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evas/common: added a generic cache in evas common.

This commit is contained in:
subhransu mohanty 2017-11-09 10:34:01 +09:00 committed by Jean-Philippe Andre
parent 76e75dc105
commit d4a2b2025b
2 changed files with 107 additions and 1 deletions
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4
src/Makefile_Evas.am
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@ -494,7 +494,9 @@ lib/evas/common/language/evas_language_utils.h \
lib/evas/common/language/evas_script_table.h \
lib/evas/common/evas_text_utils.h \
lib/evas/common/evas_font_ot.h \
lib/evas/common/evas_font_draw.h
lib/evas/common/evas_font_draw.h \
lib/evas/common/evas_common_generic_cache.c
lib_evas_libevas_la_CPPFLAGS = -I$(top_builddir)/src/lib/efl \
-I$(top_srcdir)/src/lib/evas/canvas \

104
src/lib/evas/common/evas_common_generic_cache.c Normal file
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@ -0,0 +1,104 @@
#include "evas_common_private.h"
EAPI Generic_Cache*
generic_cache_new(void *user_data, Generic_Cache_Free func)
{
Generic_Cache *cache;
cache = calloc(1, sizeof(Generic_Cache));
cache->hash = eina_hash_int32_new(NULL);
cache->user_data = user_data;
cache->free_func = func;
return cache;
}
EAPI void
generic_cache_destroy(Generic_Cache *cache)
{
generic_cache_dump(cache);
eina_hash_free(cache->hash);
}
EAPI void
generic_cache_dump(Generic_Cache *cache)
{
Generic_Cache_Entry *entry;
if (cache)
{
eina_hash_free_buckets(cache->hash);
EINA_LIST_FREE(cache->lru_list, entry)
{
cache->free_func(cache->user_data, entry->data);
free(entry);
}
}
}
EAPI void
generic_cache_set(Generic_Cache *cache, void *key, void *surface)
{
Generic_Cache_Entry *entry = NULL;
int count;
entry = calloc(1, sizeof(Generic_Cache_Entry));
entry->key = key;
entry->data = surface;
entry->ref = 1;
eina_hash_add(cache->hash, &key, entry);
cache->lru_list = eina_list_prepend(cache->lru_list, entry);
count = eina_list_count(cache->lru_list);
if (count > 50)
{
entry = eina_list_data_get(eina_list_last(cache->lru_list));
// if its still being ref.
if (entry->ref) return;
eina_hash_del(cache->hash, &entry->key, entry);
cache->lru_list = eina_list_remove_list(cache->lru_list, eina_list_last(cache->lru_list));
cache->free_func(cache->user_data, entry->data);
free(entry);
}
}
EAPI void *
generic_cache_get(Generic_Cache *cache, void *key)
{
Generic_Cache_Entry *entry = NULL, *lru_data;
Eina_List *l;
entry = eina_hash_find(cache->hash, &key);
if (entry)
{
// update the ref
entry->ref += 1;
// promote in lru
EINA_LIST_FOREACH(cache->lru_list, l, lru_data)
{
if (lru_data == entry)
{
cache->lru_list = eina_list_promote_list(cache->lru_list, l);
break;
}
}
return entry->data;
}
return NULL;
}
EAPI void
generic_cache_drop(Generic_Cache *cache, void *key)
{
Generic_Cache_Entry *entry = NULL;
entry = eina_hash_find(cache->hash, &key);
if (entry)
{
entry->ref -= 1;
// if its still being ref.
if (entry->ref) return;
eina_hash_del(cache->hash, &entry->key, entry);
// find and remove from lru list
cache->lru_list = eina_list_remove(cache->lru_list, entry);
cache->free_func(cache->user_data, entry->data);
free(entry);
}
}