| /************************************************************************** |
| * |
| * 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; |
| } |