Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

Re: Timing of garbage collection

by muba (Priest)
on Jan 18, 2013 at 20:40 UTC ( #1014120=note: print w/ replies, xml ) Need Help??


in reply to Timing of garbage collection

As long as you keep references around to your objects, you'll be able to access them through those references, wherever they may live. Could be deep down some data structure, or maybe even in a closure — as long as parts of your code still have access to those references, those parts of the code will have access to the objects.

Ergo, as soon as an object is ready for garbage collection (i.e., you no longer have references pointing to them), no part of your code will be able to access those objects (I'm cutting corners here, because there's still the thing of weak references, but that's irrelevant to the discussion).

So if Outside Force throws an object index at you that has been used before and it is meant to represent the same object as before, then I hope you still have a reference to that object. However, if the non-new object index is a new object, and you don't have a reference to the old object around any more, then there's no problem at all. Whether or not perl has already garbage collected the old object, you won't be able to access it any more anyway.

So in the end, it's all your responsibility.

  • Keep references to those objects that you will need again later, and you'll be able to get to those objects;
  • Remove references to the objects that you're done with. Then, even when the Outside Force reuses an old index, you'll still be forced to create a fresh new object because as far as your code is concerned, the old object isn't anywhere to be found any longer


Comment on Re: Timing of garbage collection

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1014120]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (9)
As of 2014-09-18 12:45 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    How do you remember the number of days in each month?











    Results (114 votes), past polls