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68 lines
1.4 KiB
C++
68 lines
1.4 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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