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Diffstat (limited to 'external/unbound/util/storage/slabhash.c')
-rw-r--r-- | external/unbound/util/storage/slabhash.c | 231 |
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 index ae63b9772..000000000 --- a/external/unbound/util/storage/slabhash.c +++ /dev/null @@ -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; -} |