Trait gio::prelude::PollableOutputStreamExtManual

source · 
pub trait PollableOutputStreamExtManual: Sealed + IsA<PollableOutputStream> {
    // Provided methods
    fn create_source<F, C>(
        &self,
        cancellable: Option<&C>,
        name: Option<&str>,
        priority: Priority,
        func: F,
    ) -> Source
       where F: FnMut(&Self) -> ControlFlow + 'static,
             C: IsA<Cancellable> { ... }
    fn create_source_future<C: IsA<Cancellable>>(
        &self,
        cancellable: Option<&C>,
        priority: Priority,
    ) -> Pin<Box<dyn Future<Output = ()> + 'static>> { ... }
    fn create_source_stream<C: IsA<Cancellable>>(
        &self,
        cancellable: Option<&C>,
        priority: Priority,
    ) -> Pin<Box<dyn Stream<Item = ()> + 'static>> { ... }
    fn writev_nonblocking(
        &self,
        vectors: &[OutputVector<'_>],
        cancellable: Option<&impl IsA<Cancellable>>,
    ) -> Result<(PollableReturn, usize), Error> { ... }
    fn into_async_write(self) -> Result<OutputStreamAsyncWrite<Self>, Self>
       where Self: IsA<PollableOutputStream> { ... }
}

Provided Methods§

source

fn create_source<F, C>( &self, cancellable: Option<&C>, name: Option<&str>, priority: Priority, func: F, ) -> Source
where F: FnMut(&Self) -> ControlFlow + 'static, C: IsA<Cancellable>,

Creates a #GSource that triggers when @self can be written, or @cancellable is triggered or an error occurs. The callback on the source is of the #GPollableSourceFunc type.

As with g_pollable_output_stream_is_writable(), it is possible that the stream may not actually be writable even after the source triggers, so you should use g_pollable_output_stream_write_nonblocking() rather than g_output_stream_write() from the callback.

The behaviour of this method is undefined if g_pollable_output_stream_can_poll() returns false for @self.

§cancellable

a #GCancellable, or None

§Returns

a new #GSource

source

fn create_source_future<C: IsA<Cancellable>>( &self, cancellable: Option<&C>, priority: Priority, ) -> Pin<Box<dyn Future<Output = ()> + 'static>>

source

fn create_source_stream<C: IsA<Cancellable>>( &self, cancellable: Option<&C>, priority: Priority, ) -> Pin<Box<dyn Stream<Item = ()> + 'static>>

source

fn writev_nonblocking( &self, vectors: &[OutputVector<'_>], cancellable: Option<&impl IsA<Cancellable>>, ) -> Result<(PollableReturn, usize), Error>

Available on crate feature v2_60 only.

Attempts to write the bytes contained in the @n_vectors @vectors to @self, as with g_output_stream_writev(). If @self is not currently writable, this will immediately return %@G_POLLABLE_RETURN_WOULD_BLOCK, and you can use g_pollable_output_stream_create_source() to create a #GSource that will be triggered when @self is writable. @error will not be set in that case.

Note that since this method never blocks, you cannot actually use @cancellable to cancel it. However, it will return an error if @cancellable has already been cancelled when you call, which may happen if you call this method after a source triggers due to having been cancelled.

Also note that if PollableReturn::WouldBlock is returned some underlying transports like D/TLS require that you re-send the same @vectors and @n_vectors in the next write call.

The behaviour of this method is undefined if g_pollable_output_stream_can_poll() returns false for @self.

§vectors

the buffer containing the #GOutputVectors to write.

§cancellable

a #GCancellable, or None

§Returns

%@G_POLLABLE_RETURN_OK on success, PollableReturn::WouldBlock if the stream is not currently writable (and @error is not set), or PollableReturn::Failed if there was an error in which case @error will be set.

§bytes_written

location to store the number of bytes that were written to the stream

source

fn into_async_write(self) -> Result<OutputStreamAsyncWrite<Self>, Self>
where Self: IsA<PollableOutputStream>,

Object Safety§

This trait is not object safe.

Implementors§