gAsyncInitableInitAsync: gAsyncInitableInitAsync
Description
Starts asynchronous initialization of the object implementing the
interface. This must be done before any real use of the object after
initial construction. If the object also implements GInitable you can
optionally call gInitableInit instead.Usage
gAsyncInitableInitAsync(object, io.priority, cancellable = NULL, callback, user.data = NULL)
Arguments
io.priority
the I/O priority
of the operation.
user.data
the data to pass to callback function
Details
When the initialization is finished, callback will be called. You can
then call gAsyncInitableInitFinish to get the result of the
initialization.
Implementations may also support cancellation. If cancellable is not
NULL, then initialization can be cancelled by triggering the cancellable
object from another thread. If the operation was cancelled, the error
G_IO_ERROR_CANCELLED will be returned. If cancellable is not NULL and
the object doesn't support cancellable initialization the error
G_IO_ERROR_NOT_SUPPORTED will be returned.
If this function is not called, or returns with an error then all
operations on the object should fail, generally returning the
error G_IO_ERROR_NOT_INITIALIZED.
Implementations of this method must be idempotent, i.e. multiple calls
to this function with the same argument should return the same results.
Only the first call initializes the object, further calls return the result
of the first call. This is so that its safe to implement the singleton
pattern in the GObject constructor function.
For classes that also support the GInitable interface the default
implementation of this method will run the gInitableInit function
in a thread, so if you want to support asynchronous initialization via
threads, just implement the GAsyncInitable interface without overriding
any interface methods.
Since 2.22