Generally, keeping state in global data is a design mistake. And simply changing the global state from global variables to a global hash doesn't fix it.

Instead you should re-think the design of your program. Some relevant general software design tips taken from On Coding Standards and Code Reviews that might help are:

• Coupling and Cohesion. Systems should be designed as a set of cohesive modules as loosely coupled as is reasonably feasible.
• Testability. Systems should be designed so that components can be easily tested in isolation.
• Design the module's interface first.
• Data hiding. Minimize the exposure of implementation details.
• Minimize the use of global data.
• Minimize the scope of variables, pragmas, etc..