зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
2.1 KiB
C++
105 строки
2.1 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 nsCppSharedAllocator_h__
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#define nsCppSharedAllocator_h__
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#include "nsMemory.h" // for |nsMemory|
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#include NEW_H // to allow placement |new|
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// under MSVC shut off copious warnings about unused in-lines
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#ifdef _MSC_VER
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#pragma warning( disable: 4514 )
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#endif
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#include <limits.h>
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template <class T>
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class nsCppSharedAllocator
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/*
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...allows Standard Library containers, et al, to use our global shared
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(XP)COM-aware allocator.
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*/
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{
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public:
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typedef T value_type;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef T* pointer;
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typedef const T* const_pointer;
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typedef T& reference;
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typedef const T& const_reference;
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nsCppSharedAllocator() { }
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~nsCppSharedAllocator() { }
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pointer
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address( reference r ) const
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{
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return &r;
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}
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const_pointer
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address( const_reference r ) const
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{
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return &r;
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}
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pointer
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allocate( size_type n, const void* /*hint*/=0 )
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{
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return reinterpret_cast<pointer>(nsMemory::Alloc(static_cast<PRUint32>(n*sizeof(T))));
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}
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void
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deallocate( pointer p, size_type /*n*/ )
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{
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nsMemory::Free(p);
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}
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void
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construct( pointer p, const T& val )
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{
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new (p) T(val);
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}
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void
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destroy( pointer p )
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{
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p->~T();
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}
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size_type
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max_size() const
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{
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return ULONG_MAX / sizeof(T);
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}
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};
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template <class T>
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bool
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operator==( const nsCppSharedAllocator<T>&, const nsCppSharedAllocator<T>& )
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{
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return true;
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}
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template <class T>
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bool
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operator!=( const nsCppSharedAllocator<T>&, const nsCppSharedAllocator<T>& )
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{
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return false;
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}
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#endif /* !defined(nsCppSharedAllocator_h__) */
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