/*

 * 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 + 1, 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;

}