/*

  * Copyright (C) 2012 David Anderson

  *

  * This file is part of JITCraft.

  *

  * JITCraft is free software: you can redistribute it and/or modify it under

  * the terms of the GNU General Public License as published by the Free

  * Software Foundation, either version 3 of the License, or (at your option)

  * any later version.

  * 

  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY

  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License along with

  * JITCraft. If not, see http://www.gnu.org/licenses/.

  */

 #ifndef _include_jitcraft_function_h_

 #define _include_jitcraft_function_h_

 #include "Heap.h"

 #include "Barriers.h"

 #include "Token.h"

 #include "Types.h"

 namespace ke {

 class Code;

 class Module;

 class Type;

 class String;

 class Function : public Object

 {

     Barriered<Code> code_;

     Barriered<Type> type_;

     Barriered<String> name_;

     SourcePosition pos_;

  public:

     static Function *New(Zone *zone, Handle<Code> code, Handle<Type> type, Handle<String> name,

                          const SourcePosition &pos);

     Code *code() const {

         return code_;

     }

     Type *type() const {

         return type_;

     }

     String *name() const {

         return name_;

     }

     const SourcePosition &pos() {

         return pos_;

     }

     unsigned nargs() {

         return type()->parameters()->length();

     }

     Type *argType(size_t index) {

         return type()->parameterAt(index);

     }

     // Begin GC Descriptor.

     static inline size_t offsetOfCode() {

         return offsetof(Function, code_);

     }

     static inline size_t offsetOfType() {

         return offsetof(Function, type_);

     }

     static inline size_t offsetOfName() {

         return offsetof(Function, name_);

     }

     // End GC Descriptor.

     static inline Function *cast(Object *obj) {

         assert(!obj || obj->is(MapKind_Function));

         return reinterpret_cast<Function *>(obj);

     }

 };

 // A Native is a function with a very specialized calling convention, intended

 // for earlier ISourcePawnEngine API compatibility.

 class Native : public Object

 {

     Barriered<Type> type_;

     Barriered<String> name_;

     void *function_;

   public:

     static Native *New(Zone *zone, Handle<Type> type, Handle<String> name);

     void *function() {

         return function_;

     }

     Type *type() {

         return type_;

     }

     String *name() {

         return name_;

     }

     void bind(void *function) {

         function_ = function;

     }

     // Begin GC Descriptor.

     static inline size_t offsetOfType() {

         return offsetof(Native, type_);

     }

     static inline size_t offsetOfName() {

         return offsetof(Native, name_);

     }

     // End GC Descriptor.

     static inline Native *cast(Object *obj) {

         assert(!obj || obj->is(MapKind_Native));

         return reinterpret_cast<Native *>(obj);

     }

 };

 }

 #endif // _include_jitcraft_function_h_