1 /*
2 * Copyright 2018 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23
24 #include <stdlib.h>
25 #include <string.h>
26 #include <errno.h>
27 #include <unistd.h>
28 #include "handle_table.h"
29 #include "util_math.h"
30
handle_table_insert(struct handle_table * table,uint32_t key,void * value)31 drm_private int handle_table_insert(struct handle_table *table, uint32_t key,
32 void *value)
33 {
34 if (key >= table->max_key) {
35 uint32_t alignment = sysconf(_SC_PAGESIZE) / sizeof(void*);
36 uint32_t max_key = ALIGN(key + 1, alignment);
37 void **values;
38
39 values = realloc(table->values, max_key * sizeof(void *));
40 if (!values)
41 return -ENOMEM;
42
43 memset(values + table->max_key, 0, (max_key - table->max_key) *
44 sizeof(void *));
45
46 table->max_key = max_key;
47 table->values = values;
48 }
49 table->values[key] = value;
50 return 0;
51 }
52
handle_table_remove(struct handle_table * table,uint32_t key)53 drm_private void handle_table_remove(struct handle_table *table, uint32_t key)
54 {
55 if (key < table->max_key)
56 table->values[key] = NULL;
57 }
58
handle_table_lookup(struct handle_table * table,uint32_t key)59 drm_private void *handle_table_lookup(struct handle_table *table, uint32_t key)
60 {
61 if (key < table->max_key)
62 return table->values[key];
63 else
64 return NULL;
65 }
66
handle_table_fini(struct handle_table * table)67 drm_private void handle_table_fini(struct handle_table *table)
68 {
69 free(table->values);
70 table->max_key = 0;
71 table->values = NULL;
72 }
73