Gets the result of
task as a
GValue, and transfers ownership of
that value to the caller. As with g_task_return_value(), this is
a generic low-level method;
g_task_propagate_pointer() and the like
will usually be more useful for C code.
If the task resulted in an error, or was cancelled, then this will
error and return
Since this method transfers ownership of the return value (or error) to the caller, you may only call it once.
Available since: 2.64
Return location for the
The argument will be set by the function. The data is owned by the instance.
The return location for a recoverable error.
The argument can be
If the return location is not
NULL, then you must initialize it to a
The argument will be left initialized to
NULLby the method if there are no errors.
In case of error, the argument will be set to a newly allocated
GError; the caller will take ownership of the data, and be responsible for freeing it.