-#define xbt_matrix_get_as(mat,l,c,type) *(type*)xbt_matrix_getp(mat,l,c)
-
-xbt_matrix_t xbt_matrix_new(int lines, int rows,
- const unsigned long elmsize,
- void_f_pvoid_t * const free_f);
-void xbt_matrix_free(xbt_matrix_t matrix);
-void xbt_matrix_free_voidp(void *d);
+#define xbt_matrix_get_as(mat,l,c,type) *(type*)xbt_matrix_get_ptr(mat,l,c)