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module ObjectSpace

Index:

_id2ref define_finalizer each_object garbage_collect undefine_finalizer

---

The ObjectSpace module contains a number of routines that interact with the garbage collection facility and allow you to traverse all living objects with an iterator.

ObjectSpace also provides support for object finalizers, procs that will be called when a specific object is about to be destroyed by garbage collection.

include ObjectSpace a = "A" b = "B" c = "C" define_finalizer(a, proc {|id| puts "Finalizer one on #{id}" }) define_finalizer(a, proc {|id| puts "Finalizer two on #{id}" }) define_finalizer(b, proc {|id| puts "Finalizer three on #{id}" })

produces:

Finalizer three on 537767360 Finalizer one on 537767510 Finalizer two on 537767510

class methods
_id2ref	ObjectSpace._id2ref( anId ) -> anObject
	Converts an object id to a reference to the object. May not be called on an object id passed as a parameter to a finalizer. s = "I am a string" � "I am a string" r = ObjectSpace._id2ref(s.id) � "I am a string" r == s � true
define_finalizer	ObjectSpace.define_finalizer( anObject, aProc=proc() )
	Adds aProc as a finalizer, to be called when anObject is about to be destroyed.
each_object	ObjectSpace.each_object( [ aClassOrMod ] ) {| anObj | block } -> aFixnum
	Calls the block once for each living, nonimmediate object in this Ruby process. If aClassOrMod is specified, calls the block for only those classes or modules that match (or are a subclass of) aClassOrMod. Returns the number of objects found. a = 102.7 b = 95 ObjectSpace.each_object(Numeric) {|x| p x } print "Total count: ", ObjectSpace.each_object {} ,"\n" produces: 102.7 2.718281828 3.141592654 Total count: 372
garbage_collect	ObjectSpace.garbage_collect -> nil
	Initiates garbage collection (see module GC on page 410).
undefine_finalizer	ObjectSpace.undefine_finalizer( anObject )
	Removes all finalizers for anObject.

---

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