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/**************************************************************************
*
* 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.
*
**************************************************************************/
#include "util/u_pointer.h"
#include "util/u_hash_table.h"
#if DETECT_OS_UNIX
#include <sys/stat.h>
#endif
static uint32_t
pointer_hash(const void *key)
{
return _mesa_hash_pointer(key);
}
static bool
pointer_equal(const void *a, const void *b)
{
return a == b;
}
struct hash_table *
util_hash_table_create_ptr_keys(void)
{
return _mesa_hash_table_create(NULL, pointer_hash, pointer_equal);
}
static uint32_t hash_fd(const void *key)
{
#if DETECT_OS_UNIX
int fd = pointer_to_intptr(key);
struct stat stat;
fstat(fd, &stat);
return stat.st_dev ^ stat.st_ino ^ stat.st_rdev;
#else
return 0;
#endif
}
static bool equal_fd(const void *key1, const void *key2)
{
#if DETECT_OS_UNIX
int fd1 = pointer_to_intptr(key1);
int fd2 = pointer_to_intptr(key2);
struct stat stat1, stat2;
fstat(fd1, &stat1);
fstat(fd2, &stat2);
return stat1.st_dev == stat2.st_dev &&
stat1.st_ino == stat2.st_ino &&
stat1.st_rdev == stat2.st_rdev;
#else
return 0;
#endif
}
struct hash_table *
util_hash_table_create_fd_keys(void)
{
return _mesa_hash_table_create(NULL, hash_fd, equal_fd);
}
void *
util_hash_table_get(struct hash_table *ht,
void *key)
{
struct hash_entry *entry = _mesa_hash_table_search(ht, key);
return entry ? entry->data : NULL;
}
enum pipe_error
util_hash_table_foreach(struct hash_table *ht,
enum pipe_error (*callback)
(void *key, void *value, void *data),
void *data)
{
hash_table_foreach(ht, entry) {
enum pipe_error error = callback((void*)entry->key, entry->data, data);
if (error != PIPE_OK)
return error;
}
return PIPE_OK;
}
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