Is there a bug about shared memory?

[wddpfx]

The OpenMode defined as that:

But when we open a port , it will call function "open_port_internal" and annotation say "If the port doesn't exist in the system a port with port_id is created。otherwise the existing port is opened.“

But if the port is existing,with the openmode is ReadShared,. Now we open as ReadExclusive. So port_node->is_opened_read_exclusive become TRUE from FALSE. But "ReadShared (multiple listeners / multiple writers): Once a port is opened ReadShared cannot be opened ReadExclusive.", now a port is opened ReadShared we can open it ReadExclusive successful. Why?

[wddpfx]

#4634