122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "util/u_pointer.h"
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#include "util/u_hash_table.h"
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#if DETECT_OS_UNIX
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#include <sys/stat.h>
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#endif
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static uint32_t
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pointer_hash(const void *key)
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{
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return _mesa_hash_pointer(key);
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}
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static bool
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pointer_equal(const void *a, const void *b)
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{
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return a == b;
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}
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struct hash_table *
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util_hash_table_create_ptr_keys(void)
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{
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return _mesa_hash_table_create(NULL, pointer_hash, pointer_equal);
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}
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static uint32_t hash_fd(const void *key)
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{
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#if DETECT_OS_UNIX
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int fd = pointer_to_intptr(key);
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struct stat stat;
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fstat(fd, &stat);
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return stat.st_dev ^ stat.st_ino ^ stat.st_rdev;
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#else
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return 0;
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#endif
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}
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static bool equal_fd(const void *key1, const void *key2)
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{
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#if DETECT_OS_UNIX
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int fd1 = pointer_to_intptr(key1);
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int fd2 = pointer_to_intptr(key2);
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struct stat stat1, stat2;
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fstat(fd1, &stat1);
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fstat(fd2, &stat2);
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return stat1.st_dev == stat2.st_dev &&
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stat1.st_ino == stat2.st_ino &&
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stat1.st_rdev == stat2.st_rdev;
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#else
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return 0;
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#endif
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}
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struct hash_table *
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util_hash_table_create_fd_keys(void)
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{
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return _mesa_hash_table_create(NULL, hash_fd, equal_fd);
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}
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void *
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util_hash_table_get(struct hash_table *ht,
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void *key)
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{
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struct hash_entry *entry = _mesa_hash_table_search(ht, key);
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return entry ? entry->data : NULL;
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}
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enum pipe_error
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util_hash_table_foreach(struct hash_table *ht,
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enum pipe_error (*callback)
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(void *key, void *value, void *data),
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void *data)
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{
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hash_table_foreach(ht, entry) {
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enum pipe_error error = callback((void*)entry->key, entry->data, data);
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if (error != PIPE_OK)
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return error;
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}
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return PIPE_OK;
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}
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