Method emit_inc_ref

mypyc/codegen/emit.py:584–609

Increment reference count of C expression `dest`. For composite unboxed structures (e.g. tuples) recursively increment reference counts for each component. If rare is True, optimize for code size and compilation speed.

(self, dest: str, rtype: RType, *, rare: bool = False)

            )

    def emit_inc_ref(self, dest: str, rtype: RType, *, rare: bool = False) -> None:
        """Increment reference count of C expression `dest`.

        For composite unboxed structures (e.g. tuples) recursively
        increment reference counts for each component.

        If rare is True, optimize for code size and compilation speed.
        """
        if is_int_rprimitive(rtype):
            if rare:
                self.emit_line("CPyTagged_IncRef(%s);" % dest)
            else:
                self.emit_line("CPyTagged_INCREF(%s);" % dest)
        elif isinstance(rtype, RTuple):
            for i, item_type in enumerate(rtype.types):
                self.emit_inc_ref(f"{dest}.f{i}", item_type)
        elif isinstance(rtype, RVec):
            prefix = VEC_MACRO_PREFIX[rtype._ctype]
            self.emit_line(f"{prefix}_INCREF({dest});")
        elif not rtype.is_unboxed:
            # Always inline, since this is a simple but very hot op
            if rtype.may_be_immortal or not HAVE_IMMORTAL:
                self.emit_line("CPy_INCREF(%s);" % dest)
            else:
                self.emit_line("CPy_INCREF_NO_IMM(%s);" % dest)
        # Otherwise assume it's an unboxed, pointerless value and do nothing.

    def emit_dec_ref(
        self, dest: str, rtype: RType, *, is_xdec: bool = False, rare: bool = False