Adding a finalizer to a ruby object

Ruby IronRuby
1

Hi

How do I add a finalizer to a ruby object?

I’ve tried using ObjectSpace and define_finalizer.
But the proc never got executed when I called
ObjectSpace.garbage_collect
Calling System::GC.collect had the same outcome

and implementing a Finalize method doesn’t seem to have any effect
either

class MyClass

def Finalize
puts “in Finalize”
end

def finalize
puts “in lower finalize”
end

end

MyClass.new
System::GC.collect System::GC.max_generation,
System::GCCollectionMode.forced
#ObjectSpace.garbage_collect

Thanks

Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz
Google Wave: [email protected]
Twitter: http://twitter.com/casualjim
Author of IronRuby in Action (http://manning.com/carrero)

2

Garbage collection in Ruby is kind of tricky.

3

Ivan Porto carrero wrote:

Hi

How do I add a finalizer to a ruby object?

I’ve tried using ObjectSpace and define_finalizer.
But the proc never got executed when I called
ObjectSpace.garbage_collect
Calling System::GC.collect had the same outcome

and implementing a Finalize method doesn’t seem to have any effect
either

class MyClass

def Finalize
puts “in Finalize”
end

def finalize
puts “in lower finalize”
end

end

What about using a proc, or block and running finalize after yield or
proc.call?

-Sam

4

Ivan, I’m not sure but I’ve asked the rest of the team and someone will
get back to you shortly.

~Jimmy

On Jan 11, 2010, at 12:00 AM, “Ivan Porto C.”
<[email protected]mailto:[email protected]> wrote:

I specifically wanted to find a counterpart for this C#

public class SomeClass {

private object _unmanagedResource;

public SomeClass(object unmanagedResource){
_unmanagedResource = unmanagedResource;
}

~SomeClass(){
_unmanagedResource.Cleanup();
_unmanagedResource = null;
}
}

I was writing about the dispose pattern and wanted to include a full
counterpart implementation with a finalizer for unmanaged resources.

Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz http://flanders.co.nz
Twitter: http://twitter.com/casualjim http://twitter.com/casualjim
Author of IronRuby in Action
(http://manning.com/carrerohttp://manning.com/carrero)

On Mon, Jan 11, 2010 at 6:12 AM, Sam Clopton
<mailto:[email protected][email protected]mailto:[email protected]>
wrote:
Ivan Porto carrero wrote:

either

end

What about using a proc, or block and running finalize after yield or
proc.call?

-Sam

Posted via http://www.ruby-forum.com/ http://www.ruby-forum.com/.

Ironruby-core mailing list
mailto:[email protected][email protected]mailto:[email protected]
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Ironruby-core mailing list
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5

I specifically wanted to find a counterpart for this C#

public class SomeClass {

private object _unmanagedResource;

public SomeClass(object unmanagedResource){
_unmanagedResource = unmanagedResource;
}

~SomeClass(){
_unmanagedResource.Cleanup();
_unmanagedResource = null;
}
}

I was writing about the dispose pattern and wanted to include a full
counterpart implementation with a finalizer for unmanaged resources.

Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz
Twitter: http://twitter.com/casualjim
Author of IronRuby in Action (http://manning.com/carrero)

6

oh if that is the case can they also get back to me with overriding an
indexer
(http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3392)?
I think that would result in a complete chapter with regards to CLR
interop.

Thanks a lot :smiley:

Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz
Twitter: http://twitter.com/casualjim
Author of IronRuby in Action (http://manning.com/carrero)

On Mon, Jan 11, 2010 at 9:44 AM, Jimmy S. <

7

We don’t support finalizers yet, but it shouldn’t be too much work to
make ObjectSpace#define_finalizer work with Ruby objects. We might also
consider providing some means to override CLR Finalize method.

Tomas

From: [email protected]
[mailto:[email protected]] On Behalf Of Jimmy
Schementi
Sent: Monday, January 11, 2010 12:45 AM
To: [email protected]
Subject: Re: [Ironruby-core] Adding a finalizer to a ruby object

Ivan, I’m not sure but I’ve asked the rest of the team and someone will
get back to you shortly.

~Jimmy

On Jan 11, 2010, at 12:00 AM, “Ivan Porto C.”
<[email protected]mailto:[email protected]> wrote:
I specifically wanted to find a counterpart for this C#

public class SomeClass {

private object _unmanagedResource;

public SomeClass(object unmanagedResource){
_unmanagedResource = unmanagedResource;
}

~SomeClass(){
_unmanagedResource.Cleanup();
_unmanagedResource = null;
}
}

I was writing about the dispose pattern and wanted to include a full
counterpart implementation with a finalizer for unmanaged resources.

Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz
Twitter: http://twitter.com/casualjim
Author of IronRuby in Action (http://manning.com/carrero)

On Mon, Jan 11, 2010 at 6:12 AM, Sam Clopton
<[email protected]mailto:[email protected]> wrote:
Ivan Porto carrero wrote:

either

end

What about using a proc, or block and running finalize after yield or
proc.call?

-Sam

Posted via http://www.ruby-forum.com/.

Ironruby-core mailing list
[email protected]mailto:[email protected]
http://rubyforge.org/mailman/listinfo/ironruby-core

Ironruby-core mailing list
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http://rubyforge.org/mailman/listinfo/ironruby-core