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03be41151d
Introduce an opaque cairo_reference_count_t and define operations on it in terms of atomic ops. Update all users of reference counters to use the new opaque type.
66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2007 Chris Wilson
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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 either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is University of Southern
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* California.
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*
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* Contributor(s):
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* Chris Wilson <chris@chris-wilson.co.uk>
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*/
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#ifndef CAIRO_REFRENCE_COUNT_PRIVATE_H
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#define CAIRO_REFRENCE_COUNT_PRIVATE_H
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#include "cairo-atomic-private.h"
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CAIRO_BEGIN_DECLS
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/* Encapsulate operations on the object's reference count */
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typedef struct {
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cairo_atomic_int_t ref_count;
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} cairo_reference_count_t;
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#define _cairo_reference_count_inc(RC) _cairo_atomic_int_inc (&(RC)->ref_count)
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#define _cairo_reference_count_dec_and_test(RC) _cairo_atomic_int_dec_and_test (&(RC)->ref_count)
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#define CAIRO_REFERENCE_COUNT_INIT(RC, VALUE) ((RC)->ref_count = (VALUE))
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#define CAIRO_REFERENCE_COUNT_GET_VALUE(RC) _cairo_atomic_int_get (&(RC)->ref_count)
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#define CAIRO_REFERENCE_COUNT_SET_VALUE(RC, VALUE) _cairo_atomic_int_set (&(RC)->ref_count, (VALUE))
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#define CAIRO_REFERENCE_COUNT_INVALID_VALUE ((cairo_atomic_int_t) -1)
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#define CAIRO_REFERENCE_COUNT_INVALID ((cairo_reference_count_t) {CAIRO_REFERENCE_COUNT_INVALID_VALUE})
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#define CAIRO_REFERENCE_COUNT_IS_INVALID(RC) (CAIRO_REFERENCE_COUNT_GET_VALUE (RC) == CAIRO_REFERENCE_COUNT_INVALID_VALUE)
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#define CAIRO_REFERENCE_COUNT_HAS_REFERENCE(RC) (CAIRO_REFERENCE_COUNT_GET_VALUE (RC) > 0)
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CAIRO_END_DECLS
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#endif
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