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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
commit | f8fe689a81f906d1b91bb3220acde2a4ecb14c5b (patch) | |
tree | 26484e9d7e2c67806c2d1760196ff01aaa858e8c /src/libs/xpcom18a4/xpcom/ds/nsCppSharedAllocator.h | |
parent | Initial commit. (diff) | |
download | virtualbox-upstream.tar.xz virtualbox-upstream.zip |
Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/xpcom18a4/xpcom/ds/nsCppSharedAllocator.h')
-rw-r--r-- | src/libs/xpcom18a4/xpcom/ds/nsCppSharedAllocator.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/ds/nsCppSharedAllocator.h b/src/libs/xpcom18a4/xpcom/ds/nsCppSharedAllocator.h new file mode 100644 index 00000000..55f3e19d --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/ds/nsCppSharedAllocator.h @@ -0,0 +1,127 @@ +#ifndef nsCppSharedAllocator_h__ +#define nsCppSharedAllocator_h__ + +#include "nsMemory.h" // for |nsMemory| +#include "nscore.h" // for |NS_XXX_CAST| +#include NEW_H // to allow placement |new| + + + // under Metrowerks (Mac), we don't have autoconf yet +#ifdef __MWERKS__ + #define HAVE_CPP_MEMBER_TEMPLATES + #define HAVE_CPP_NUMERIC_LIMITS +#endif + + // under MSVC shut off copious warnings about unused in-lines +#ifdef _MSC_VER + #pragma warning( disable: 4514 ) +#endif + +#ifdef HAVE_CPP_NUMERIC_LIMITS +#include <limits> +#else +#include <limits.h> +#endif + + +template <class T> +class nsCppSharedAllocator + /* + ...allows Standard Library containers, et al, to use our global shared + (XP)COM-aware allocator. + */ + { + public: + typedef T value_type; + typedef size_t size_type; + typedef ptrdiff_t difference_type; + + typedef T* pointer; + typedef const T* const_pointer; + + typedef T& reference; + typedef const T& const_reference; + + + + nsCppSharedAllocator() { } + +#ifdef HAVE_CPP_MEMBER_TEMPLATES + template <class U> + nsCppSharedAllocator( const nsCppSharedAllocator<U>& ) { } +#endif + + ~nsCppSharedAllocator() { } + + + pointer + address( reference r ) const + { + return &r; + } + + const_pointer + address( const_reference r ) const + { + return &r; + } + + pointer + allocate( size_type n, const void* /*hint*/=0 ) + { + return NS_REINTERPRET_CAST(pointer, nsMemory::Alloc(NS_STATIC_CAST(PRUint32, n*sizeof(T)))); + } + + void + deallocate( pointer p, size_type /*n*/ ) + { + nsMemory::Free(p); + } + + void + construct( pointer p, const T& val ) + { + new (p) T(val); + } + + void + destroy( pointer p ) + { + p->~T(); + } + + size_type + max_size() const + { +#ifdef HAVE_CPP_NUMERIC_LIMITS + return numeric_limits<size_type>::max() / sizeof(T); +#else + return ULONG_MAX / sizeof(T); +#endif + } + +#ifdef HAVE_CPP_MEMBER_TEMPLATES + template <class U> + struct rebind + { + typedef nsCppSharedAllocator<U> other; + }; +#endif + }; + + +template <class T> +PRBool +operator==( const nsCppSharedAllocator<T>&, const nsCppSharedAllocator<T>& ) + { + return PR_TRUE; + } + +template <class T> +PRBool +operator!=( const nsCppSharedAllocator<T>&, const nsCppSharedAllocator<T>& ) + { + return PR_FALSE; + } + +#endif /* !defined(nsCppSharedAllocator_h__) */ |