forked from KolibriOS/kolibrios
323 lines
8.7 KiB
C
323 lines
8.7 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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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 TUNGSTEN GRAPHICS 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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/* Authors: Zack Rusin <zack@tungstengraphics.com>
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*/
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#include "util/u_debug.h"
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#include "util/u_memory.h"
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#include "cso_cache.h"
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#include "cso_hash.h"
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struct cso_cache {
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struct cso_hash *hashes[CSO_CACHE_MAX];
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int max_size;
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cso_sanitize_callback sanitize_cb;
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void *sanitize_data;
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};
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#if 1
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static unsigned hash_key(const void *key, unsigned key_size)
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{
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unsigned *ikey = (unsigned *)key;
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unsigned hash = 0, i;
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assert(key_size % 4 == 0);
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/* I'm sure this can be improved on:
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*/
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for (i = 0; i < key_size/4; i++)
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hash ^= ikey[i];
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return hash;
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}
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#else
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static unsigned hash_key(const unsigned char *p, int n)
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{
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unsigned h = 0;
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unsigned g;
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while (n--) {
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h = (h << 4) + *p++;
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if ((g = (h & 0xf0000000)) != 0)
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h ^= g >> 23;
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h &= ~g;
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}
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return h;
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}
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#endif
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unsigned cso_construct_key(void *item, int item_size)
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{
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return hash_key((item), item_size);
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}
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static INLINE struct cso_hash *_cso_hash_for_type(struct cso_cache *sc, enum cso_cache_type type)
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{
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struct cso_hash *hash;
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hash = sc->hashes[type];
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return hash;
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}
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static void delete_blend_state(void *state, void *data)
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{
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struct cso_blend *cso = (struct cso_blend *)state;
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if (cso->delete_state)
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cso->delete_state(cso->context, cso->data);
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FREE(state);
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}
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static void delete_depth_stencil_state(void *state, void *data)
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{
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struct cso_depth_stencil_alpha *cso = (struct cso_depth_stencil_alpha *)state;
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if (cso->delete_state)
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cso->delete_state(cso->context, cso->data);
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FREE(state);
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}
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static void delete_sampler_state(void *state, void *data)
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{
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struct cso_sampler *cso = (struct cso_sampler *)state;
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if (cso->delete_state)
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cso->delete_state(cso->context, cso->data);
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FREE(state);
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}
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static void delete_rasterizer_state(void *state, void *data)
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{
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struct cso_rasterizer *cso = (struct cso_rasterizer *)state;
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if (cso->delete_state)
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cso->delete_state(cso->context, cso->data);
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FREE(state);
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}
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static void delete_velements(void *state, void *data)
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{
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struct cso_velements *cso = (struct cso_velements *)state;
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if (cso->delete_state)
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cso->delete_state(cso->context, cso->data);
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FREE(state);
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}
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static INLINE void delete_cso(void *state, enum cso_cache_type type)
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{
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switch (type) {
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case CSO_BLEND:
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delete_blend_state(state, 0);
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break;
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case CSO_SAMPLER:
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delete_sampler_state(state, 0);
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break;
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case CSO_DEPTH_STENCIL_ALPHA:
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delete_depth_stencil_state(state, 0);
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break;
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case CSO_RASTERIZER:
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delete_rasterizer_state(state, 0);
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break;
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case CSO_VELEMENTS:
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delete_velements(state, 0);
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break;
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default:
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assert(0);
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FREE(state);
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}
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}
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static INLINE void sanitize_hash(struct cso_cache *sc,
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struct cso_hash *hash,
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enum cso_cache_type type,
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int max_size)
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{
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if (sc->sanitize_cb)
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sc->sanitize_cb(hash, type, max_size, sc->sanitize_data);
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}
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static INLINE void sanitize_cb(struct cso_hash *hash, enum cso_cache_type type,
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int max_size, void *user_data)
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{
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/* if we're approach the maximum size, remove fourth of the entries
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* otherwise every subsequent call will go through the same */
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int hash_size = cso_hash_size(hash);
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int max_entries = (max_size > hash_size) ? max_size : hash_size;
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int to_remove = (max_size < max_entries) * max_entries/4;
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if (hash_size > max_size)
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to_remove += hash_size - max_size;
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while (to_remove) {
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/*remove elements until we're good */
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/*fixme: currently we pick the nodes to remove at random*/
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struct cso_hash_iter iter = cso_hash_first_node(hash);
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void *cso = cso_hash_take(hash, cso_hash_iter_key(iter));
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delete_cso(cso, type);
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--to_remove;
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}
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}
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struct cso_hash_iter
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cso_insert_state(struct cso_cache *sc,
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unsigned hash_key, enum cso_cache_type type,
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void *state)
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{
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struct cso_hash *hash = _cso_hash_for_type(sc, type);
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sanitize_hash(sc, hash, type, sc->max_size);
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return cso_hash_insert(hash, hash_key, state);
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}
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struct cso_hash_iter
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cso_find_state(struct cso_cache *sc,
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unsigned hash_key, enum cso_cache_type type)
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{
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struct cso_hash *hash = _cso_hash_for_type(sc, type);
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return cso_hash_find(hash, hash_key);
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}
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void *cso_hash_find_data_from_template( struct cso_hash *hash,
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unsigned hash_key,
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void *templ,
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int size )
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{
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struct cso_hash_iter iter = cso_hash_find(hash, hash_key);
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while (!cso_hash_iter_is_null(iter)) {
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void *iter_data = cso_hash_iter_data(iter);
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if (!memcmp(iter_data, templ, size)) {
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/* We found a match
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*/
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return iter_data;
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}
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iter = cso_hash_iter_next(iter);
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}
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return NULL;
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}
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struct cso_hash_iter cso_find_state_template(struct cso_cache *sc,
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unsigned hash_key, enum cso_cache_type type,
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void *templ, unsigned size)
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{
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struct cso_hash_iter iter = cso_find_state(sc, hash_key, type);
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while (!cso_hash_iter_is_null(iter)) {
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void *iter_data = cso_hash_iter_data(iter);
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if (!memcmp(iter_data, templ, size))
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return iter;
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iter = cso_hash_iter_next(iter);
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}
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return iter;
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}
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void * cso_take_state(struct cso_cache *sc,
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unsigned hash_key, enum cso_cache_type type)
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{
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struct cso_hash *hash = _cso_hash_for_type(sc, type);
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return cso_hash_take(hash, hash_key);
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}
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struct cso_cache *cso_cache_create(void)
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{
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struct cso_cache *sc = MALLOC_STRUCT(cso_cache);
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int i;
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if (sc == NULL)
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return NULL;
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sc->max_size = 4096;
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for (i = 0; i < CSO_CACHE_MAX; i++)
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sc->hashes[i] = cso_hash_create();
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sc->sanitize_cb = sanitize_cb;
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sc->sanitize_data = 0;
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return sc;
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}
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void cso_for_each_state(struct cso_cache *sc, enum cso_cache_type type,
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cso_state_callback func, void *user_data)
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{
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struct cso_hash *hash = _cso_hash_for_type(sc, type);
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struct cso_hash_iter iter;
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iter = cso_hash_first_node(hash);
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while (!cso_hash_iter_is_null(iter)) {
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void *state = cso_hash_iter_data(iter);
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iter = cso_hash_iter_next(iter);
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if (state) {
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func(state, user_data);
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}
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}
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}
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void cso_cache_delete(struct cso_cache *sc)
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{
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int i;
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assert(sc);
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if (!sc)
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return;
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/* delete driver data */
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cso_for_each_state(sc, CSO_BLEND, delete_blend_state, 0);
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cso_for_each_state(sc, CSO_DEPTH_STENCIL_ALPHA, delete_depth_stencil_state, 0);
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cso_for_each_state(sc, CSO_RASTERIZER, delete_rasterizer_state, 0);
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cso_for_each_state(sc, CSO_SAMPLER, delete_sampler_state, 0);
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cso_for_each_state(sc, CSO_VELEMENTS, delete_velements, 0);
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for (i = 0; i < CSO_CACHE_MAX; i++)
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cso_hash_delete(sc->hashes[i]);
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FREE(sc);
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}
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void cso_set_maximum_cache_size(struct cso_cache *sc, int number)
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{
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int i;
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sc->max_size = number;
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for (i = 0; i < CSO_CACHE_MAX; i++)
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sanitize_hash(sc, sc->hashes[i], i, sc->max_size);
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}
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int cso_maximum_cache_size(const struct cso_cache *sc)
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{
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return sc->max_size;
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}
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void cso_cache_set_sanitize_callback(struct cso_cache *sc,
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cso_sanitize_callback cb,
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void *user_data)
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{
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sc->sanitize_cb = cb;
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sc->sanitize_data = user_data;
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}
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