mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-10 18:00:15 +01:00
128 lines
2.5 KiB
C++
128 lines
2.5 KiB
C++
#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__) */
|