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 #include "runtime/thread.hpp"
  28 #include "utilities/debug.hpp"
  29 
  30 class EpsilonThreadLocalData {
  31 private:
  32   size_t _ergo_tlab_size;
  33   int64_t _last_tlab_time;
  34 
  35   EpsilonThreadLocalData() :
  36           _ergo_tlab_size(0),
  37           _last_tlab_time(0) {}
  38 
  39   static EpsilonThreadLocalData* data(Thread* thread) {
  40     assert(UseEpsilonGC, "Sanity");
  41     return thread->gc_data<EpsilonThreadLocalData>();
  42   }
  43 
  44 public:
  45   static void create(Thread* thread) {
  46     new (data(thread)) EpsilonThreadLocalData();
  47   }
  48 
  49   static void destroy(Thread* thread) {
  50     data(thread)->~EpsilonThreadLocalData();
  51   }
  52 
  53   static size_t ergo_tlab_size(Thread *thread) {
  54     return data(thread)->_ergo_tlab_size;
  55   }
  56 
  57   static int64_t last_tlab_time(Thread *thread) {
  58     return data(thread)->_last_tlab_time;
  59   }
  60 
  61   static void set_ergo_tlab_size(Thread *thread, size_t val) {
  62     data(thread)->_ergo_tlab_size = val;
  63   }
  64 
  65   static void set_last_tlab_time(Thread *thread, int64_t time) {
  66     data(thread)->_last_tlab_time = time;
  67   }
  68 };
  69 
  70 #endif // SHARE_VM_GC_EPSILON_EPSILONTHREADLOCALDATA_HPP