Sets @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
particular place.
Sets @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 particular place.