task‘s source tag.
You can use this to tag a task return
value with a particular pointer (usually a pointer to the function
doing the tagging) and then later check it using
g_task_get_source_tag() (or g_async_result_is_tagged()) in the
task’s “finish” function, to figure out if the response came from a
A macro wrapper around this function will automatically set the
task’s name to the string form of
source_tag if it’s not already
set, for convenience.
Available since: 2.36