Skip to main content

AsyncReadManagedAt

compio::io

Trait AsyncReadManagedAt 

pub trait AsyncReadManagedAt {
    type Buffer: IoBuf;

    // Required method
    async fn read_managed_at(
        &self,
        len: usize,
        pos: u64,
    ) -> Result<Option<Self::Buffer>, Error>;
}
Available on crate feature io only.
Expand description

§AsyncReadAtManaged

Async read with buffer pool and position

Required Associated Types§

type Buffer: IoBuf

Filled buffer type

Required Methods§

async fn read_managed_at( &self, len: usize, pos: u64, ) -> Result<Option<Self::Buffer>, Error>

Read some bytes from this source at position and return a Self::Buffer.

Returning Ok(None) is similar to Ok(0) for normal AsyncReadAt.

§Implementation Note
  • If len == 0, implementation should use buffer’s size as len
  • 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.

Implementors§