Re: sup****ting header-less blocks in memory allocators...

On Oct 2, 10:55=A0pm, "Chris M. Thomasson" <n...@[EMAIL PROTECTED]
> wrote:

> I think C++ is neat, but I have to sup****t C.


You can mimic this pattern in C:

#define ALLOC(T) \
  if (sizeof(T) <=3D 4) \
    return thread().fixed_alloc_4.alloc(); \
  if (sizeof(T) <=3D 8) \
    return thread().fixed_alloc_8.alloc(); \
  [...]
  else \
    return ::malloc(sizeof(T)) \
/**/

#define FREE(T, p) \
  if (sizeof(T) <=3D 4) \
    thread().fixed_alloc_4.free(p); \
  if (sizeof(T) <=3D 8) \
    thread().fixed_alloc_8.free(p); \
  [...]
  else \
    ::free(p) \
/**/


Usage:

struct my_obj_s
{
  int x, y;
};

typedef struct my_obj_s my_obj_t;

my_obj_t* x =3D ALLOC(my_obj_t);
....
FREE(my_obj_t, x);


It's still not global malloc/free, and user still have to supply exact
size of allocation to free(). But it's C.


Dmitriy V'jukov