+++ /dev/null
-/**************************************************************************
- *
- * 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.
- *
- **************************************************************************/
-
-/**
- * Key lookup/associative container.
- *
- * Like Jose's util_hash_table, based on CSO cache code for now.
- *
- * Author: Brian Paul
- */
-
-
-#include "pipe/p_compiler.h"
-#include "util/u_debug.h"
-
-#include "cso_cache/cso_hash.h"
-
-#include "util/u_memory.h"
-#include "util/u_keymap.h"
-
-
-struct keymap
-{
- struct cso_hash *cso;
- unsigned key_size;
- unsigned max_entries; /* XXX not obeyed net */
- unsigned num_entries;
- keymap_delete_func delete_func;
-};
-
-
-struct keymap_item
-{
- void *key, *value;
-};
-
-
-/**
- * This the default key-delete function used when the client doesn't
- * provide one.
- */
-static void
-default_delete_func(const struct keymap *map,
- const void *key, void *data, void *user)
-{
- FREE((void*) data);
-}
-
-
-static inline struct keymap_item *
-hash_table_item(struct cso_hash_iter iter)
-{
- return (struct keymap_item *) cso_hash_iter_data(iter);
-}
-
-
-/**
- * Return 4-byte hash key for a block of bytes.
- */
-static unsigned
-hash(const void *key, unsigned keySize)
-{
- unsigned i, hash;
-
- keySize /= 4; /* convert from bytes to uints */
-
- hash = 0;
- for (i = 0; i < keySize; i++) {
- hash ^= (i + 1) * ((const unsigned *) key)[i];
- }
-
- /*hash = hash ^ (hash >> 11) ^ (hash >> 22);*/
-
- return hash;
-}
-
-
-/**
- * Create a new map.
- * \param keySize size of the keys in bytes
- * \param maxEntries max number of entries to allow (~0 = infinity)
- * \param deleteFunc optional callback to call when entries
- * are deleted/replaced
- */
-struct keymap *
-util_new_keymap(unsigned keySize, unsigned maxEntries,
- keymap_delete_func deleteFunc)
-{
- struct keymap *map = MALLOC_STRUCT(keymap);
- if (!map)
- return NULL;
-
- map->cso = cso_hash_create();
- if (!map->cso) {
- FREE(map);
- return NULL;
- }
-
- map->max_entries = maxEntries;
- map->num_entries = 0;
- map->key_size = keySize;
- map->delete_func = deleteFunc ? deleteFunc : default_delete_func;
-
- return map;
-}
-
-
-/**
- * Delete/free a keymap and all entries. The deleteFunc that was given at
- * create time will be called for each entry.
- * \param user user-provided pointer passed through to the delete callback
- */
-void
-util_delete_keymap(struct keymap *map, void *user)
-{
- util_keymap_remove_all(map, user);
- cso_hash_delete(map->cso);
- FREE(map);
-}
-
-
-static inline struct cso_hash_iter
-hash_table_find_iter(const struct keymap *map, const void *key,
- unsigned key_hash)
-{
- struct cso_hash_iter iter;
- struct keymap_item *item;
-
- iter = cso_hash_find(map->cso, key_hash);
- while (!cso_hash_iter_is_null(iter)) {
- item = (struct keymap_item *) cso_hash_iter_data(iter);
- if (!memcmp(item->key, key, map->key_size))
- break;
- iter = cso_hash_iter_next(iter);
- }
-
- return iter;
-}
-
-
-static inline struct keymap_item *
-hash_table_find_item(const struct keymap *map, const void *key,
- unsigned key_hash)
-{
- struct cso_hash_iter iter = hash_table_find_iter(map, key, key_hash);
- if (cso_hash_iter_is_null(iter)) {
- return NULL;
- }
- else {
- return hash_table_item(iter);
- }
-}
-
-
-/**
- * Insert a new key + data pointer into the table.
- * Note: we create a copy of the key, but not the data!
- * If the key is already present in the table, replace the existing
- * entry (calling the delete callback on the previous entry).
- * If the maximum capacity of the map is reached an old entry
- * will be deleted (the delete callback will be called).
- */
-boolean
-util_keymap_insert(struct keymap *map, const void *key,
- const void *data, void *user)
-{
- unsigned key_hash;
- struct keymap_item *item;
- struct cso_hash_iter iter;
-
- assert(map);
- if (!map)
- return FALSE;
-
- key_hash = hash(key, map->key_size);
-
- item = hash_table_find_item(map, key, key_hash);
- if (item) {
- /* call delete callback for old entry/item */
- map->delete_func(map, item->key, item->value, user);
- item->value = (void *) data;
- return TRUE;
- }
-
- item = MALLOC_STRUCT(keymap_item);
- if (!item)
- return FALSE;
-
- item->key = mem_dup(key, map->key_size);
- item->value = (void *) data;
-
- iter = cso_hash_insert(map->cso, key_hash, item);
- if (cso_hash_iter_is_null(iter)) {
- FREE(item);
- return FALSE;
- }
-
- map->num_entries++;
-
- return TRUE;
-}
-
-
-/**
- * Look up a key in the map and return the associated data pointer.
- */
-const void *
-util_keymap_lookup(const struct keymap *map, const void *key)
-{
- unsigned key_hash;
- struct keymap_item *item;
-
- assert(map);
- if (!map)
- return NULL;
-
- key_hash = hash(key, map->key_size);
-
- item = hash_table_find_item(map, key, key_hash);
- if (!item)
- return NULL;
-
- return item->value;
-}
-
-
-/**
- * Remove an entry from the map.
- * The delete callback will be called if the given key/entry is found.
- * \param user passed to the delete callback as the last param.
- */
-void
-util_keymap_remove(struct keymap *map, const void *key, void *user)
-{
- unsigned key_hash;
- struct cso_hash_iter iter;
- struct keymap_item *item;
-
- assert(map);
- if (!map)
- return;
-
- key_hash = hash(key, map->key_size);
-
- iter = hash_table_find_iter(map, key, key_hash);
- if (cso_hash_iter_is_null(iter))
- return;
-
- item = hash_table_item(iter);
- assert(item);
- if (!item)
- return;
- map->delete_func(map, item->key, item->value, user);
- FREE(item->key);
- FREE(item);
-
- map->num_entries--;
-
- cso_hash_erase(map->cso, iter);
-}
-
-
-/**
- * Remove all entries from the map, calling the delete callback for each.
- * \param user passed to the delete callback as the last param.
- */
-void
-util_keymap_remove_all(struct keymap *map, void *user)
-{
- struct cso_hash_iter iter;
- struct keymap_item *item;
-
- assert(map);
- if (!map)
- return;
-
- iter = cso_hash_first_node(map->cso);
- while (!cso_hash_iter_is_null(iter)) {
- item = (struct keymap_item *)
- cso_hash_take(map->cso, cso_hash_iter_key(iter));
- map->delete_func(map, item->key, item->value, user);
- FREE(item->key);
- FREE(item);
- iter = cso_hash_first_node(map->cso);
- }
-}
-
-
-extern void
-util_keymap_info(const struct keymap *map)
-{
- debug_printf("Keymap %p: %u of max %u entries\n",
- (void *) map, map->num_entries, map->max_entries);
-}
+++ /dev/null
-/**************************************************************************
- *
- * 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.
- *
- **************************************************************************/
-
-#ifndef U_KEYMAP_H
-#define U_KEYMAP_H
-
-#include "pipe/p_compiler.h"
-
-
-/** opaque keymap type */
-struct keymap;
-
-
-/** Delete/callback function type */
-typedef void (*keymap_delete_func)(const struct keymap *map,
- const void *key, void *data,
- void *user);
-
-
-extern struct keymap *
-util_new_keymap(unsigned keySize, unsigned maxEntries,
- keymap_delete_func deleteFunc);
-
-extern void
-util_delete_keymap(struct keymap *map, void *user);
-
-extern boolean
-util_keymap_insert(struct keymap *map, const void *key,
- const void *data, void *user);
-
-extern const void *
-util_keymap_lookup(const struct keymap *map, const void *key);
-
-extern void
-util_keymap_remove(struct keymap *map, const void *key, void *user);
-
-extern void
-util_keymap_remove_all(struct keymap *map, void *user);
-
-extern void
-util_keymap_info(const struct keymap *map);
-
-
-#endif /* U_KEYMAP_H */
projects / mesa.git / commitdiff