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Diffstat (limited to 'indra/llcommon/llrefcount.h')
| -rw-r--r-- | indra/llcommon/llrefcount.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/indra/llcommon/llrefcount.h b/indra/llcommon/llrefcount.h new file mode 100644 index 0000000000..540a18b8a0 --- /dev/null +++ b/indra/llcommon/llrefcount.h @@ -0,0 +1,78 @@ +/** + * @file llrefcount.h + * @brief Base class for reference counted objects for use with LLPointer + * + * $LicenseInfo:firstyear=2002&license=viewergpl$ + * + * Copyright (c) 2002-2009, Linden Research, Inc. + * + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 + * + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at + * http://secondlifegrid.net/programs/open_source/licensing/flossexception + * + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. + * + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. + * $/LicenseInfo$ + */ +#ifndef LLREFCOUNT_H +#define LLREFCOUNT_H + +//---------------------------------------------------------------------------- +// RefCount objects should generally only be accessed by way of LLPointer<>'s +// see llthread.h for LLThreadSafeRefCount +//---------------------------------------------------------------------------- + +class LLRefCount +{ +protected: + LLRefCount(const LLRefCount&); // not implemented +private: + LLRefCount&operator=(const LLRefCount&); // not implemented + +protected: + virtual ~LLRefCount(); // use unref() + +public: + LLRefCount(); + + void ref() + { + mRef++; + } + + S32 unref() + { + llassert(mRef >= 1); + if (0 == --mRef) + { + delete this; + return 0; + } + return mRef; + } + + S32 getNumRefs() const + { + return mRef; + } + +private: + S32 mRef; +}; + +#endif |