Is it possible to change the allocation area of automatic variables in C/C++? -

Is it possible to change the allocation area of automatic variables in C/C++? -

this theoretical question both c , c++.

i have 4x4 matrix type defined quite as:

typedef float matrix44[16];

i have many methods take matrix44 parameter, example:

bool matrixisidentity(matrix44 m);

i have custom memory allocation scheme in place whereby big area of memory pre-allocated on heap , manage allocations on prefetched memory manually. such have replaced/overloaded malloc/new own implementations. problem is, both custom malloc , new, nature, homecoming pointer, not object.

ordinarily, following:

// method 1 1] matrix44 mat = { ... }; 2] bool res = matrixisidentity(mat);

however, line 1 allocated mat on stack, not in custom memory area wish. alternative is:

// method 2 1] matrix44 *mmat = mymalloc(...); 1a] matrix44 *nmat = new ... 2] bool res = matrixisidentity(*mat);

the issue here have litter code dereference operators. 1 alternative rewrite methods take matrix44* instead, but, theoretical, assume not option.

therefore question becomes: there way declare automatic variable in c and/or c++ in method 1 line 1, have follow alternate allocation scheme (as in method 2 line 1)?

(i appreciate may involve compiler-related give-and-take have not added tags effect)

it not possible, automatic variables stack based. can whatever want within constructor. matrix44 lean wrapper around, say, matrix44impl point "custom" memory.

c++ c memory-management stack local-variables