Jip J. Dekker
f2a1c4e389
git-subtree-dir: software/mza git-subtree-split: f970a59b177c13ca3dd8aaef8cc6681d83b7e813
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Jip J. Dekker <jip.dekker@monash.edu>
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* Guido Tack <guido.tack@monash.edu>
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#pragma once
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namespace MiniZinc {
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class Interpreter;
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class RefCountedObject {
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public:
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enum RCOType { VEC, VAR };
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protected:
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unsigned int _model_ref_count;
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unsigned int _memory_ref_count : 31;
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unsigned int _rco_type : 1;
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int _timestamp;
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RefCountedObject(const RCOType& t, int timestamp)
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: _model_ref_count(0),
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_memory_ref_count(0),
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_rco_type(t == VEC ? 1 : 0),
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_timestamp(timestamp) {}
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public:
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RCOType rcoType(void) const { return _rco_type == 1 ? VEC : VAR; }
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const int timestamp() const { return _timestamp; }
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bool exists() const { return _model_ref_count > 0; }
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bool alive() const { return _model_ref_count + _memory_ref_count > 0; }
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bool unique() const { return _model_ref_count == 1; }
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void addRef(Interpreter* interpreter) { _model_ref_count++; }
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void addMemRef(Interpreter* interpreter) { _memory_ref_count++; }
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static void rmRef(Interpreter* interpreter, RefCountedObject* rco);
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static void rmMemRef(Interpreter* interpreter, RefCountedObject* rco);
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};
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} // namespace MiniZinc
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