yield

fn yield(ev: *Evented, pending_task: SwitchMessage.PendingTask) void {
    const thread: *Thread = .current();
    const message: SwitchMessage = .{
        .contexts = .{
            .old = thread.current_context.?,
            .new = &thread.main_context,
        },
        .pending_task = pending_task,
    };
    contextSwitch(&message).handle(ev);
}