[Bug 23155] New: Connection: refcount handles

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=23155

           Summary: Connection: refcount handles
           Product: Telepathy
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: telepathy-spec
        AssignedTo: telepathy-bugs at lists.freedesktop.org
        ReportedBy: simon.mcvittie at collabora.co.uk
            Blocks: 23148


Connection should perform distributed reference-counting for (at least Contact)
handles.

Proposed migration path:

* add client_unref_handle() method to TpHandleRepoIface

* change the semantics of HoldHandles to "always add one reference", and
ReleaseHandles to "remove all references owned by this client" (this is
compatible)

* change the semantics of GetContactAttributes to ref the handles rather than
holding them (this is compatible)

* add ReferenceHandles, UnreferenceHandles to Connection (only working on
Contact handles, perhaps); ReferenceHandles is not strictly necessary but is
more consistent

* augment TpBaseConnection and the Python equivalent to implement both sets of
D-Bus API

* when those changes are old enough to rely on, change clients to ref handles
instead of holding them

* in Telepathy 1.0 (Bug #23148), delete HoldHandles and ReleaseHandles

* when telepathy-glib API is broken, remove the supporting C API for
ReleaseHandles, and rename client_hold_handle() to client_ref_handle() to
reflect its new semantics


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