1 /*
   2  * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_VM_GC_EPSILON_EPSILONTHREADLOCALDATA_HPP
  25 #define SHARE_VM_GC_EPSILON_EPSILONTHREADLOCALDATA_HPP
  26 
  27 class EpsilonThreadLocalData {
  28 private:
  29   size_t _ergo_tlab_size;
  30 
  31   EpsilonThreadLocalData() :
  32           _ergo_tlab_size(0) {}
  33 
  34   static EpsilonThreadLocalData* data(Thread* thread) {
  35     assert(UseEpsilonGC, "Sanity");
  36     return thread->gc_data<EpsilonThreadLocalData>();
  37   }
  38 
  39 public:
  40   static void create(Thread* thread) {
  41     new (data(thread)) EpsilonThreadLocalData();
  42   }
  43 
  44   static void destroy(Thread* thread) {
  45     data(thread)->~EpsilonThreadLocalData();
  46   }
  47 
  48   static size_t ergo_tlab_size(Thread *thread) {
  49     return data(thread)->_ergo_tlab_size;
  50   }
  51 
  52   static void set_ergo_tlab_size(Thread *thread, size_t val) {
  53     data(thread)->_ergo_tlab_size = val;
  54   }
  55 };
  56 
  57 #endif // SHARE_VM_GC_EPSILON_EPSILONTHREADLOCALDATA_HPP