1 /*
   2  * Copyright (c) 2019, SAP and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 #include "precompiled.hpp"
  26 #include "memory/metaspace/chunkLevel.hpp"
  27 #include "utilities/globalDefinitions.hpp"
  28 
  29 namespace metaspace {
  30 
  31 chklvl_t chklvl::level_fitting_word_size(size_t word_size) {
  32 
  33   assert(chklvl::MAX_CHUNK_WORD_SIZE >= word_size,
  34          "too large allocation size (" SIZE_FORMAT ")", word_size * BytesPerWord);
  35 
  36   // TODO: This can be done much better.
  37   chklvl_t l = chklvl::HIGHEST_CHUNK_LEVEL;
  38   while (l >= chklvl::LOWEST_CHUNK_LEVEL &&
  39          word_size > chklvl::word_size_for_level(l)) {
  40     l --;
  41   }
  42 
  43   return l;
  44 }
  45 
  46 
  47 } // namespace metaspace
  48 
  49