1use std::io::Result;
2use std::pin::Pin;
3use std::task::{Context, Poll};
4
5use futures_lite::AsyncWrite;
6
7use crate::external::write_access_handle;
8
9impl AsyncWrite for crate::File {
10 fn poll_write(
11 mut self: Pin<&mut Self>,
12 _cx: &mut Context<'_>,
13 buf: &[u8],
14 ) -> Poll<Result<usize>> {
15 let written = write_access_handle(&self.access, buf, self.offset);
16 self.offset += written;
17 Poll::Ready(Ok(written as usize))
18 }
19
20 fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>> {
21 Poll::Ready(self.access.flush().map_err(crate::from_js_error))
22 }
23
24 fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>> {
25 self.access.close();
26 Poll::Ready(Ok(()))
27 }
28}