1 /*
   2  * Copyright (c) 2019, 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_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP
  25 #define SHARE_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 
  29 class ShenandoahHeuristics;
  30 
  31 #define SHENANDOAH_CHECK_FLAG_SET(name)                                     \
  32   do {                                                                      \
  33     if (!(name)) {                                                          \
  34       err_msg message("GC mode needs -XX:+" #name " to work correctly");    \
  35       vm_exit_during_initialization("Error", message);                      \
  36     }                                                                       \
  37   } while (0)
  38 
  39 #define SHENANDOAH_CHECK_FLAG_UNSET(name)                                   \
  40   do {                                                                      \
  41     if ((name)) {                                                           \
  42       err_msg message("GC mode needs -XX:-" #name " to work correctly");    \
  43       vm_exit_during_initialization("Error", message);                      \
  44     }                                                                       \
  45   } while (0)
  46 
  47 class ShenandoahMode : public CHeapObj<mtGC> {
  48 public:
  49   virtual void initialize_flags() const = 0;
  50   virtual ShenandoahHeuristics* initialize_heuristics() const = 0;
  51   virtual const char* name() = 0;
  52   virtual bool is_diagnostic() = 0;
  53   virtual bool is_experimental() = 0;
  54 };
  55 
  56 #endif // SHARE_GC_SHENANDOAH_MODE_SHENANDOAHMODE_HPP