pausable-tokio 1.52.1

A fork of tokio that adds a runtime-controllable pause/resume primitive on its clock. Drop-in replacement for tokio with a few extra methods on the Builder and Runtime types.
Documentation 
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/// Marker for types that are `Sync` but not `Send`
#[allow(dead_code)]
pub(crate) struct SyncNotSend(#[allow(dead_code)] *mut ());

unsafe impl Sync for SyncNotSend {}

cfg_rt! {
    pub(crate) struct NotSendOrSync(#[allow(dead_code)] *mut ());
}