Solved

CreateProcess resource allocation issue

Posted on 2004-04-30
4
199 Views
Last Modified: 2010-04-05
Hi,

I am creating a process from my Delphi 7 application. I wait for it to complete and then continue execution of my program. Here is my code:

FillChar(StartupInfo, SizeOf(StartupInfo), 0);
FillChar(ProcessInfo, SizeOf(ProcessInfo), 0);
if CreateProcess(nil, PChar(CommandLine), nil, nil, True, 0, nil, nil, StartupInfo, ProcessInfo) then
  repeat
    Application.ProcessMessages;
    GetExitCodeProcess(ProcessInfo.hProcess, ExitCode);
  until (ExitCode <> STILL_ACTIVE) or Application.Terminated;

It works fine. My problem is that Memory Sleuth indicates that there is a Thread Handle and a Process Handle still allocated once my application terminates.

My question is, how do I free these resources?

Regards,

Bill
0
Comment
Question by:wipnav
  • 3
4 Comments
 
LVL 17

Expert Comment

by:geobul
ID: 10961724
Hi,

Add these two lines at the end of your code:

CloseHandle(ProcessInfo.hProcess);
CloseHandle(ProcessInfo.hThread );

Regards, Geo
0
 
LVL 17

Accepted Solution

by:
geobul earned 250 total points
ID: 10961750
if CreateProcess(nil, PChar(CommandLine), nil, nil, True, 0, nil, nil, StartupInfo, ProcessInfo) then
  try
    repeat
      Application.ProcessMessages;
      GetExitCodeProcess(ProcessInfo.hProcess, ExitCode);
    until (ExitCode <> STILL_ACTIVE) or Application.Terminated;
  finally
    CloseHandle(ProcessInfo.hProcess);
    CloseHandle(ProcessInfo.hThread );
  end;

Regards, Geo
0
 
LVL 1

Author Comment

by:wipnav
ID: 10961914
Geo,

Perfect!

Thank you very much.

Regards,

Bill
0
 
LVL 17

Expert Comment

by:geobul
ID: 10962050
You are welcome :-)
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Working this component WebCopy with proxy, help 3 92
Create a path if not exists 7 92
Delphi: Connect to running MS Outlook 4 123
Multi-layered image in FireMonkey 9 49
A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question