| /* |
| * Copyright 2018 Advanced Micro Devices, Inc. |
| * |
| * 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, sublicense, |
| * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include "handle_table.h" |
| #include "util_math.h" |
| |
| drm_private int handle_table_insert(struct handle_table *table, uint32_t key, |
| void *value) |
| { |
| if (key >= table->max_key) { |
| uint32_t alignment = sysconf(_SC_PAGESIZE) / sizeof(void*); |
| uint32_t max_key = ALIGN(key, alignment); |
| void **values; |
| |
| values = realloc(table->values, max_key * sizeof(void *)); |
| if (!values) |
| return -ENOMEM; |
| |
| memset(values + table->max_key, 0, (max_key - table->max_key) * |
| sizeof(void *)); |
| |
| table->max_key = max_key; |
| table->values = values; |
| } |
| table->values[key] = value; |
| return 0; |
| } |
| |
| drm_private void handle_table_remove(struct handle_table *table, uint32_t key) |
| { |
| if (key < table->max_key) |
| table->values[key] = NULL; |
| } |
| |
| drm_private void *handle_table_lookup(struct handle_table *table, uint32_t key) |
| { |
| if (key < table->max_key) |
| return table->values[key]; |
| else |
| return NULL; |
| } |
| |
| drm_private void handle_table_fini(struct handle_table *table) |
| { |
| free(table->values); |
| table->max_key = 0; |
| table->values = NULL; |
| } |