Used synchronise script to update files

1 files changed, 351 insertions, 351 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_cache.c b/mesalib/src/gallium/auxiliary/util/u_cache.c
index 215236818..df08ec302 100644
--- a/mesalib/src/gallium/auxiliary/util/u_cache.c
+++ b/mesalib/src/gallium/auxiliary/util/u_cache.c
@@ -1,351 +1,351 @@
-/**************************************************************************

- *

- * 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

- * Improved cache implementation.

- *

- * Fixed size array with linear probing on collision and LRU eviction

- * on full.

- * 

- * @author Jose Fonseca <jfonseca@vmware.com>

- */

-

-

-#include "pipe/p_compiler.h"

-#include "util/u_debug.h"

-

-#include "util/u_math.h"

-#include "util/u_memory.h"

-#include "util/u_cache.h"

-#include "util/u_simple_list.h"

-

-

-struct util_cache_entry

-{

-   enum { EMPTY = 0, FILLED, DELETED } state;

-   uint32_t hash;

-

-   struct util_cache_entry *next;

-   struct util_cache_entry *prev;

-

-   void *key;

-   void *value;

-   

-#ifdef DEBUG

-   unsigned count;

-#endif

-};

-

-

-struct util_cache

-{

-   /** Hash function */

-   uint32_t (*hash)(const void *key);

-   

-   /** Compare two keys */

-   int (*compare)(const void *key1, const void *key2);

-

-   /** Destroy a (key, value) pair */

-   void (*destroy)(void *key, void *value);

-

-   uint32_t size;

-   

-   struct util_cache_entry *entries;

-   

-   unsigned count;

-   struct util_cache_entry lru;

-};

-

-static void

-ensure_sanity(const struct util_cache *cache);

-

-#define CACHE_DEFAULT_ALPHA 2

-

-struct util_cache *

-util_cache_create(uint32_t (*hash)(const void *key),

-                  int (*compare)(const void *key1, const void *key2),

-                  void (*destroy)(void *key, void *value),

-                  uint32_t size)

-{

-   struct util_cache *cache;

-   

-   cache = CALLOC_STRUCT(util_cache);

-   if(!cache)

-      return NULL;

-   

-   cache->hash = hash;

-   cache->compare = compare;

-   cache->destroy = destroy;

-

-   make_empty_list(&cache->lru);

-

-   size *= CACHE_DEFAULT_ALPHA;

-   cache->size = size;

-   

-   cache->entries = CALLOC(size, sizeof(struct util_cache_entry));

-   if(!cache->entries) {

-      FREE(cache);

-      return NULL;

-   }

-   

-   ensure_sanity(cache);

-   return cache;

-}

-

-

-static struct util_cache_entry *

-util_cache_entry_get(struct util_cache *cache,

-                     uint32_t hash,

-                     const void *key)

-{

-   struct util_cache_entry *first_unfilled = NULL;

-   uint32_t index = hash % cache->size;

-   uint32_t probe;

-

-   /* Probe until we find either a matching FILLED entry or an EMPTY

-    * slot (which has never been occupied).

-    *

-    * Deleted or non-matching slots are not indicative of completion

-    * as a previous linear probe for the same key could have continued

-    * past this point.

-    */

-   for (probe = 0; probe < cache->size; probe++) {

-      uint32_t i = (index + probe) % cache->size;

-      struct util_cache_entry *current = &cache->entries[i];

-

-      if (current->state == FILLED) {

-         if (current->hash == hash &&

-             cache->compare(key, current->key) == 0)

-            return current;

-      }

-      else {

-         if (!first_unfilled)

-            first_unfilled = current;

-

-         if (current->state == EMPTY)

-            return first_unfilled;

-      }

-   }

-

-   return NULL;

-}

-

-static INLINE void

-util_cache_entry_destroy(struct util_cache *cache,

-                         struct util_cache_entry *entry)

-{

-   void *key = entry->key;

-   void *value = entry->value;

-   

-   entry->key = NULL;

-   entry->value = NULL;

-   

-   if (entry->state == FILLED) {

-      remove_from_list(entry);

-      cache->count--;

-

-      if(cache->destroy)

-         cache->destroy(key, value);

-

-      entry->state = DELETED;

-   }

-}

-

-

-void

-util_cache_set(struct util_cache *cache,

-               void *key,

-               void *value)

-{

-   struct util_cache_entry *entry;

-   uint32_t hash = cache->hash(key);

-

-   assert(cache);

-   if (!cache)

-      return;

-

-   entry = util_cache_entry_get(cache, hash, key);

-   if (!entry)

-      entry = cache->lru.prev;

-

-   if (cache->count >= cache->size / CACHE_DEFAULT_ALPHA)

-      util_cache_entry_destroy(cache, cache->lru.prev);

-

-   util_cache_entry_destroy(cache, entry);

-   

-#ifdef DEBUG

-   ++entry->count;

-#endif

-   

-   entry->key = key;

-   entry->hash = hash;

-   entry->value = value;

-   entry->state = FILLED;

-   insert_at_head(&cache->lru, entry);

-   cache->count++;

-

-   ensure_sanity(cache);

-}

-

-

-void *

-util_cache_get(struct util_cache *cache, 

-               const void *key)

-{

-   struct util_cache_entry *entry;

-   uint32_t hash = cache->hash(key);

-

-   assert(cache);

-   if (!cache)

-      return NULL;

-

-   entry = util_cache_entry_get(cache, hash, key);

-   if (!entry)

-      return NULL;

-

-   if (entry->state == FILLED)

-      move_to_head(&cache->lru, entry);

-   

-   return entry->value;

-}

-

-

-void 

-util_cache_clear(struct util_cache *cache)

-{

-   uint32_t i;

-

-   assert(cache);

-   if (!cache)

-      return;

-

-   for(i = 0; i < cache->size; ++i) {

-      util_cache_entry_destroy(cache, &cache->entries[i]);

-      cache->entries[i].state = EMPTY;

-   }

-

-   assert(cache->count == 0);

-   assert(is_empty_list(&cache->lru));

-   ensure_sanity(cache);

-}

-

-

-void

-util_cache_destroy(struct util_cache *cache)

-{

-   assert(cache);

-   if (!cache)

-      return;

-

-#ifdef DEBUG

-   if(cache->count >= 20*cache->size) {

-      /* Normal approximation of the Poisson distribution */

-      double mean = (double)cache->count/(double)cache->size;

-      double stddev = sqrt(mean);

-      unsigned i;

-      for(i = 0; i < cache->size; ++i) {

-         double z = fabs(cache->entries[i].count - mean)/stddev;

-         /* This assert should not fail 99.9999998027% of the times, unless 

-          * the hash function is a poor one */

-         assert(z <= 6.0);

-      }

-   }

-#endif

-      

-   util_cache_clear(cache);

-   

-   FREE(cache->entries);

-   FREE(cache);

-}

-

-

-void

-util_cache_remove(struct util_cache *cache,

-                  const void *key)

-{

-   struct util_cache_entry *entry;

-   uint32_t hash;

-

-   assert(cache);

-   if (!cache)

-      return;

-

-   hash = cache->hash(key);

-

-   entry = util_cache_entry_get(cache, hash, key);

-   if (!entry)

-      return;

-

-   if (entry->state == FILLED)

-      util_cache_entry_destroy(cache, entry);

-

-   ensure_sanity(cache);

-}

-

-

-static void

-ensure_sanity(const struct util_cache *cache)

-{

-#ifdef DEBUG

-   unsigned i, cnt = 0;

-

-   assert(cache);

-   for (i = 0; i < cache->size; i++) {

-      struct util_cache_entry *header = &cache->entries[i];

-

-      assert(header);

-      assert(header->state == FILLED ||

-             header->state == EMPTY ||

-             header->state == DELETED);

-      if (header->state == FILLED) {

-         cnt++;

-         assert(header->hash == cache->hash(header->key));

-      }

-   }

-

-   assert(cnt == cache->count);

-   assert(cache->size >= cnt);

-

-   if (cache->count == 0) {

-      assert (is_empty_list(&cache->lru));

-   }

-   else {

-      struct util_cache_entry *header = cache->lru.next;

-

-      assert (header);

-      assert (!is_empty_list(&cache->lru));

-

-      for (i = 0; i < cache->count; i++)

-         header = header->next;

-

-      assert(header == &cache->lru);

-   }

-#endif

-

-   (void)cache;

-}

+/**************************************************************************
+ *
+ * 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
+ * Improved cache implementation.
+ *
+ * Fixed size array with linear probing on collision and LRU eviction
+ * on full.
+ * 
+ * @author Jose Fonseca <jfonseca@vmware.com>
+ */
+
+
+#include "pipe/p_compiler.h"
+#include "util/u_debug.h"
+
+#include "util/u_math.h"
+#include "util/u_memory.h"
+#include "util/u_cache.h"
+#include "util/u_simple_list.h"
+
+
+struct util_cache_entry
+{
+   enum { EMPTY = 0, FILLED, DELETED } state;
+   uint32_t hash;
+
+   struct util_cache_entry *next;
+   struct util_cache_entry *prev;
+
+   void *key;
+   void *value;
+   
+#ifdef DEBUG
+   unsigned count;
+#endif
+};
+
+
+struct util_cache
+{
+   /** Hash function */
+   uint32_t (*hash)(const void *key);
+   
+   /** Compare two keys */
+   int (*compare)(const void *key1, const void *key2);
+
+   /** Destroy a (key, value) pair */
+   void (*destroy)(void *key, void *value);
+
+   uint32_t size;
+   
+   struct util_cache_entry *entries;
+   
+   unsigned count;
+   struct util_cache_entry lru;
+};
+
+static void
+ensure_sanity(const struct util_cache *cache);
+
+#define CACHE_DEFAULT_ALPHA 2
+
+struct util_cache *
+util_cache_create(uint32_t (*hash)(const void *key),
+                  int (*compare)(const void *key1, const void *key2),
+                  void (*destroy)(void *key, void *value),
+                  uint32_t size)
+{
+   struct util_cache *cache;
+   
+   cache = CALLOC_STRUCT(util_cache);
+   if(!cache)
+      return NULL;
+   
+   cache->hash = hash;
+   cache->compare = compare;
+   cache->destroy = destroy;
+
+   make_empty_list(&cache->lru);
+
+   size *= CACHE_DEFAULT_ALPHA;
+   cache->size = size;
+   
+   cache->entries = CALLOC(size, sizeof(struct util_cache_entry));
+   if(!cache->entries) {
+      FREE(cache);
+      return NULL;
+   }
+   
+   ensure_sanity(cache);
+   return cache;
+}
+
+
+static struct util_cache_entry *
+util_cache_entry_get(struct util_cache *cache,
+                     uint32_t hash,
+                     const void *key)
+{
+   struct util_cache_entry *first_unfilled = NULL;
+   uint32_t index = hash % cache->size;
+   uint32_t probe;
+
+   /* Probe until we find either a matching FILLED entry or an EMPTY
+    * slot (which has never been occupied).
+    *
+    * Deleted or non-matching slots are not indicative of completion
+    * as a previous linear probe for the same key could have continued
+    * past this point.
+    */
+   for (probe = 0; probe < cache->size; probe++) {
+      uint32_t i = (index + probe) % cache->size;
+      struct util_cache_entry *current = &cache->entries[i];
+
+      if (current->state == FILLED) {
+         if (current->hash == hash &&
+             cache->compare(key, current->key) == 0)
+            return current;
+      }
+      else {
+         if (!first_unfilled)
+            first_unfilled = current;
+
+         if (current->state == EMPTY)
+            return first_unfilled;
+      }
+   }
+
+   return NULL;
+}
+
+static INLINE void
+util_cache_entry_destroy(struct util_cache *cache,
+                         struct util_cache_entry *entry)
+{
+   void *key = entry->key;
+   void *value = entry->value;
+   
+   entry->key = NULL;
+   entry->value = NULL;
+   
+   if (entry->state == FILLED) {
+      remove_from_list(entry);
+      cache->count--;
+
+      if(cache->destroy)
+         cache->destroy(key, value);
+
+      entry->state = DELETED;
+   }
+}
+
+
+void
+util_cache_set(struct util_cache *cache,
+               void *key,
+               void *value)
+{
+   struct util_cache_entry *entry;
+   uint32_t hash = cache->hash(key);
+
+   assert(cache);
+   if (!cache)
+      return;
+
+   entry = util_cache_entry_get(cache, hash, key);
+   if (!entry)
+      entry = cache->lru.prev;
+
+   if (cache->count >= cache->size / CACHE_DEFAULT_ALPHA)
+      util_cache_entry_destroy(cache, cache->lru.prev);
+
+   util_cache_entry_destroy(cache, entry);
+   
+#ifdef DEBUG
+   ++entry->count;
+#endif
+   
+   entry->key = key;
+   entry->hash = hash;
+   entry->value = value;
+   entry->state = FILLED;
+   insert_at_head(&cache->lru, entry);
+   cache->count++;
+
+   ensure_sanity(cache);
+}
+
+
+void *
+util_cache_get(struct util_cache *cache, 
+               const void *key)
+{
+   struct util_cache_entry *entry;
+   uint32_t hash = cache->hash(key);
+
+   assert(cache);
+   if (!cache)
+      return NULL;
+
+   entry = util_cache_entry_get(cache, hash, key);
+   if (!entry)
+      return NULL;
+
+   if (entry->state == FILLED)
+      move_to_head(&cache->lru, entry);
+   
+   return entry->value;
+}
+
+
+void 
+util_cache_clear(struct util_cache *cache)
+{
+   uint32_t i;
+
+   assert(cache);
+   if (!cache)
+      return;
+
+   for(i = 0; i < cache->size; ++i) {
+      util_cache_entry_destroy(cache, &cache->entries[i]);
+      cache->entries[i].state = EMPTY;
+   }
+
+   assert(cache->count == 0);
+   assert(is_empty_list(&cache->lru));
+   ensure_sanity(cache);
+}
+
+
+void
+util_cache_destroy(struct util_cache *cache)
+{
+   assert(cache);
+   if (!cache)
+      return;
+
+#ifdef DEBUG
+   if(cache->count >= 20*cache->size) {
+      /* Normal approximation of the Poisson distribution */
+      double mean = (double)cache->count/(double)cache->size;
+      double stddev = sqrt(mean);
+      unsigned i;
+      for(i = 0; i < cache->size; ++i) {
+         double z = fabs(cache->entries[i].count - mean)/stddev;
+         /* This assert should not fail 99.9999998027% of the times, unless 
+          * the hash function is a poor one */
+         assert(z <= 6.0);
+      }
+   }
+#endif
+      
+   util_cache_clear(cache);
+   
+   FREE(cache->entries);
+   FREE(cache);
+}
+
+
+void
+util_cache_remove(struct util_cache *cache,
+                  const void *key)
+{
+   struct util_cache_entry *entry;
+   uint32_t hash;
+
+   assert(cache);
+   if (!cache)
+      return;
+
+   hash = cache->hash(key);
+
+   entry = util_cache_entry_get(cache, hash, key);
+   if (!entry)
+      return;
+
+   if (entry->state == FILLED)
+      util_cache_entry_destroy(cache, entry);
+
+   ensure_sanity(cache);
+}
+
+
+static void
+ensure_sanity(const struct util_cache *cache)
+{
+#ifdef DEBUG
+   unsigned i, cnt = 0;
+
+   assert(cache);
+   for (i = 0; i < cache->size; i++) {
+      struct util_cache_entry *header = &cache->entries[i];
+
+      assert(header);
+      assert(header->state == FILLED ||
+             header->state == EMPTY ||
+             header->state == DELETED);
+      if (header->state == FILLED) {
+         cnt++;
+         assert(header->hash == cache->hash(header->key));
+      }
+   }
+
+   assert(cnt == cache->count);
+   assert(cache->size >= cnt);
+
+   if (cache->count == 0) {
+      assert (is_empty_list(&cache->lru));
+   }
+   else {
+      struct util_cache_entry *header = cache->lru.next;
+
+      assert (header);
+      assert (!is_empty_list(&cache->lru));
+
+      for (i = 0; i < cache->count; i++)
+         header = header->next;
+
+      assert(header == &cache->lru);
+   }
+#endif
+
+   (void)cache;
+}