dvander@28: /*
dvander@28:  * Copyright (C) 2012 David Anderson
dvander@28:  *
dvander@28:  * This file is part of JITCraft.
dvander@28:  *
dvander@28:  * JITCraft is free software: you can redistribute it and/or modify it under
dvander@28:  * the terms of the GNU General Public License as published by the Free
dvander@28:  * Software Foundation, either version 3 of the License, or (at your option)
dvander@28:  * any later version.
dvander@28:  * 
dvander@28:  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
dvander@28:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
dvander@28:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
dvander@28:  *
dvander@28:  * You should have received a copy of the GNU General Public License along with
dvander@28:  * JITCraft. If not, see http://www.gnu.org/licenses/.
dvander@28:  */
dvander@28: #ifndef _include_jitcraft_barriers_h_
dvander@28: #define _include_jitcraft_barriers_h_
dvander@28: 
dvander@59: namespace ke {
dvander@28: 
dvander@45: class Object;
dvander@28: 
dvander@11: // Used to store unbarriered heap locations.
dvander@11: template <typename T>
dvander@11: class Unbarriered
dvander@11: {
dvander@28:     T *obj_;
dvander@11: 
dvander@11:   public:
dvander@11:     Unbarriered()
dvander@11:       : obj_(NULL)
dvander@11:     {
dvander@11:     }
dvander@11: 
dvander@11:     T *operator ->() const {
dvander@11:         return operator *();
dvander@11:     }
dvander@11:     T *operator *() const {
dvander@11:         return static_cast<T *>(obj_);
dvander@11:     }
dvander@11:     Unbarriered &operator =(T *obj) {
dvander@11:         obj_ = obj;
dvander@11:         return *this;
dvander@11:     }
dvander@45:     Object **address() {
dvander@45:         return reinterpret_cast<Object **>(&obj_);
dvander@11:     }
dvander@11:     operator bool () const {
dvander@11:         return !!obj_;
dvander@11:     }
dvander@11:     operator T*() const {
dvander@11:         return static_cast<T *>(obj_);
dvander@11:     }
dvander@28: };
dvander@28: 
dvander@13: // Used to store unbarriered heap locations.
dvander@13: template <typename T>
dvander@13: class Barriered
dvander@13: {
dvander@28:     T *obj_;
dvander@13: 
dvander@13:   public:
dvander@13:     Barriered()
dvander@13:       : obj_(NULL)
dvander@13:     {
dvander@13:     }
dvander@13: 
dvander@13:     T *operator ->() const {
dvander@13:         return operator *();
dvander@13:     }
dvander@13:     T *operator *() const {
dvander@13:         return static_cast<T *>(obj_);
dvander@13:     }
dvander@13:     Barriered &operator =(T *obj) {
dvander@13:         obj_ = obj;
dvander@13:         return *this;
dvander@13:     }
dvander@13:     Object **addr() {
dvander@13:         return &obj_;
dvander@13:     }
dvander@13:     operator bool () const {
dvander@13:         return !!obj_;
dvander@13:     }
dvander@13:     operator T*() const {
dvander@13:         return static_cast<T *>(obj_);
dvander@13:     }
dvander@28: };
dvander@28: 
dvander@28: }
dvander@28: 
dvander@28: #endif // _include_jitcraft_barriers_h_