#include "util/storage/slabhash.h"
-
-struct slabhash* slabhash_create(size_t numtables, size_t start_size,
- size_t maxmem, lruhash_sizefunc_type sizefunc,
- lruhash_compfunc_type compfunc, lruhash_delkeyfunc_type delkeyfunc,
- lruhash_deldatafunc_type deldatafunc, void* arg)
-{
- size_t i;
- struct slabhash* sl = (struct slabhash*)calloc(1,
- sizeof(struct slabhash));
- if(!sl) return NULL;
- sl->size = numtables;
- log_assert(sl->size > 0);
- sl->array = (struct lruhash**)calloc(sl->size, sizeof(struct lruhash*));
- if(!sl->array) {
- free(sl);
- return NULL;
- }
- sl->mask = (uint32_t)(sl->size - 1);
- if(sl->mask == 0) {
- sl->shift = 0;
- } else {
- log_assert( (sl->size & sl->mask) == 0
- /* size must be power of 2 */ );
- sl->shift = 0;
- while(!(sl->mask & 0x80000000)) {
- sl->mask <<= 1;
- sl->shift ++;
- }
- }
- for(i=0; i<sl->size; i++) {
- sl->array[i] = lruhash_create(start_size, maxmem / sl->size,
- sizefunc, compfunc, delkeyfunc, deldatafunc, arg);
- if(!sl->array[i]) {
- slabhash_delete(sl);
- return NULL;
- }
- }
- return sl;
-}
-
-void slabhash_delete(struct slabhash* sl)
-{
- if(!sl)
- return;
- if(sl->array) {
- size_t i;
- for(i=0; i<sl->size; i++)
- lruhash_delete(sl->array[i]);
- free(sl->array);
- }
- free(sl);
-}
-
-void slabhash_clear(struct slabhash* sl)
-{
- size_t i;
- if(!sl)
- return;
- for(i=0; i<sl->size; i++)
- lruhash_clear(sl->array[i]);
-}
-
-/** helper routine to calculate the slabhash index */
-static unsigned int
-slab_idx(struct slabhash* sl, hashvalue_type hash)
-{
- return ((hash & sl->mask) >> sl->shift);
-}
-
-void slabhash_insert(struct slabhash* sl, hashvalue_type hash,
- struct lruhash_entry* entry, void* data, void* arg)
-{
- lruhash_insert(sl->array[slab_idx(sl, hash)], hash, entry, data, arg);
-}
-
-struct lruhash_entry* slabhash_lookup(struct slabhash* sl,
- hashvalue_type hash, void* key, int wr)
-{
- return lruhash_lookup(sl->array[slab_idx(sl, hash)], hash, key, wr);
-}
-
-void slabhash_remove(struct slabhash* sl, hashvalue_type hash, void* key)
-{
- lruhash_remove(sl->array[slab_idx(sl, hash)], hash, key);
-}
-
-void slabhash_status(struct slabhash* sl, const char* id, int extended)
-{
- size_t i;
- char num[17];
- log_info("Slabhash %s: %u tables mask=%x shift=%d",
- id, (unsigned)sl->size, (unsigned)sl->mask, sl->shift);
- for(i=0; i<sl->size; i++) {
- snprintf(num, sizeof(num), "table %u", (unsigned)i);
- lruhash_status(sl->array[i], num, extended);
- }
-}
-
-size_t slabhash_get_size(struct slabhash* sl)
-{
- size_t i, total = 0;
- for(i=0; i<sl->size; i++) {
- lock_quick_lock(&sl->array[i]->lock);
- total += sl->array[i]->space_max;
- lock_quick_unlock(&sl->array[i]->lock);
- }
- return total;
-}
-
-size_t slabhash_get_mem(struct slabhash* sl)
-{
- size_t i, total = sizeof(*sl);
- total += sizeof(struct lruhash*)*sl->size;
- for(i=0; i<sl->size; i++) {
- total += lruhash_get_mem(sl->array[i]);
- }
- return total;
-}
-
-struct lruhash* slabhash_gettable(struct slabhash* sl, hashvalue_type hash)
-{
- return sl->array[slab_idx(sl, hash)];
-}
-
-/* test code, here to avoid linking problems with fptr_wlist */
-/** delete key */
-static void delkey(struct slabhash_testkey* k) {
- lock_rw_destroy(&k->entry.lock); free(k);}
-/** delete data */
-static void deldata(struct slabhash_testdata* d) {free(d);}
-
-size_t test_slabhash_sizefunc(void* ATTR_UNUSED(key), void* ATTR_UNUSED(data))
-{
- return sizeof(struct slabhash_testkey) +
- sizeof(struct slabhash_testdata);
-}
-
-int test_slabhash_compfunc(void* key1, void* key2)
-{
- struct slabhash_testkey* k1 = (struct slabhash_testkey*)key1;
- struct slabhash_testkey* k2 = (struct slabhash_testkey*)key2;
- if(k1->id == k2->id)
- return 0;
- if(k1->id > k2->id)
- return 1;
- return -1;
-}
-
-void test_slabhash_delkey(void* key, void* ATTR_UNUSED(arg))
-{
- delkey((struct slabhash_testkey*)key);
-}
-
-void test_slabhash_deldata(void* data, void* ATTR_UNUSED(arg))
-{
- deldata((struct slabhash_testdata*)data);
-}
-
-void slabhash_setmarkdel(struct slabhash* sl, lruhash_markdelfunc_type md)
-{
- size_t i;
- for(i=0; i<sl->size; i++) {
- lruhash_setmarkdel(sl->array[i], md);
- }
-}
-
-void slabhash_traverse(struct slabhash* sh, int wr,
- void (*func)(struct lruhash_entry*, void*), void* arg)
-{
- size_t i;
- for(i=0; i<sh->size; i++)
- lruhash_traverse(sh->array[i], wr, func, arg);
-}
-
-size_t count_slabhash_entries(struct slabhash* sh)
-{
- size_t slab, cnt = 0;
-
- for(slab=0; slab<sh->size; slab++) {
- lock_quick_lock(&sh->array[slab]->lock);
- cnt += sh->array[slab]->num;
- lock_quick_unlock(&sh->array[slab]->lock);
- }
- return cnt;
-}