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Constructor and destructor with TThread

Posted on 2001-06-04
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Last Modified: 2012-06-27
Hi,

I am creating my own thread class, by deriving a class from TThread.  Now I need to be able to add my own constructor (with my own parameters, used to initialise some data before the thread starts) and destructor (to clean up after it) to the class.

How can I add my own code to do this, without effecting the TThread's own constructor and destructor?  I still need the thread to run correctly when my Create is called (and run it with CreateSuspended being False).

Thanks in Advance,

Richard2000
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Question by:Richard2000
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2 Comments
 
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Expert Comment

by:Baksa
ID: 6152676
Here is the Borland way, this is implementation of TThread descendant,  TServerAcceptThread.


TServerAcceptThread = class(TThread)
  private
    FServerSocket: TServerWinSocket;
  public
    constructor Create(CreateSuspended: Boolean; ASocket: TServerWinSocket);
    procedure Execute; override;

    property ServerSocket: TServerWinSocket read FServerSocket;
  end;



constructor TServerAcceptThread.Create(CreateSuspended: Boolean;
  ASocket: TServerWinSocket);
begin
  FServerSocket := ASocket;
  inherited Create(CreateSuspended);
end;

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Accepted Solution

by:
MarcG earned 200 total points
ID: 6155555
Baksa said already  ... you can write your own constructor and sestructor like you would if you write an new class, the only thing you now have to do is calling the constructor/destructor of your parent class.

with constructor like this
constructor MyClass.Create(MyData: MyType, MyOwner: TComponent)
begin
  DoMyCode;
  inherited create(MyOwner);
  //First do your things than call the constructor of parent
end;

and the other way with destructor
destructor MyDestroy;
begin
  inherited destroy;
  //First call parent destructor
  FreeMyData;
end;

You can do this with all classes not only TThreads
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