Method blocking_splice

crates/wasi-io/src/impls.rs:219–246

(
        &mut self,
        dest: Resource<DynOutputStream>,
        src: Resource<DynInputStream>,
        len: u64,
    )

    }

    async fn blocking_splice(
        &mut self,
        dest: Resource<DynOutputStream>,
        src: Resource<DynInputStream>,
        len: u64,
    ) -> StreamResult<u64> {
        let len = len.try_into().unwrap_or(usize::MAX);

        let permit = {
            let output = self.get_mut(&dest)?;
            output.write_ready().await?
        };
        let len = len.min(permit);
        if len == 0 {
            return Ok(0);
        }

        let contents = self.get_mut(&src)?.blocking_read(len).await?;

        let len = contents.len();
        if len == 0 {
            return Ok(0);
        }

        let output = self.get_mut(&dest)?;
        output.blocking_write_and_flush(contents).await?;
        Ok(len.try_into().expect("usize can fit in u64"))
    }
}

impl streams::HostInputStream for ResourceTable {