drive

fn drive() -> int

use io::{drive};

Deprecated: polls the registered IO waiters once and returns how many became ready.

Calling it gives warning E0129. Run concurrent IO as tasks instead (task::scope with spawn and join): an IO wait inside a task suspends only that task.

Returns#

int

Examples#

use io::{drive};
let ready = drive(); // warning E0129: `drive` is deprecated

See also#

• task::scope
• stdin: Returns a new stream on the process’s standard input.
• stdout: Returns a new stream on the process’s standard output.
• stderr: Returns a new stream on the process’s standard error.
• capture_begin: Starts keeping this thread’s stdout and stderr writes in memory instead of writing them, until the matching capture_end().
• capture_end: Ends the innermost capture_begin() and returns what it kept, as (stdout, stderr).
• open: Opens the file at path with mode and returns a stream on it.
• close: Closes s.