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4K Memory Leak Solution

 
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Rubes_sw
Valued Contributor
Valued Contributor


Joined: 11 Jun 2001
Posts: 625
Location: Northern Ireland

PostPosted: Sun Mar 02, 2003 10:42 pm    Post subject: 4K Memory Leak Solution Reply with quote

I have found that the following produces a 4k Memory Leak every 1 second or so.

Code:

:evloop
wait event,1
goto @event()

:timer
if @equal(@dlgtext(check1),1)
dialog enable,edit1
else
dialog enable,edit1
end
goto evloop


Once i removed the above timer code.... My memory leak disappered. I think it may have something to do with enabling and disabling a dialog. The same happened when i tried Dialog remove Edit1, Dialog Add Edit 2

I know there has been discussions about a memory leak being caused by lists, but in my program i am using up-to 11 lists and there is no memory leak now once i removed the timer code !

Nathan
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Mac
Professional Member
Professional Member


Joined: 08 Jul 2000
Posts: 1585
Location: Oklahoma USA

PostPosted: Mon Mar 03, 2003 9:26 am    Post subject: Reply with quote

The memory leak caused by LIST SAVEFILE only shows
up if the list being saved is over 20k or so (lists smaller
than 20k don't cause a memory leak when saved). And
it doesn't matter if a TIMER event is used or not...

Here's the test code if ya wanna check it out. Wink
_______________________________________________________________________________________________________________________________________________________________________________________
Code:

rem -- A test program to show SAVEFILE memory leak --
rem -- Loads Tlist with approx 40k of data and saves as mem_leak.dat
rem -- every 5 seconds. Shows available free memory at start of
rem -- operation, and monitors current free memory every second.

OPTION SCALE, 96
OPTION DECIMALSEP, "."
TITLE By Mac
DIALOG CREATE,"SAVEFILE Memory leak Test",-1,-1,385,160
  DIALOG ADD,TEXT,CurrentStatus,8,5,,,""
  DIALOG ADD,TEXT,StartStatus,29,5,,,"Press 'Start' button to begin..."

  DIALOG ADD,BUTTON,Start,5,300,80,20
  DIALOG ADD,BUTTON,Stop,26,300,80,20

  DIALOG ADD,LIST,Tlist,50,5,375,100,
DIALOG SHOW

rem -- Put horizontal slider on list --
%x = @sendmsg(@winexists(~Tlist),$0194,2000,0)

rem -- Creat a list of useless info --
%x = 0
REPEAT
  LIST ADD, Tlist, @datetime(yyyy/mm/dd hh:nn am/pm) This is an example program to show the memory leak in VDS SAVEFILE operations.
  %x = @succ(%x)
UNTIL @greater(%x, 400)

%x = 0

:EVLOOP
  %x = @succ(%x)
  WAIT 1, EVENT
  goto @event()

:TIMER
  DIALOG SET, CurrentStatus, @datetime(hh:nn:ss am/pm)"  Current Free Memory - "@sysinfo(FREEMEM) kb
  rem -- Check every 5 seconds --
  if @greater(%x, 5)
     if @equal(%s, "start")
        DIALOG SET, CurrentStatus, @datetime(hh:nn:ss am/pm)"  Current Free Memory - "@sysinfo(FREEMEM) kb" Saving..."
        LIST SAVEFILE, Tlist, mem_leak.dat
     end
     %x = 0
  end
  goto EVLOOP

:StartBUTTON
  %s = "start"
  DIALOG SET, StartStatus, "Free Memory At "@datetime(hh:nn:ss am/pm)" Start - "@sysinfo(FREEMEM) kb
  goto EVLOOP

:StopBUTTON
  %s = "stop"
  DIALOG SET, StartStatus, "Press 'Start' button to begin..."
  goto EVLOOP

:CLOSE
  EXIT
  STOP

Cheers, Mac Smile

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