_CLC_OVERLOAD _CLC_DECL long atom_dec(volatile global long *p);
_CLC_OVERLOAD _CLC_DECL unsigned long atom_dec(volatile global unsigned long *p);
_CLC_OVERLOAD _CLC_DECL long atom_dec(volatile local long *p);
_CLC_OVERLOAD _CLC_DECL unsigned long atom_dec(volatile local unsigned long *p);