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/*
* Copyright 1999-2006 University of Chicago
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "globus_object_cache.h"
#include "globus_libc.h"
/**********************************************************************
* Object Creation API
**********************************************************************/
void
globus_object_cache_init (globus_object_cache_t * cache)
{
if ( cache == NULL ) return;
globus_hashtable_init (&(cache->handlemap),
65 /* default size */,
globus_hashtable_voidp_hash,
globus_hashtable_voidp_keyeq);
globus_fifo_init (&(cache->handles));
cache->capacity_limit = 65;
cache->entry_count = 0;
}
void
globus_object_cache_destroy (globus_object_cache_t * cache)
{
globus_object_t * obj;
if(cache == NULL) return;
while(!globus_fifo_empty(&(cache->handles)))
{
obj = globus_object_cache_remove(
cache,
globus_fifo_peek(&(cache->handles)));
globus_object_free(obj);
}
globus_hashtable_destroy(&(cache->handlemap));
globus_fifo_destroy (&(cache->handles));
}
void
globus_object_cache_insert (globus_object_cache_t * cache,
void * new_handle,
globus_object_t * new_object)
{
if ( (cache == NULL)
|| (globus_object_cache_lookup (cache, new_handle) != NULL)
|| (new_object == NULL) ) return;
if ( cache->entry_count > cache->capacity_limit ) {
globus_object_t * spilled_element;
spilled_element = globus_object_cache_remove (
cache,
globus_fifo_peek ( &(cache->handles) ) );
/* FIXME? should we return this rather than destroy internally? */
globus_object_free ( spilled_element );
}
globus_hashtable_insert (&(cache->handlemap),
new_handle,
(void *) new_object);
globus_fifo_enqueue (&(cache->handles), new_handle);
cache->entry_count += 1;
}
globus_object_t *
globus_object_cache_lookup (globus_object_cache_t * cache,
void * handle)
{
if ( cache == NULL ) return NULL;
return globus_hashtable_lookup (&(cache->handlemap), handle);
}
globus_object_t *
globus_object_cache_remove (globus_object_cache_t * cache,
void * handle)
{
globus_object_t * object;
if ( cache == NULL ) return NULL;
object = globus_hashtable_remove (&(cache->handlemap), handle);
globus_fifo_remove (&(cache->handles), handle);
if ( object != NULL ) cache->entry_count -= 1;
return object;
}
globus_fifo_t *
globus_object_cache_list (globus_object_cache_t * cache)
{
if ( cache == NULL ) return NULL;
return globus_fifo_copy (&(cache->handles));
}
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