pub trait AsyncReadManaged {
type Buffer: IoBuf;
// Required method
async fn read_managed(
&mut self,
len: usize,
) -> Result<Option<Self::Buffer>, Error>;
}Available on crate feature
io only.Expand description
§AsyncReadManaged
Async read with buffer pool
Required Associated Types§
Required Methods§
Sourceasync fn read_managed(
&mut self,
len: usize,
) -> Result<Option<Self::Buffer>, Error>
async fn read_managed( &mut self, len: usize, ) -> Result<Option<Self::Buffer>, Error>
Read some bytes from this source and return a Self::Buffer.
Returning Ok(None) is similar to Ok(0) for normal AsyncRead.
§Implementation Note
- If
len== 0, implementation should use buffer’s size aslen - if
len> 0,min(len, buffer_size)will be the max number of bytes to be read.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.