rref.h

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/* RLIB - Convenience library for useful things
 * Copyright (C) 2016-2017 Haakon Sporsheim <haakon.sporsheim@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.
 * See the COPYING file at the root of the source repository.
 */
#ifndef __R_REF_H__
#define __R_REF_H__
 
#if !defined(__RLIB_H_INCLUDE_GUARD__) && !defined(RLIB_COMPILATION)
#error "#include <rlib.h> only please."
#endif
 
#include <rlib/rtypes.h>
#include <rlib/concurrency/ratomic.h>
 
R_BEGIN_DECLS
 
typedef struct {
  rauint refcount;              
  raptr weaklst;                
  RDestroyNotify notify;        
} RRef;
 
#define r_ref_refcount(ref) r_atomic_uint_load (&((RRef *)ref)->refcount)
#define R_REF_STATIC_INIT(destroy)        { 0, 0, (RDestroyNotify)destroy }
#define r_ref_init(self, destroy)         R_STMT_START {                      \
  r_atomic_uint_store (&((RRef *)self)->refcount, 1);                         \
  r_atomic_ptr_store (&((RRef *)self)->weaklst, NULL);                        \
  ((RRef *)self)->notify = (RDestroyNotify)destroy;                           \
} R_STMT_END
 
R_API rpointer r_ref_ref (rpointer ref);
R_API void r_ref_unref (rpointer ref);
 
R_API rpointer r_ref_weak_ref (rpointer ref, RFunc notify, rpointer data);
R_API rboolean r_ref_weak_unref (rpointer ref, RFunc notify, rpointer data);
 
R_END_DECLS
 
#endif /* __R_REF_H__ */