Memory management in Perl XS

To allocate memory in XS, use

void Newx(void* ptr, int nitems, type);
void Newxc(void* ptr, int nitems, type, cast);
void Newxz(void* ptr, int nitems, type);

Newx

Equivalent to malloc.

Newxc

Equivalent to malloc with a cast, for C++.

Newxz

Equivalent to calloc.

void New(int id, void* ptr, int nitems, type );
void Newz(int id, void* ptr, int nitems, type );
void Newc(int id, void* ptr, int nitems, type , cast );

There is also an interface to realloc

You can free the memory with something called Safefree.

Web links

• perlclib - Internal replacements for standard C library functions - Memory Management and String Handling