Function gio_sys::g_pollable_output_stream_write_nonblocking

pub unsafe extern "C" fn g_pollable_output_stream_write_nonblocking(
    stream: *mut GPollableOutputStream,
    buffer: *mut u8,
    count: size_t,
    cancellable: *mut GCancellable,
    error: *mut *mut GError
) -> ssize_t