77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* EINA - EFL data type library
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* Copyright (C) 20011 Cedric Bail
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EINA_REFCOUNT_H_
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#define EINA_REFCOUNT_H_
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/**
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* @addtogroup Eina_Refcount References counting
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*
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* @brief Small macro that simplify references counting.
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*
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* References counting is not a difficult task, but you must
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* handle it correctly every where, and that the issue. This
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* set of macro do provide helper that will force to use the
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* correct code in most case and reduce the bug likeliness.
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* Of course this without affecting speed !
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*/
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/**
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* @addtogroup Eina_Data_Types_Group Data Types
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*
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* @{
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*/
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/**
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* @defgroup Eina_Refcount References counting
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*
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* @{
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*/
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/**
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* @typedef Eina_Refcount
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* Inlined references counting type.
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*/
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typedef int Eina_Refcount;
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/** Used for declaring a reference counting member in a struct */
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#define EINA_REFCOUNT Eina_Refcount __refcount
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/** Used just after allocating a object */
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#define EINA_REFCOUNT_INIT(Variable) (Variable)->__refcount = 1
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/** Used when using referring to an object one more time */
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#define EINA_REFCOUNT_REF(Variable) (Variable)->__refcount++
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/** Used when removing a reference to an object. The code just after will automatically be called when necessary */
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#define EINA_REFCOUNT_UNREF(Variable) \
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if (--((Variable)->__refcount) == 0)
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/** Get refcounting value */
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#define EINA_REFCOUNT_GET(Variable) (Variable)->__refcount
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* EINA_REFCOUNT_H_ */
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