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Diffstat (limited to 'formula/inc/formula/intruref.hxx')
-rw-r--r-- | formula/inc/formula/intruref.hxx | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/formula/inc/formula/intruref.hxx b/formula/inc/formula/intruref.hxx new file mode 100644 index 000000000000..93b988d6d6b0 --- /dev/null +++ b/formula/inc/formula/intruref.hxx @@ -0,0 +1,101 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +#ifndef FORMULA_INTRUREF_HXX +#define FORMULA_INTRUREF_HXX + +namespace formula +{ + +/** A simple intrusive refcounting template, not thread safe, but therefore + also a bit faster than boost's smart_ptr or uno::Reference equivalents, and + the type to be refcounted has full control over its behavior. + + Mainly used in formula compiler and interpreter context, e.g. ScTokenRef, + ScMatrixRef. + + Type T must implement methods IncRef() and DecRef(), in case typename T is + const they must be const as well and the reference counter be mutable. + */ +template< typename T > class SimpleIntrusiveReference +{ + T* p; +public: + inline SimpleIntrusiveReference() : p(0) {} + inline SimpleIntrusiveReference( const SimpleIntrusiveReference& r ) + { + p = r.p; + if ( p ) + p->IncRef(); + } + inline SimpleIntrusiveReference( T *t ) + { + p = t; + if ( p ) + t->IncRef(); + } + inline void Clear() + { + if ( p ) + { + p->DecRef(); + p = 0; + } + } + inline ~SimpleIntrusiveReference() + { + if ( p ) + p->DecRef(); + } + inline SimpleIntrusiveReference& operator=( T* t ) + { + if ( t ) + t->IncRef(); + if ( p ) + p->DecRef(); + p = t; + return *this; + } + inline SimpleIntrusiveReference& operator=( const SimpleIntrusiveReference& r ) + { + *this = r.p; + return *this; + } + inline bool Is() const { return p != 0; } + inline bool operator ! () const { return p == 0; } + inline T* operator&() const { return p; } + inline T* operator->() const { return p; } + inline T& operator*() const { return *p; } + inline operator T*() const { return p; } + inline T* get() const { return p; } +}; +// ============================================================================= +} // formula +// ============================================================================= + +#endif // SC_INTRUREF_HXX + |