Atmel CAVR-4 Manual De Usuario

CAVR-4

Feature descriptions

Reference Guide

To override the default 

new

 and 

delete

 operator for a class, declare:

void *operator new(size_t);

void operator delete(void *);

as member functions, just like in ordinary C++.

If a pointer to class memory cannot be implicitly casted into a default pointer type, no 
temporaries can be created for that class.

For more information about memory types, see Memory types and memory attributes, 
page 18.

A function with 

extern

 

"C"

 linkage is compatible with a function that has C++ linkage.

extern "C" {

  typedef void (*fpC)(void); // A C function typedef

};

void (*fpCpp)(void);         // A C++ function typedef

fpC f1;

fpCpp f2;

void f(fpC);

f(f1);                       // Always works

f(f2);                       // fpCpp is compatible with fpC

There are operators for 

new

 and 

delete

 for each memory that can have a heap, that is, 

tiny, near, far, and huge memory.

These examples assume that there is a heap in both near and far memory.

void _ _near * operator new _ _near (_ _near_size_t);

void _ _tiny  * operator new _ _tiny (_ _tiny_size_t);

void operator delete(void _ _near *);

void operator delete(void _ _tiny  *);

And correspondingly for array 

new

 and 

delete

 operators:

void _ _near * operator new[] _ _near (_ _near_size_t);

void _ _tiny  * operator new[] _ _tiny (_ _tiny_size_t);

void operator delete[](void _ _near *);

void operator delete[](void _ _tiny  *);