tree c047a918a8db448b78ad606a8d504ef79366e4d7
parent 18fe17451f08d5ef394613faa9367c06cfd44561
author Vernon Mauery <vernon.mauery@linux.intel.com> 1537904065 -0700
committer William A. Kennington III <wak@google.com> 1538088490 +0000

Allow copy constructor/assignment operator for message::message

This change enables copies and assignments of messages, specifically,
copy constructors and copy assignment operators and the default empty
constructor. A boost::asio::yield_context needs to be able to store the
result of the async operation (a message::message) in a helper struct,
which results in a default construction (with a null msg_t) and later an
assignment to replace it when the result is ready. But adding the
appropriate sd_bus_message_ref/unref calls makes this possible.

While the default-constructed object does not sit around for long, this
change also adds in some asserts to catch any invalid accesses of the
object in that state.

Change-Id: I2059cb677fc5a30a3c7e3c2b81ed4199e5460dde
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>