pcsx2/3rdparty/wxWidgets/include/wx/msw/HeapAllocator.h

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#pragma once
#include <limits>
#include <memory>
extern void _createHeap_wxString();
extern void _destroyHeap_wxString();
extern void* _allocHeap_wxString( size_t size );
extern void* _reallocHeap_wxString( void* original, size_t size );
extern void _freeHeap_wxString( void* ptr );
extern char* _mswHeap_Strdup( const char* src );
extern wchar_t* _mswHeap_Strdup( const wchar_t* src );
extern void _createHeap_wxObject();
extern void _destroyHeap_wxObject();
extern void* _allocHeap_wxObject( size_t size );
extern void* _reallocHeap_wxObject( void* original, size_t size );
extern void _freeHeap_wxObject( void* ptr );
// _pxDestroy_ uses microsoft's internal definition for _Destroy(), found in xmemory;
// which suppresses a warning that we otherwise get. The warning appears to be specific
// to MSVC, so a basic _MSC_VER define will hopefully do the trick to allow support to
// non-Micrsoft compilers.
template<class T> inline
void _pxDestroy_(T* _Ptr)
{
#ifdef _MSC_VER
std::_Destroy( _Ptr );
#else
(_Ptr)->~T();
#endif
}
// --------------------------------------------------------------------------------------
// wxStringAllocator
// --------------------------------------------------------------------------------------
template<typename T>
class wxStringAllocator
{
public :
// typedefs
typedef T value_type;
typedef value_type* pointer;
typedef const value_type* const_pointer;
typedef value_type& reference;
typedef const value_type& const_reference;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
public :
// convert an allocator<T> to allocator<U>
template<typename U>
struct rebind {
typedef wxStringAllocator<U> other;
};
public :
wxStringAllocator()
{
_createHeap_wxString();
}
~wxStringAllocator()
{
_destroyHeap_wxString();
}
wxStringAllocator(wxStringAllocator const&) {}
template<typename U>
explicit wxStringAllocator(wxStringAllocator<U> const&) {}
// address
pointer address(reference r) { return &r; }
const_pointer address(const_reference r) { return &r; }
// memory allocation
pointer allocate(size_type cnt,
typename std::allocator<void>::const_pointer = 0)
{
return reinterpret_cast<pointer>( _allocHeap_wxString(cnt * sizeof(T)) );
}
void deallocate(pointer p, size_type)
{
_freeHeap_wxString( p );
}
// size
size_type max_size() const {
return std::numeric_limits<size_type>::max() / sizeof(T);
}
// construction/destruction
// standard placement-new syntax to initialize the object:
void construct(pointer p, const T& t) { new(p) T(t); }
// standard placement destructor:
void destroy(pointer p) { _pxDestroy_(p); }
bool operator==(wxStringAllocator const&) { return true; }
bool operator!=(wxStringAllocator const& a) { return !operator==(a); }
}; // end of class Allocator
// --------------------------------------------------------------------------------------
// wxObjectAllocator
// --------------------------------------------------------------------------------------
template<typename T>
class wxObjectAllocator
{
public :
// typedefs
typedef T value_type;
typedef value_type* pointer;
typedef const value_type* const_pointer;
typedef value_type& reference;
typedef const value_type& const_reference;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
public :
// convert an allocator<T> to allocator<U>
template<typename U>
struct rebind {
typedef wxObjectAllocator<U> other;
};
public :
wxObjectAllocator()
{
_createHeap_wxObject();
}
~wxObjectAllocator()
{
_destroyHeap_wxObject();
}
wxObjectAllocator(wxObjectAllocator const&) {}
template<typename U>
explicit wxObjectAllocator(wxObjectAllocator<U> const&) {}
// address
pointer address(reference r) { return &r; }
const_pointer address(const_reference r) { return &r; }
// memory allocation
pointer allocate(size_type cnt,
typename std::allocator<void>::const_pointer = 0)
{
return reinterpret_cast<pointer>( _allocHeap_wxObject(cnt * sizeof(T)) );
}
void deallocate(pointer p, size_type)
{
_freeHeap_wxObject( p );
}
// size
size_type max_size() const {
return std::numeric_limits<size_type>::max() / sizeof(T);
}
// construction/destruction
// standard placement-new syntax to initialize the object:
void construct(pointer p, const T& t) { new(p) T(t); }
// standard placement destructor:
void destroy(pointer p) { _pxDestroy_(p); }
bool operator==(wxObjectAllocator const&) { return true; }
bool operator!=(wxObjectAllocator const& a) { return !operator==(a); }
}; // end of class Allocator