Macro rorm::spawn_fut

macro_rules! spawn_fut {
    ($fut:expr, $cb_missing_rt:stmt, $cb_runtime_error:expr) => { ... };
}

This macro is used to simplify pushing futures to the runtime.

Parameter:

• $fut: Future to push to the runtime.
• $cb_missing_rt: Callback to execute if the runtime is missing.
• $cb_runtime_error: Function to execute if the runtime could not be locked. Takes String as parameter.