brutisso@6904: /*
brutisso@6904:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
brutisso@6904:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
brutisso@6904:  *
brutisso@6904:  * This code is free software; you can redistribute it and/or modify it
brutisso@6904:  * under the terms of the GNU General Public License version 2 only, as
brutisso@6904:  * published by the Free Software Foundation.
brutisso@6904:  *
brutisso@6904:  * This code is distributed in the hope that it will be useful, but WITHOUT
brutisso@6904:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
brutisso@6904:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
brutisso@6904:  * version 2 for more details (a copy is included in the LICENSE file that
brutisso@6904:  * accompanied this code).
brutisso@6904:  *
brutisso@6904:  * You should have received a copy of the GNU General Public License version
brutisso@6904:  * 2 along with this work; if not, write to the Free Software Foundation,
brutisso@6904:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
brutisso@6904:  *
brutisso@6904:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
brutisso@6904:  * or visit www.oracle.com if you need additional information or have any
brutisso@6904:  * questions.
brutisso@6904:  *
brutisso@6904:  */
brutisso@6904: 
brutisso@6904: #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GCID_HPP
brutisso@6904: #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GCID_HPP
brutisso@6904: 
brutisso@6904: #include "memory/allocation.hpp"
brutisso@6904: 
brutisso@6904: class GCId VALUE_OBJ_CLASS_SPEC {
brutisso@6904:  private:
brutisso@6904:   uint _id;
brutisso@6904:   GCId(uint id) : _id(id) {}
brutisso@6904:   GCId() { } // Unused
brutisso@6904: 
brutisso@6904:   static uint _next_id;
brutisso@6904:   static const uint UNDEFINED = (uint)-1;
brutisso@6904: 
brutisso@6904:  public:
brutisso@6904:   uint id() const {
brutisso@6904:     assert(_id != UNDEFINED, "Using undefined GC ID");
brutisso@6904:     return _id;
brutisso@6904:   }
brutisso@6904:   bool is_undefined() const;
brutisso@6904: 
brutisso@6904:   static const GCId create();
brutisso@6904:   static const GCId peek();
brutisso@6904:   static const GCId undefined();
brutisso@6904: };
brutisso@6904: 
brutisso@6904: #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GCID_HPP