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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 03:01:46 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 03:01:46 +0000
commitf8fe689a81f906d1b91bb3220acde2a4ecb14c5b (patch)
tree26484e9d7e2c67806c2d1760196ff01aaa858e8c /src/libs/xpcom18a4/xpcom/ds/nsCppSharedAllocator.h
parentInitial commit. (diff)
downloadvirtualbox-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.h127
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__) */