Class: CachingRegistry

• Inheritance
• Description
• Related information
• Instance protocol
  • private
  • registering objects

Inheritance:

   Object
   |
   +--Registry
      |
      +--CachingRegistry

Package:

stx:libbasic

Category:

System-Support

Version:

rev: 1.1 date: 1999/07/22 23:17:43

user: cg

file: CachingRegistry.st directory: libbasic

module: stx stc-classLibrary: libbasic

Author:

Claus Gittinger (cg@exept)

Description:

A CachingRegistry behaves generally like a registry;
However, it keeps hard references to the last n registered objects,
preventing them from being garbage collected (and finalized).
This is useful for resources, which do not cost too much memory,
but are expensive to allocate - a special canditate of this kind are
XFonts. With a CachingRegistry, fonts are kept a bit longer alive
and can therefore often be reused - even if temporarily unreferenced.

This is kind of experimental.




[instance variables:]
    keptObjects             Collection      hard referenced objects
    cacheSize               Integer         number of hard references

[class variables:]

Related information:

Instance protocol:

 cacheSize: aNumber

 register: anObject as: aHandle

 repairTally

 unregister: anObject atIndex: index