diff options
Diffstat (limited to 'tokio/src/io/async_read.rs')
| -rw-r--r-- | tokio/src/io/async_read.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tokio/src/io/async_read.rs b/tokio/src/io/async_read.rs index 2bccb17f..8f6e0b98 100644 --- a/tokio/src/io/async_read.rs +++ b/tokio/src/io/async_read.rs @@ -57,6 +57,11 @@ pub trait AsyncRead { /// /// This function is called from [`poll_read_buf`]. /// + /// # Safety + /// + /// Implementations that return `false` must never read from data slices + /// that they did not write to. + /// /// [`io::Read`]: std::io::Read /// [`poll_read_buf`]: #method.poll_read_buf unsafe fn prepare_uninitialized_buffer(&self, buf: &mut [u8]) -> bool { |