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author | David Herrmann <dh.herrmann@gmail.com> | 2014-12-30 11:37:35 +0100 |
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committer | David Herrmann <dh.herrmann@gmail.com> | 2014-12-30 11:37:35 +0100 |
commit | d95eb43e90f19ff0c9aaff1c5fb1a7ed9fbd89a5 (patch) | |
tree | 87325a4eaa726f00809ced8090e7cf6b38b186ae /src/libsystemd/sd-utf8 | |
parent | 7d9fcc2bf6869993e5f38d5eb183fb59e8a52816 (diff) |
bus: add sd_bus_emit_object_{added/removed}()
This implements two new helpers, discussed on systemd-devel about 1 year
ago:
sd_bus_emit_object_added()
sd_bus_emit_object_removed()
Both calls are equivalent to their respective counterpart
sd_bus_emit_interfaces_{added/removed}(), but can figure out the list of
interfaces themselves, instead of requiring the caller to provide them.
Furthermore, both calls properly deal with builtin interfaces provided via
org.freedesktop.DBus.* and alike.
Both calls simply traverse a node and all its parent nodes to figure out a
list of all interfaces registered as vtable or fallback. It then appends
each of them, similar to the interfaces_{added/removed}() helpers.
Note that interfaces_{added/removed}() runs a parent traversal for *each*
passed interface. Therefore, it can simply bail out, once it found a
parent node that implements a given interface.
With object_{added/removed}() we cannot know the registered interfaces in
advance, thus, we cannot run one traversal per node. Instead, we run a
single traversal and remember all interfaces that we added. Therefore, a
child-interface overrides all conflicting parent-interfaces. We keep a
"Set *s" context to track those while climbing up the tree.
Diffstat (limited to 'src/libsystemd/sd-utf8')
0 files changed, 0 insertions, 0 deletions