?
Solved

Resume Terminated Thread - D7

Posted on 2006-11-08
4
Medium Priority
?
646 Views
Last Modified: 2008-03-15
Hi,

I was wondering if it is possible to resume execution or re-execute a thread after it is terminated. I have used Suspend and Resume which work but they cause the program to sometimes hang unpredictably preventing my program from closing therefore I decided not to use them. I am using the thread for reading over an indy connection.

The thread object is created during application start (FormCreate) and terminated when the connection is disconnected. The thread object is not freed on termination (my choice FreeOnTerminate := False) so I guess the reference to the thread object is still valid. I would like to have just one thread on the client and I am avoiding creating the thread on each connect. I have read that the overhead in managing multiple threads can impact performance. I have also noticed I cannot free the thread object when my application is closing down (FormClose) coz it hangs on calling Free even though the thread is terminated before freeing it.
0
Comment
Question by:martbase
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 17

Accepted Solution

by:
Wim ten Brink earned 400 total points
ID: 17905207
Nope. Once a thread is terminated, it's resources are gone too. All you have is the handle of the terminated process which could be used to get the final status of the thread and it's exitcode. But Windows has released all (well, most) of the resources it was using.

An application that hangs is often experiencing a deadlock, where two threads are waiting for each other to release a certain resource. Sometimes one of them will time-out but I've seen plenty of situation where the thread is waiting for an infinite amount of time for a resource to be released.
0
 
LVL 17

Assisted Solution

by:TheRealLoki
TheRealLoki earned 400 total points
ID: 17909101
if your program is hangingwhen you call suspend, then it probably means your thread is not checking "If terminated" or "suspended" often enough.
Hangs are avoidable as long as you are careful
can you paste your thread's on execute loop here?
Once we find the issue, and iron it out, you can carry on with just suspend and resume
0
 
LVL 1

Expert Comment

by:Computer101
ID: 21133162
Forced accept.

Computer101
EE Admin
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
In response to a need for security and privacy, and to continue fostering an environment members can turn to for support, solutions, and education, Experts Exchange has created anonymous question capabilities. This new feature is available to our Pr…
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…
Suggested Courses

650 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