Struct esp_wifi::esp_now::SendWaiter

pub struct SendWaiter<'s>(/* private fields */);

This struct is returned by a sync esp now send. Invoking wait method of this struct will block current task until the callback function of esp now send is called and return the status of previous sending.

This waiter borrows the sender, so when used in multiple tasks, the lock will only be released when the waiter is dropped or consumed via wait.

When using a lock that disables interrupts, the waiter will block forever since the callback which signals the completion of sending will never be invoked.

Implementations

impl SendWaiter<'_>

pub fn wait(self) -> Result<(), EspNowError>

Wait for the previous sending to complete, i.e. the send callback is invoked with status of the sending.

Trait Implementations

impl Drop for SendWaiter<'_>

fn drop(&mut self)

wait for the send to complete to prevent the lock on EspNowSender get unlocked before a callback is invoked.