Overloading operator new?

[cpjust]

Hi,
I've got a header file which I use to fix Microsoft's new operator so that it will actually throw a bad_alloc exception like it is supposed to, but I can't get it to compile properly. Here is the interface:

#ifndef OPERATOR_NEW_HEADER_FILE
#define OPERATOR_NEW_HEADER_FILE

#include <new>

#ifdef WIN32

#pragma warning(disable: 4290)	// C++ Exception Specification ignored.


void* operator new( size_t  size ) throw( std::bad_alloc );
void  operator delete( void*  pObject ) throw();
void* operator new[]( size_t  size ) throw( std::bad_alloc );
void  operator delete[]( void*  pObject ) throw();
void* operator new( size_t  size, const  std::nothrow_t& ) throw();
void  operator delete( void*  pObject, const std::nothrow_t& ) throw();
void* operator new[]( size_t  size, const std::nothrow_t& ) throw();
void  operator delete[]( void*  pObject, const std::nothrow_t& ) throw();

#endif	// WIN32

#endif	// OPERATOR_NEW_HEADER_FILE

When I compile, I get these errors:
"void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined"
"void __cdecl operator delete(void *)" (??3@YAXPAX@Z) already defined"

If I remove the first (non-array) new and delete functions, it will compile without any problems. Why can't I overload them?

 

[xwb]

You don't need to declare the prototypes: just define what you want it to do. Defining the fact that it throws an exception is just for documentation purposes: it doesn't do anything on the MS compiler. If you also use Unix on Sun, it doesn't do anything either.

 

[cpjust]

Thanks, but I still get the error whether I use these prototypes or if I define them without prototypes...
It's only the first 2 functions that the compiler is complaining about.