Function with_ctrl_ring 

pub fn with_ctrl_ring<T, F>(closure: F) -> T
where
    F: FnOnce(&IoUring<Entry128>) -> T,

Execute a closure with access to the thread-local control ring

This function provides access to the control ring for read-only operations. The control ring must be initialized first via ublk_init_ctrl_task_ring() or by creating a UblkCtrl instance.

Arguments

• closure - A closure that receives &IoUring<squeue::Entry128> and returns T

Returns

The result of executing the closure

Panics

Panics if the control ring is not initialized

Examples

use libublk::{with_ctrl_ring, ublk_init_ctrl_task_ring};
use io_uring::{IoUring, squeue};
use std::os::fd::AsRawFd;

// Initialize the control ring first
ublk_init_ctrl_task_ring(|ring_opt| {
    if ring_opt.is_none() {
        *ring_opt = Some(IoUring::<squeue::Entry128>::builder().build(32)?);
    }
    Ok(())
})?;

// Now access it read-only
let fd = with_ctrl_ring(|ring| ring.as_raw_fd());
println!("Control ring fd: {}", fd);