One License Per User at a Time

VTube licenses are designed to be used by one user at a time.

However, we have also designed a license of VTube to run in RDS (Remote Desktop Services). (The legacy term is “terminal services.” Microsoft changed the term in 2008.)

Effectively Creates One Floating License

This effectively allows for one license to float in a Windows Server environment.

Here is How it Works

If an instance of VTube is being served, VTube will check to see if another instance is already running.  It knows how to check for all instances running on the server.

1. If there are no other instances running, then VTube start and create a global Windows Mutex (Mutual Exclusion) locking thread that indicates that it is running.
    
2. If a user logs into the server and attempts to run a second instance while the first instance is running, then VTube will display this message:

Mutex Lock Cleared

Then, as soon as the first instance is unloaded the global mutex lock is cleared,  the second user can now start VTube from the server.  So, this effectively allows for a one-user floating license when run from a Microsoft Server.

Stale Locks Prevented

Stale locks are locks that prevent another instance from loading even when the first instance has shutdown.

Because of the design of the Windows Mutex system, stale locks are not possible.

Suggestion: Be Courteous to Other Users by Closing VTube When You are Finished With It

If you cannot load an instance, then contact the other users and ask them to close the instance of VTube when they are not using it.  Ask all users to close VTube when not using it.