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100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* 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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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Justin Lebar <justin.lebar@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsAtomicRefcnt_h__
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#define nsAtomicRefcnt_h__
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#include "nscore.h"
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#include "pratom.h"
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class nsAutoRefCnt;
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// This header defines functions for modifying refcounts which wrap the
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// PR_ATOMIC_* macros.
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#if defined(XP_WIN)
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#if PR_BYTES_PER_LONG == 4
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typedef volatile long nsAtomicRefcnt;
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#else
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#error "Windows should have 4 bytes per long."
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#endif
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#else /* !defined(XP_WIN) */
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typedef PRInt32 nsAtomicRefcnt;
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#endif
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inline PRInt32
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NS_AtomicIncrementRefcnt(PRInt32 &refcnt)
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{
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return PR_ATOMIC_INCREMENT(&refcnt);
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}
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inline nsrefcnt
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NS_AtomicIncrementRefcnt(nsrefcnt &refcnt)
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{
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return (nsrefcnt) PR_ATOMIC_INCREMENT((nsAtomicRefcnt*)&refcnt);
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}
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inline nsrefcnt
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NS_AtomicIncrementRefcnt(nsAutoRefCnt &refcnt)
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{
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// This cast is safe since nsAtomicRefCnt contains just one member, its refcount.
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return (nsrefcnt) PR_ATOMIC_INCREMENT((nsAtomicRefcnt*)&refcnt);
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}
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inline nsrefcnt
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NS_AtomicDecrementRefcnt(nsrefcnt &refcnt)
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{
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return (nsrefcnt) PR_ATOMIC_DECREMENT((nsAtomicRefcnt*)&refcnt);
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}
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inline nsrefcnt
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NS_AtomicDecrementRefcnt(nsAutoRefCnt &refcnt)
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{
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return (nsrefcnt) PR_ATOMIC_DECREMENT((nsAtomicRefcnt*)&refcnt);
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}
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inline PRInt32
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NS_AtomicDecrementRefcnt(PRInt32 &refcnt)
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{
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return PR_ATOMIC_DECREMENT(&refcnt);
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}
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#endif
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