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Diffstat (limited to 'sal/inc/rtl/allocator.hxx')
| -rw-r--r-- | sal/inc/rtl/allocator.hxx | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/sal/inc/rtl/allocator.hxx b/sal/inc/rtl/allocator.hxx new file mode 100644 index 000000000000..c753a98189a3 --- /dev/null +++ b/sal/inc/rtl/allocator.hxx @@ -0,0 +1,192 @@ +/************************************************************************* + * + * 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. + * + ************************************************************************/ +#if !defined INCLUDED_RTL_ALLOCATOR_HXX +#define INCLUDED_RTL_ALLOCATOR_HXX + +#if ! defined(_SAL_TYPES_H_) +#include "sal/types.h" +#endif +#if ! defined(_RTL_ALLOC_H_) +#include "rtl/alloc.h" +#endif + +#include <cstddef> + +//###################################################### +// This is no general purpose STL allocator but one +// necessary to use STL for some implementation but +// avoid linking sal against the STLPort library!!! +// For more information on when and how to define a +// custom stl allocator have a look at Scott Meyers: +// "Effective STL", Nicolai M. Josuttis: +// "The C++ Standard Library - A Tutorial and Reference" +// and at http://www.josuttis.com/cppcode/allocator.html + +namespace rtl { + +/** @internal */ +template<class T> +class Allocator +{ +public: + typedef T value_type; + typedef T* pointer; + typedef const T* const_pointer; + typedef T& reference; + typedef const T& const_reference; + typedef ::std::size_t size_type; + typedef ::std::ptrdiff_t difference_type; + + //----------------------------------------- + template<class U> + struct rebind + { + typedef Allocator<U> other; + }; + + //----------------------------------------- + pointer address (reference value) const + { + return &value; + } + + //----------------------------------------- + const_pointer address (const_reference value) const + { + return &value; + } + + //----------------------------------------- + Allocator() SAL_THROW(()) + {} + + //----------------------------------------- + template<class U> + Allocator (const Allocator<U>&) SAL_THROW(()) + {} + + //----------------------------------------- + Allocator(const Allocator&) SAL_THROW(()) + {} + + //----------------------------------------- + ~Allocator() SAL_THROW(()) + {} + + //----------------------------------------- + size_type max_size() const SAL_THROW(()) + { + return size_type(-1)/sizeof(T); + } + + //----------------------------------------- + /* Normally the code for allocate should + throw a std::bad_alloc exception if the + requested memory could not be allocated: + (C++ standard 20.4.1.1): + + pointer allocate (size_type n, const void* hint = 0) + { + pointer p = reinterpret_cast<pointer>( + rtl_allocateMemory(sal_uInt32(n * sizeof(T)))); + + if (NULL == p) + throw ::std::bad_alloc(); + + return p; + } + + but some compilers do not compile it if exceptions + are not enabled, e.g. GCC under Linux and it is + in general not desired to compile sal with exceptions + enabled. */ + pointer allocate (size_type n, const void* hint = 0) + { + hint = hint; /* avoid warnings */ + return reinterpret_cast<pointer>( + rtl_allocateMemory(sal_uInt32(n * sizeof(T)))); + } + + //----------------------------------------- + void deallocate (pointer p, size_type /* n */) + { + rtl_freeMemory(p); + } + + //----------------------------------------- + void construct (pointer p, const T& value) + { + new ((void*)p)T(value); + } + + //----------------------------------------- + void destroy (pointer p) + { + p->~T(); + } +}; + +//###################################################### +// Custom STL allocators must be stateless (see +// references above) that's why the operators below +// return always true or false + +/** @internal */ +template<class T, class U> +inline bool operator== (const Allocator<T>&, const Allocator<U>&) SAL_THROW(()) +{ + return true; +} + +/** @internal */ +template<class T, class U> +inline bool operator!= (const Allocator<T>&, const Allocator<U>&) SAL_THROW(()) +{ + return false; +} + +} /* namespace rtl */ + +//###################################################### +/** REQUIRED BY STLPort (see stlport '_alloc.h'): + Hack for compilers that do not support member + template classes (e.g. MSVC 6) + + @internal +*/ +namespace _STL +{ + /** @internal */ + template<class T, class U> + inline ::rtl::Allocator<U> & __stl_alloc_rebind (::rtl::Allocator<T> & a, U const *) + { + return (::rtl::Allocator<U>&)(a); + } +} + +#endif /* INCLUDED_RTL_ALLOCATOR_HXX */ + |