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#!/usr/bin/env ruby
#
#
# VERY nice function from Robert Klemme to check memory leaks
# and check on what GC has collected since last call.
#
# Usage can be:
#
# require 'swig_gc'
#
# GC.stats
# # do some stuff..
# GC.start # collect and report stats
# # do some more...
# GC.stats # just report stats
#
# or:
#
# require 'swig_gc'
#
# GC.track_class = String # track just String classes
# GC.stats
# # do some stuff..
# GC.start # collect and report stats
# # do some more...
# GC.stats # just report stats
#
#
#
#
#
module GC
class << self
attr :last_stat
attr_accessor :track_class
alias :_start :start
def start
_start
stats if $VERBOSE
end
def stats
stats = Hash.new(0)
ObjectSpace.each_object {|o| stats[o.class] += 1}
if track_class
v = stats[track_class]
printf "\t%-30s %10d", track_class.to_s, v
if last_stat
printf " | delta %10d", (v - last_stat[track_class])
end
puts
else
stats.sort {|(k1,v1),(k2,v2)| v2 <=> v1}.each do |k,v|
printf "\t%-30s %10d", k, v
printf " | delta %10d", (v - last_stat[k]) if last_stat
puts
end
end
last_stat = stats
end
end
end
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