IABSD.fr/xenocara/lib/libdrm/amdgpu/handle_table.c

Branch : - branch - master - tag -

• Show log

  Commit

• Author : jsg
  Date : 2018-09-13 11:55:15
  Hash : a81d3f52
  Message : Import libdrm 2.4.94

• lib/libdrm/amdgpu/handle_table.c

• /*
   * 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;
  }