Strategized Locking

• Dealing with Mutation Pattern

• Enables it to use various locking strategies as replaceable components.

• Is the application of the strategy pattern to locking.

Idea

• You want to use your library in various domains.
• Depending on the domain, you want to use exclusive locking, shared locking, or no locking.
• Configure your locking strategy at compile time or run time.

Advantages

• Run-time polymorphism
  • Enables it to change the locking strategy during run time.
• Compile-time polymorphism
  • No cost at run time
  • Producer flatters object hierarchies

Disadvantages

• Run-time polymorphism
  • Needs a pointer indirection.
• Compile-time polymorphism
  • Produces in the error case a quite challenging to understand error message (when no concepts are used)