lua.wetgenes.gamecake.zone.scene.systems.cocall
scene:systems_cocall(fname,...)
For every system call the function called fname inside a coroutine like so.
system[fname](system,...)
This function can yield and should do so if it is waiting for another system to do something. All coroutines will be run in a round robin style until they all complete.
Returns the number of calls made, which will be the number of systems that had an fname function to call.
If fname is a function then it will be called as if it was a method.