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 g_initable_init() instead.
This method is intended for language bindings. If writing in C,
g_async_initable_new_async() should typically be used instead.
When the initialization is finished, @callback will be called. You can
then call g_async_initable_init_finish() 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.
As with #GInitable, if the object is not initialized, or initialization
returns with an error, then all operations on the object except
g_object_ref() and g_object_unref() are considered to be invalid, and
have undefined behaviour. They will often fail with g_critical() or
g_warning(), but this must not be relied on.
Callers should not assume that a class which implements #GAsyncInitable can
be initialized multiple times; for more information, see g_initable_init().
If a class explicitly supports being initialized multiple times,
implementation requires yielding all subsequent calls to init_async() on the
results of the first call.
For classes that also support the #GInitable interface, the default
implementation of this method will run the g_initable_init() function
in a thread, so if you want to support asynchronous initialization via
threads, just implement the #GAsyncInitable interface without overriding
any interface methods.
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 g_initable_init() instead.
This method is intended for language bindings. If writing in C, g_async_initable_new_async() should typically be used instead.
When the initialization is finished, @callback will be called. You can then call g_async_initable_init_finish() 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.
As with #GInitable, if the object is not initialized, or initialization returns with an error, then all operations on the object except g_object_ref() and g_object_unref() are considered to be invalid, and have undefined behaviour. They will often fail with g_critical() or g_warning(), but this must not be relied on.
Callers should not assume that a class which implements #GAsyncInitable can be initialized multiple times; for more information, see g_initable_init(). If a class explicitly supports being initialized multiple times, implementation requires yielding all subsequent calls to init_async() on the results of the first call.
For classes that also support the #GInitable interface, the default implementation of this method will run the g_initable_init() function in a thread, so if you want to support asynchronous initialization via threads, just implement the #GAsyncInitable interface without overriding any interface methods.