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/**************************************************************************
*
* Copyright 2010 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.
*
**************************************************************************/
#include "handle.h"
#include "util/u_hash.h"
#include "util/u_hash_table.h"
/**
* Hash keys are 32-bit VGHandles
*/
struct util_hash_table *handle_hash = NULL;
static unsigned next_handle = 1;
static unsigned
hash_func(void *key)
{
/* XXX this kind of ugly */
intptr_t ip = pointer_to_intptr(key);
return (unsigned) (ip & 0xffffffff);
}
static int
compare(void *key1, void *key2)
{
if (key1 < key2)
return -1;
else if (key1 > key2)
return +1;
else
return 0;
}
void
init_handles(void)
{
if (!handle_hash)
handle_hash = util_hash_table_create(hash_func, compare);
}
void
free_handles(void)
{
/* XXX destroy */
}
VGHandle
create_handle(void *object)
{
VGHandle h = next_handle++;
util_hash_table_set(handle_hash, intptr_to_pointer(h), object);
#if DEBUG
{
void *v = handle_to_object(h);
assert(v == object);
}
#endif
return h;
}
void
destroy_handle(VGHandle h)
{
util_hash_table_remove(handle_hash, intptr_to_pointer(h));
}
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