1 /*
   2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_G1_G1REGIONMARKSTATSCACHE_INLINE_HPP
  26 #define SHARE_GC_G1_G1REGIONMARKSTATSCACHE_INLINE_HPP
  27 
  28 #include "gc/g1/g1RegionMarkStatsCache.hpp"
  29 #include "runtime/atomic.hpp"
  30 
  31 inline G1RegionMarkStatsCache::G1RegionMarkStatsCacheEntry* G1RegionMarkStatsCache::find_for_add(uint region_idx) {
  32   uint const cache_idx = hash(region_idx);
  33 
  34   G1RegionMarkStatsCacheEntry* cur = &_cache[cache_idx];
  35   if (cur->_region_idx != region_idx) {
  36     evict(cache_idx);
  37     cur->_region_idx = region_idx;
  38     _cache_misses++;
  39   } else {
  40     _cache_hits++;
  41   }
  42 
  43   return cur;
  44 }
  45 
  46 inline void G1RegionMarkStatsCache::evict(uint idx) {
  47   G1RegionMarkStatsCacheEntry* cur = &_cache[idx];
  48   if (cur->_stats._live_words != 0) {
  49     Atomic::add(&_target[cur->_region_idx]._live_words, cur->_stats._live_words);
  50   }
  51   cur->clear();
  52 }
  53 
  54 #endif // SHARE_GC_G1_G1REGIONMARKSTATSCACHE_INLINE_HPP