// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.


#ifndef RUST_REFCOUNT_H
#define RUST_REFCOUNT_H

#include "sync/sync.h"

// Refcounting defines
typedef unsigned long ref_cnt_t;

#define RUST_ATOMIC_REFCOUNT()                                             \
private:                                                                   \
   intptr_t ref_count;                                                     \
public:                                                                    \
   void ref() {                                                            \
       intptr_t old = sync::increment(ref_count);                          \
       assert(old > 0);                                                    \
   }                                                                       \
   void deref() { if(0 == sync::decrement(ref_count)) { delete_this(); } } \
   intptr_t get_ref_count() { return sync::read(ref_count); }

#endif