wait

src/runner/runner.rs

@@ -23,12 +23,49 @@ impl std::fmt::Display for Error{
 }
 impl std::error::Error for Error{}
 
+fn coerce_float64(value:&mlua::Value)->Option<f64>{
+	match value{
+		&mlua::Value::Integer(i)=>Some(i as f64),
+		&mlua::Value::Number(f)=>Some(f),
+		_=>None,
+	}
+}
+fn scheduler_mut<T>(lua:&mlua::Lua,mut f:impl FnMut(&mut crate::scheduler::Scheduler)->mlua::Result<T>)->mlua::Result<T>{
+	let mut scheduler=lua.app_data_mut::<crate::scheduler::Scheduler>().ok_or(mlua::Error::runtime("Scheduler missing"))?;
+	f(&mut *scheduler)
+}
 fn init(lua:&mlua::Lua)->mlua::Result<()>{
 	lua.sandbox(true)?;
 
 	//global environment
 	let globals=lua.globals();
 
+	let schedule_thread=lua.create_function(move|lua,dt:mlua::Value|{
+		let delay=coerce_float64(&dt).ok_or(mlua::Error::runtime("Expected float"))?.max(0.0)*60.0;
+		if delay<u64::MAX as f64{
+			scheduler_mut(lua,|scheduler|{
+				scheduler.schedule_thread((delay as u64).max(2),lua.current_thread());
+				Ok(())
+			}).unwrap();
+		}
+		Ok(())
+	})?;
+	let wait_env=lua.create_table()?;
+	wait_env.raw_set("coroutine",lua.globals().raw_get::<mlua::Table>("coroutine")?)?;
+	wait_env.raw_set("schedule_thread",schedule_thread)?;
+	let wait=lua.load("
+		local coroutine_yield=coroutine.yield
+		local schedule_thread=schedule_thread
+		return function(dt)
+			schedule_thread(dt)
+			return coroutine_yield()
+		end
+	")
+	.set_name("wait")
+	.set_environment(wait_env)
+	.call::<mlua::Function>(())?;
+	globals.raw_set("wait",wait)?;
+
 	super::r#enum::set_globals(lua,&globals)?;
 	super::color3::set_globals(lua,&globals)?;
 	super::vector3::set_globals(lua,&globals)?;