From: Ron Fox <fox@...>
Date: 2008-02-22T19:59:56+09:00
Subject: Re: Newbie Mem Leak Issue

Dunno about the memory leak but are you aware that in get_files, you 
only go one level of sub-directory deep, rather than down the whole 
depth of the directory tree e.g. (with apologies to the excellent
Xwin32 product):

if I have:
c:\program files\
    +-->   Starnet
              +---->xwin32
                  +-----> xwin32.exe

I'll never see xwin32.exe in the list of files?
If you want full depth my suggestion is that you
recursively call get_files (when it encounters a directory)
and then append the results it returns to the original result.

Ron.

Keith Barr wrote:
> I am fairly new to Ruby and a program that I have created seems to have
> a memory leak.  I have generated a small program which does the basics
> of my program that leaks, and the test program also seems to leak.  Can
> anyone spot the design flaw?
> 
> Any help you can provide is greatly appreciated.
> 
> Thanks,
> Keith
> 
> 
> =================================
> class LeakTest
>   def initialize
>     print("initialized\n")
>     # fill up the standard 8M of space so the leak becomes apparent
> faster
>     str = "0123456789 0123456789 0123456789 0123456789 0123456789
> 0123456789 0123456789 0123456789 0123456789 0123456789 "
>     @huge_mem = Array.new(1000000, str)
>   end
> 
>   def get_files(pathname)
>     listing = Array.new
> 
>     Dir.glob("#{pathname}/*",0) do |f|
>       # add the files
>       listing << f
>       # now add directories.
>       if(File.directory?(f))
>         returnlist = get_files(f)
>         returnlist.each {|filename| listing << filename }
>       end
>     end
>     return listing
>   end
> 
>   include GC
>   def cleanup
>     printf("cleaning up")
>     GC.start
>     5.times do
>       print"."
>       sleep(1)
>     end
>     print"\n"
>   end
> 
>   def monitor
>     listing = get_files("C:/Program Files")
>     printf("Found %d files\n", listing.length)
>     5.times do
>       print"."
>       sleep(1)
>     end
>     print"\n"
>   end
> end
> 
> lt = LeakTest.new
> while true
>   lt.monitor
>   lt.cleanup
> end
> ==========================================