mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
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gallium: Simple and efficient cache.
Fixed size hash table. Collisions are handled by simply destroying the previous entry. It hasn't received much testing yet.
This commit is contained in:
José Fonseca
parent
030a7a320c
commit
b901e1f212
6 changed files with 476 additions and 0 deletions
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@ -6,10 +6,12 @@ LIBNAME = util
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C_SOURCES = \
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p_debug.c \
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u_blit.c \
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u_cache.c \
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u_draw_quad.c \
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u_gen_mipmap.c \
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u_handle_table.c \
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u_hash_table.c \
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u_hash.c \
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u_math.c \
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u_mm.c \
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u_rect.c \
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@ -7,9 +7,11 @@ util = env.ConvenienceLibrary(
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'p_debug_mem.c',
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'p_debug_prof.c',
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'u_blit.c',
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'u_cache.c',
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'u_draw_quad.c',
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'u_gen_mipmap.c',
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'u_handle_table.c',
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'u_hash.c',
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'u_hash_table.c',
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'u_math.c',
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'u_mm.c',
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209
src/gallium/auxiliary/util/u_cache.c
Normal file
209
src/gallium/auxiliary/util/u_cache.c
Normal file
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@ -0,0 +1,209 @@
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/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
|
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* Simple cache implementation.
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*
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* We simply have fixed size array, and destroy previous values on collision.
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*
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#include "pipe/p_compiler.h"
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#include "pipe/p_debug.h"
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#include "util/u_math.h"
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#include "util/u_memory.h"
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#include "util/u_cache.h"
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struct util_cache_entry
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{
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void *key;
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void *value;
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#ifdef DEBUG
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unsigned count;
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#endif
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};
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struct util_cache
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{
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/** Hash function */
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uint32_t (*hash)(void *key);
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/** Compare two keys */
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int (*compare)(void *key1, void *key2);
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/** Destroy a (key, value) pair */
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void (*destroy)(void *key, void *value);
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uint32_t size;
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struct util_cache_entry *entries;
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#ifdef DEBUG
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unsigned count;
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#endif
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};
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struct util_cache *
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util_cache_create(uint32_t (*hash)(void *key),
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int (*compare)(void *key1, void *key2),
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void (*destroy)(void *key, void *value),
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uint32_t size)
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{
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struct util_cache *cache;
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cache = CALLOC_STRUCT(util_cache);
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if(!cache)
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return NULL;
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cache->hash = hash;
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cache->compare = compare;
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cache->destroy = destroy;
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cache->size = size;
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cache->entries = CALLOC(size, sizeof(struct util_cache_entry));
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if(!cache->entries) {
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FREE(cache);
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return NULL;
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}
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return cache;
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}
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static INLINE struct util_cache_entry *
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util_cache_entry_get(struct util_cache *cache,
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void *key)
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{
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uint32_t hash;
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hash = cache->hash(key);
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return &cache->entries[hash % cache->size];
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}
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static INLINE void
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util_cache_entry_destroy(struct util_cache *cache,
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struct util_cache_entry *entry)
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{
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void *key = entry->key;
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void *value = entry->value;
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entry->key = NULL;
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entry->value = NULL;
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if(key || value)
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if(cache->destroy)
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cache->destroy(key, value);
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}
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void
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util_cache_set(struct util_cache *cache,
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void *key,
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void *value)
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{
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struct util_cache_entry *entry;
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assert(cache);
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entry = util_cache_entry_get(cache, key);
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util_cache_entry_destroy(cache, entry);
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#ifdef DEBUG
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++entry->count;
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++cache->count;
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#endif
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entry->key = key;
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entry->value = value;
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}
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void *
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util_cache_get(struct util_cache *cache,
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void *key)
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{
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struct util_cache_entry *entry;
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assert(cache);
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entry = util_cache_entry_get(cache, key);
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if(!entry->key && !entry->value)
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return NULL;
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if(cache->compare(key, entry->key) != 0)
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return NULL;
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return entry->value;
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}
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void
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util_cache_clear(struct util_cache *cache)
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{
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uint32_t i;
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assert(cache);
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for(i = 0; i < cache->size; ++i)
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util_cache_entry_destroy(cache, &cache->entries[i]);
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}
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void
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util_cache_destroy(struct util_cache *cache)
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{
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assert(cache);
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#ifdef DEBUG
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if(cache->count >= 20*cache->size) {
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/* Normal approximation of the Poisson distribution */
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double mean = (double)cache->count/(double)cache->size;
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double stddev = sqrt(mean);
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unsigned i;
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for(i = 0; i < cache->size; ++i) {
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double z = fabs(cache->count - mean)/stddev;
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/* This assert should not fail 99.9999998027% of the times, unless
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* the hash function is a poor one */
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assert(z <= 6.0);
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}
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}
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#endif
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util_cache_clear(cache);
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FREE(cache->entries);
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FREE(cache);
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}
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87
src/gallium/auxiliary/util/u_cache.h
Normal file
87
src/gallium/auxiliary/util/u_cache.h
Normal file
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@ -0,0 +1,87 @@
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/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* Simple cache.
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*
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#ifndef U_CACHE_H_
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#define U_CACHE_H_
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#include "pipe/p_compiler.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Least Recently Used (LRU) cache.
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*/
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struct util_cache;
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/**
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* Create a cache.
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*
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* @param hash hash function
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* @param compare should return 0 for two equal keys
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* @param destroy destruction callback (optional)
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* @param size maximum number of entries
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*/
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struct util_cache *
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util_cache_create(uint32_t (*hash)(void *key),
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int (*compare)(void *key1, void *key2),
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void (*destroy)(void *key, void *value),
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uint32_t size);
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void
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util_cache_set(struct util_cache *cache,
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void *key,
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void *value);
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void *
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util_cache_get(struct util_cache *cache,
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void *key);
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void
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util_cache_clear(struct util_cache *cache);
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void
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util_cache_destroy(struct util_cache *cache);
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#ifdef __cplusplus
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}
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#endif
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#endif /* U_CACHE_H_ */
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121
src/gallium/auxiliary/util/u_hash.c
Normal file
121
src/gallium/auxiliary/util/u_hash.c
Normal file
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@ -0,0 +1,121 @@
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/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* Hash functions implementation.
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*
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* @author Jose Fonseca
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*/
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#include "u_hash.h"
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static uint32_t
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util_crc32_table[256] = {
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0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
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0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
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0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
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0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
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0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
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0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
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0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
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0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
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0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
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0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
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0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
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0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
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0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
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0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
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0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
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0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
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0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
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0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
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0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
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0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
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0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
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0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
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0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
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0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
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0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
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0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
|
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0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
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0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
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0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
|
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0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
|
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0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
|
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0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
|
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0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
|
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0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
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0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
|
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0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
|
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0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
|
||||
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
|
||||
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
|
||||
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
|
||||
0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
|
||||
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
|
||||
0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
|
||||
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
|
||||
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
|
||||
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
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0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
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0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
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0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
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0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
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||||
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
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||||
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
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0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
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0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
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0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
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0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
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||||
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
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||||
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
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0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
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||||
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
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0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
|
||||
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
|
||||
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* @sa http://www.w3.org/TR/PNG/#D-CRCAppendix
|
||||
*/
|
||||
uint32_t
|
||||
util_hash_crc32(void *data, size_t size)
|
||||
{
|
||||
uint8_t *p = (uint8_t *)data;
|
||||
uint32_t crc = 0xffffffff;
|
||||
|
||||
while (size--)
|
||||
crc = util_crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
|
||||
|
||||
return crc;
|
||||
}
|
||||
55
src/gallium/auxiliary/util/u_hash.h
Normal file
55
src/gallium/auxiliary/util/u_hash.h
Normal file
|
|
@ -0,0 +1,55 @@
|
|||
/**************************************************************************
|
||||
*
|
||||
* Copyright 2008 VMware, Inc.
|
||||
* All Rights Reserved.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a
|
||||
* copy of this software and associated documentation files (the
|
||||
* "Software"), to deal in the Software without restriction, including
|
||||
* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sub license, and/or sell copies of the Software, and to
|
||||
* permit persons to whom the Software is furnished to do so, subject to
|
||||
* the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice (including the
|
||||
* next paragraph) shall be included in all copies or substantial portions
|
||||
* of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
|
||||
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
|
||||
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
||||
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
||||
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
*
|
||||
**************************************************************************/
|
||||
|
||||
/**
|
||||
* @file
|
||||
* Hash functions.
|
||||
*
|
||||
* @author Jose Fonseca <jfonseca@vmware.com>
|
||||
*/
|
||||
|
||||
#ifndef U_HASH_H_
|
||||
#define U_HASH_H_
|
||||
|
||||
|
||||
#include "pipe/p_compiler.h"
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
uint32_t
|
||||
util_hash_crc32(void *data, size_t size);
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* U_HASH_H_ */
|
||||
Loading…
Add table
Reference in a new issue