The default implementation of can_poll always returns %TRUE.
The default implementation of write_nonblocking calls
g_pollable_output_stream_is_writable(), and then calls
g_output_stream_write() if it returns %TRUE. This means you only
need to override it if it is possible that your is_writable
implementation may return %TRUE when the stream is not actually
writable.
The default implementation of writev_nonblocking calls
g_pollable_output_stream_write_nonblocking() for each vector, and converts
its return value and error (if set) to a #GPollableReturn. You should
override this where possible to avoid having to allocate a #GError to return
%G_IO_ERROR_WOULD_BLOCK.
The interface for pollable output streams.
The default implementation of
can_pollalways returns %TRUE.The default implementation of
write_nonblockingcalls g_pollable_output_stream_is_writable(), and then calls g_output_stream_write() if it returns %TRUE. This means you only need to override it if it is possible that youris_writableimplementation may return %TRUE when the stream is not actually writable.The default implementation of
writev_nonblockingcalls g_pollable_output_stream_write_nonblocking() for each vector, and converts its return value and error (if set) to a #GPollableReturn. You should override this where possible to avoid having to allocate a #GError to return %G_IO_ERROR_WOULD_BLOCK.