1 /*
   2  * Copyright (c) 2016, 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_VM_GC_SHARED_GC_HPP
  26 #define SHARE_VM_GC_SHARED_GC_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 
  31 class CollectedHeap;
  32 class GCServicabilitySupport;
  33 
  34 class GC : public CHeapObj<mtGC> {
  35 private:
  36   static GC* _gc;
  37 
  38   CollectedHeap* _heap;
  39   GCServicabilitySupport* _servicability;
  40 
  41 protected:
  42   virtual CollectedHeap* create_heap() = 0;
  43   virtual GCServicabilitySupport* create_servicability_support() = 0;
  44 
  45 public:
  46   static jint initialize();
  47   static bool is_initialized();
  48   static GC* gc();
  49 
  50   jint initialize_heap();
  51 
  52   CollectedHeap* heap() const;
  53   GCServicabilitySupport* servicability_support();
  54 
  55   virtual void initialize_flags();
  56   virtual size_t conservative_max_heap_alignment() = 0;
  57 
  58   virtual void synchronize_safepoint();
  59   virtual void desynchronize_safepoint();
  60 };
  61 
  62 #endif // SHARE_VM_GC_SHARED_GC_HPP