dvander@18: /*
dvander@18:  * Copyright (C) 2012 David Anderson
dvander@18:  *
dvander@18:  * This file is part of JITCraft.
dvander@18:  *
dvander@18:  * JITCraft is free software: you can redistribute it and/or modify it under
dvander@18:  * the terms of the GNU General Public License as published by the Free
dvander@18:  * Software Foundation, either version 3 of the License, or (at your option)
dvander@18:  * any later version.
dvander@18:  * 
dvander@18:  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
dvander@18:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
dvander@18:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
dvander@18:  *
dvander@18:  * You should have received a copy of the GNU General Public License along with
dvander@18:  * JITCraft. If not, see http://www.gnu.org/licenses/.
dvander@18:  */
dvander@18: #ifndef _include_jitcraft_reference_h_
dvander@18: #define _include_jitcraft_reference_h_
dvander@18: 
dvander@18: #include "Heap.h"
dvander@18: #include "Barriers.h"
dvander@18: #include "Stack.h"
dvander@18: 
dvander@59: namespace ke {
dvander@18: 
dvander@18: class Array;
dvander@164: class Struct;
dvander@18: 
dvander@18: // A Reference is a typed pointer to another location in memory.
dvander@18: class Reference : public Object
dvander@18: {
dvander@18:     void *location_;
dvander@164:     Barriered<Object> base_;
dvander@164: 
dvander@164:     // We do not compute references to objects, so this does not need to be
dvander@164:     // traced.
dvander@18:     LocalSlot slot_;
dvander@18: 
dvander@18:   public:
dvander@18:     static Reference *NewStack(Zone *zone, void *location, Heap::Tenure tenure = Heap::Tenure_Default);
dvander@18:     static Reference *NewStack(Zone *zone, const LocalSlot &slot, Heap::Tenure tenure = Heap::Tenure_Default);
dvander@18: 
dvander@18:     int getInt() {
dvander@18:         return *reinterpret_cast<int *>(location_);
dvander@18:     }
dvander@18:     void setInt(int i) {
dvander@18:         *reinterpret_cast<int *>(location_) = i;
dvander@18:     }
dvander@18:     float getFloat() {
dvander@18:         return *reinterpret_cast<float *>(location_);
dvander@18:     }
dvander@18:     void setFloat(float f) {
dvander@18:         *reinterpret_cast<float *>(location_) = f;
dvander@18:     }
dvander@18: 
dvander@68:     // WARNING! This should only be for Native calls.
dvander@68:     void *location() {
dvander@68:         return location_;
dvander@68:     }
dvander@68: 
dvander@44:     // Begin GC Descriptor.
dvander@44:     static inline size_t offsetOfBase() {
dvander@44:         return offsetof(Reference, base_);
dvander@44:     }
dvander@44:     // End GC Descriptor.
dvander@44: 
dvander@18:     static inline Reference *cast(Object *obj) {
dvander@39:         assert(!obj || obj->is(MapKind_Reference));
dvander@18:         return reinterpret_cast<Reference *>(obj);
dvander@18:     }
dvander@18: };
dvander@18: 
dvander@18: }
dvander@18: 
dvander@18: #endif // _include_jitcraft_reference_h_