asherkin@263: /*
asherkin@263:  * Copyright (C) 2012 David Anderson
asherkin@263:  *
asherkin@263:  * This file is part of SourcePawn.
asherkin@263:  *
asherkin@263:  * SourcePawn is free software: you can redistribute it and/or modify it under
asherkin@263:  * the terms of the GNU General Public License as published by the Free
asherkin@263:  * Software Foundation, either version 3 of the License, or (at your option)
asherkin@263:  * any later version.
asherkin@263:  * 
asherkin@263:  * SourcePawn is distributed in the hope that it will be useful, but WITHOUT ANY
asherkin@263:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
asherkin@263:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
asherkin@263:  *
asherkin@263:  * You should have received a copy of the GNU General Public License along with
asherkin@263:  * SourcePawn. If not, see http://www.gnu.org/licenses/.
asherkin@263:  */
asherkin@263: #ifndef _include_jitcraft_reference_h_
asherkin@263: #define _include_jitcraft_reference_h_
asherkin@263: 
asherkin@263: #include "Heap.h"
asherkin@263: #include "Barriers.h"
asherkin@263: #include "Stack.h"
asherkin@263: 
asherkin@263: namespace ke {
asherkin@263: 
asherkin@263: class Array;
asherkin@263: class Struct;
asherkin@263: 
asherkin@263: // A Reference is a typed pointer to another location in memory.
asherkin@263: class Reference : public Object
asherkin@263: {
asherkin@263:     void *location_;
asherkin@263:     Barriered<Object> base_;
asherkin@263: 
asherkin@263:     // We do not compute references to objects, so this does not need to be
asherkin@263:     // traced.
asherkin@263:     LocalSlot slot_;
asherkin@263: 
asherkin@263:   public:
asherkin@263:     static Reference *NewStack(Zone *zone, void *location, Heap::Tenure tenure = Heap::Tenure_Default);
asherkin@263:     static Reference *NewStack(Zone *zone, const LocalSlot &slot, Heap::Tenure tenure = Heap::Tenure_Default);
asherkin@263: 
asherkin@263:     int getInt() {
asherkin@263:         return *reinterpret_cast<int *>(location_);
asherkin@263:     }
asherkin@263:     void setInt(int i) {
asherkin@263:         *reinterpret_cast<int *>(location_) = i;
asherkin@263:     }
asherkin@263:     float getFloat() {
asherkin@263:         return *reinterpret_cast<float *>(location_);
asherkin@263:     }
asherkin@263:     void setFloat(float f) {
asherkin@263:         *reinterpret_cast<float *>(location_) = f;
asherkin@263:     }
asherkin@263: 
asherkin@263:     // WARNING! This should only be for Native calls.
asherkin@263:     void *location() {
asherkin@263:         return location_;
asherkin@263:     }
asherkin@263: 
asherkin@263:     // Begin GC Descriptor.
asherkin@263:     static inline size_t offsetOfBase() {
asherkin@263:         return offsetof(Reference, base_);
asherkin@263:     }
asherkin@263:     // End GC Descriptor.
asherkin@263: 
asherkin@263:     static inline Reference *cast(Object *obj) {
asherkin@263:         assert(!obj || obj->is(MapKind_Reference));
asherkin@263:         return reinterpret_cast<Reference *>(obj);
asherkin@263:     }
asherkin@263: };
asherkin@263: 
asherkin@263: }
asherkin@263: 
asherkin@263: #endif // _include_jitcraft_reference_h_