73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
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/*
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* Copyright 2018 Advanced Micro Devices, Inc.
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include "handle_table.h"
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#include "util_math.h"
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drm_private int handle_table_insert(struct handle_table *table, uint32_t key,
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void *value)
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{
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if (key >= table->max_key) {
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uint32_t alignment = sysconf(_SC_PAGESIZE) / sizeof(void*);
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uint32_t max_key = ALIGN(key + 1, alignment);
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void **values;
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values = realloc(table->values, max_key * sizeof(void *));
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if (!values)
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return -ENOMEM;
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memset(values + table->max_key, 0, (max_key - table->max_key) *
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sizeof(void *));
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table->max_key = max_key;
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table->values = values;
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}
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table->values[key] = value;
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return 0;
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}
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drm_private void handle_table_remove(struct handle_table *table, uint32_t key)
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{
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if (key < table->max_key)
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table->values[key] = NULL;
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}
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drm_private void *handle_table_lookup(struct handle_table *table, uint32_t key)
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{
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if (key < table->max_key)
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return table->values[key];
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else
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return NULL;
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}
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drm_private void handle_table_fini(struct handle_table *table)
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{
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free(table->values);
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table->max_key = 0;
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table->values = NULL;
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}
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