/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file memory
 * @author tobspr
 * @date 2016-11-01
 */

// This file, and all the other files in this directory, aren't
// intended to be compiled--they're just parsed by CPPParser (and
// interrogate) in lieu of the actual system headers, to generate the
// interrogate database.

#ifndef ALLOCATOR_H
#define ALLOCATOR_H

#include <stdtypedefs.h>
#include <iterator>


#ifdef GCC_STYLE_ALLOCATOR

class alloc {
public:
  static void *allocate(size_t n);
  static void deallocate(void *p, size_t n);
};

#else  // GCC_STYLE_ALLOCATOR

namespace std {

    // pointer traits
    template <class Ptr> struct pointer_traits;
    template <class T> struct pointer_traits<T*>;
 
    // pointer safety
    enum class pointer_safety { relaxed, preferred, strict };
    
    // allocator argument tag
    struct allocator_arg_t { };
    constexpr allocator_arg_t allocator_arg = allocator_arg_t();
 
    // uses_allocator
    template <class T, class Alloc> struct uses_allocator;
 
    // allocator traits
    template <class Alloc> struct allocator_traits;
 
    // the default allocator:
    template <class T> class allocator;
    template <> class allocator<void>;
    
    // raw storage iterator:
    template <class OutputIterator, class T> class raw_storage_iterator;
 
    // class template unique_ptr:
    template <class T> class default_delete;
    template <class T> class default_delete<T[]>;
    template <class T, class D = default_delete<T>> class unique_ptr;
    template <class T, class D> class unique_ptr<T[], D>;
    // class bad_weak_ptr:
    class bad_weak_ptr;
 
    // class template shared_ptr:
    template<class T> class shared_ptr;
    // class template weak_ptr:
    template<class T> class weak_ptr;
 
    // class template owner_less:
    template<class T> class owner_less;
 
    // class template enable_shared_from_this:
    template<class T> class enable_shared_from_this;
 
    //  hash support
    template <class T> struct hash;
    template <class T, class D> struct hash<unique_ptr<T, D> >;
    template <class T> struct hash<shared_ptr<T> >;
 
    // auto_ptr (deprecated)
    template <class X> class auto_ptr;

    template <class Ptr> struct pointer_traits {
        typedef Ptr         pointer;
        typedef Ptr         element_type;
        typedef ptrdiff_t   difference_type;
 
        template <class U> using rebind = U; 
    };

    template <class T> struct pointer_traits<T*> {
        typedef T*          pointer;
        typedef T           element_type;
        typedef ptrdiff_t   difference_type;
 
        template <class U> using rebind = U*;
    };


    template <class Alloc> struct allocator_traits {
        typedef Alloc allocator_type;
 
        typedef typename Alloc::value_type value_type;
 
        typedef void* pointer;
        typedef const void* const_pointer;
        typedef void* void_pointer;
        typedef const void* const_void_pointer;
 
        typedef std::ptrdiff_t difference_type;
        typedef size_t size_type;
 
        struct propagate_on_container_copy_assignment;
        struct propagate_on_container_move_assignment;
        struct propagate_on_container_swap;
        struct is_always_equal;
 
        template <class T> using rebind_alloc = size_t;
        //template <class T> using rebind_traits = allocator_traits<rebind_alloc<T> >;
    };

    template <class T> class allocator;
    // specialize for void:
    template <> class allocator<void> {
    public:
        typedef void*           pointer;
        typedef const void*     const_pointer;
        // reference-to-void members are impossible.
        typedef void            value_type;
        template <class U> struct rebind { typedef allocator<U> other; };
    };
    template <class T> class allocator {
    public:
        struct true_type_; // do not depend on type_traits header
        typedef size_t          size_type;
        typedef ptrdiff_t       difference_type;
        typedef T*              pointer;
        typedef const T*        const_pointer;
        typedef T&              reference;
        typedef const T&        const_reference;
        typedef T               value_type;
        template <class U> struct rebind { typedef allocator<U> other; };
        typedef true_type_       propagate_on_container_move_assignment;
        typedef true_type_       is_always_equal;
 
    };

    template <class OutputIterator, class T>
    class raw_storage_iterator
        : public iterator<output_iterator_tag,void,void,void,void> {
    public:
    };


    template <class T> struct default_delete {};
 
    template <class T> struct default_delete<T[]> {};

    //  unique_ptr for single objects
    template <class T, class D = default_delete<T>> class unique_ptr {
    public:
        typedef T* pointer;
        typedef T  element_type;
        typedef D  deleter_type;
    };
 
    class bad_weak_ptr: public std::exception {};

    template<class T> class shared_ptr {
    public:
        typedef T element_type;
    };

    template<class T> class weak_ptr {
    public:
        typedef T element_type;
    };

    template<class T> class enable_shared_from_this {};
}

#endif  // GCC_STYLE_ALLOCATOR

#endif