__UNCONST(3) | Library Functions Manual | __UNCONST(3) |
__UNCONST
—
#include <sys/cdefs.h>
void
__UNCONST
(x);
void
__UNVOLATILE
(x);
__UNCONST
() macro can be used to omit warnings
produced by certain compilers when operating with pointers declared with the
const type qualifier in a context without such qualifier.
Examples include passing a pointer declared with the const
qualifier to a function without such qualifier, and variable assignment from a
const pointer to a non-const pointer. In the same vein, the
__UNVOLATILE
() macro can be used to exclude warnings
related to the volatile type qualifier.
__UNCONST
() involve an API that does not follow the
so-called ``const correctness'' even if it would be appropriate. Valid use
cases of __UNVOLATILE
() include passing a
volatile pointer to
memset(3).
Use of this macro is non-portable; this is part of the implementation namespace and should only be used in NetBSD code.
October 17, 2013 | NetBSD 9.0 |