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-<!-- $Id$ -->
-<HTML>
-<HEAD>
- <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
- <META NAME="Author" CONTENT="James CE Johnson">
- <TITLE>ACE Tutorial 013</TITLE>
-</HEAD>
-<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
-
-<CENTER><B><FONT SIZE=+2>ACE Tutorial 013</FONT></B></CENTER>
-
-<CENTER><B><FONT SIZE=+2>Multiple thread pools</FONT></B></CENTER>
-
-
-<P>
-<HR WIDTH="100%">
-<P>
-On this page we have the code for the Data_Block and Message_Block
-objects. As you probably suspect from the header on the previous
-page, the complicated part is in the construction and destruction of
-the Data_Block.
-<P>
-<HR WIDTH="100%">
-<PRE>
-
-<font color=red>// $Id$</font>
-
-<font color=blue>#include</font> "<font color=green>block.h</font>"
-
-<font color=red>/*
- Construct a Dat_Block to contain a unit of work. Note the careful
- construction of the baseclass to set the block type and the locking
- strategy.
- */</font>
-<font color=#008888>Data_Block::Data_Block</font> (Unit_Of_Work * _data)
- : ACE_Data_Block (0, <font color=#008888>ACE_Message_Block::MB_DATA</font>, 0, 0, new Lock (), 0, 0)
- ,data_ (_data)
-{
- ACE_DEBUG ((LM_DEBUG, "<font color=green>(%P|%t) 0x%x Data_Block ctor for 0x%x\n</font>", (void *) this, (void *) data_));
-}
-
-<font color=red>/*
- The Lock object created in the constructor is stored in the baseclass and
- available through the locking_strategy() method. We can cast it's value to
- our Lock object and invoke the destroy() to indicate that we want it to go
- away when the lock is released.
- */</font>
-<font color=#008888>Data_Block::~Data_Block</font> (void)
-{
- ACE_DEBUG ((LM_DEBUG, "<font color=green>(%P|%t) 0x%x Data_Block dtor for 0x%x\n</font>", (void *) this, (void *) data_));
- ((Lock *) locking_strategy ())->destroy ();
- delete data_;
-}
-
-<font color=red>/*
- Return the data
- */</font>
-Unit_Of_Work *<font color=#008888>Data_Block::data</font> (void)
-{
- return this->data_;
-}
-
-Data_Block:: <font color=#008888>Lock::Lock</font> (void)
-{
- ACE_DEBUG ((LM_DEBUG, "<font color=green>(%P|%t) 0x%x Lock ctor\n</font>", (void *) this));
-}
-
-Data_Block:: <font color=#008888>Lock::~Lock</font> (void)
-{
- ACE_DEBUG ((LM_DEBUG, "<font color=green>(%P|%t) 0x%x Lock dtor\n</font>", (void *) this));
-}
-
-<font color=red>/*
- Delete ourselves to prevent any memory leak
- */</font>
-int <font color=#008888>Data_Block::Lock</font>::destroy (void)
-{
- delete this;
- return (0);
-}
-
-<font color=red>/*
- Create an baseclass unit of work when we instantiate a hangup message.
- */</font>
-<font color=#008888>Message_Block::Message_Block</font> (void)
- :ACE_Message_Block (new Data_Block (new Unit_Of_Work ()))
-{
- ACE_DEBUG ((LM_DEBUG, "<font color=green>(%P|%t) 0x%x Message_Block ctor for shutdown\n</font>", (void *) this));
- this->msg_type (MB_HANGUP);
-}
-
-<font color=red>/*
- Store the unit of work in a Data_Block and initialize the baseclass with
- that data.
- */</font>
-<font color=#008888>Message_Block::Message_Block</font> (Unit_Of_Work * _data)
- :ACE_Message_Block (new Data_Block (_data))
-{
- ACE_DEBUG ((LM_DEBUG, "<font color=green>(%P|%t) 0x%x Message_Block ctor for 0x%x\n</font>", (void *) this, (void *) _data));
-}
-
-<font color=#008888>Message_Block::~Message_Block</font> (void)
-{
- ACE_DEBUG ((LM_DEBUG, "<font color=green>(%P|%t) 0x%x Message_Block dtor\n</font>", (void *) this));
-}
-</PRE>
-<P><HR WIDTH="100%">
-<CENTER>[<A HREF="../online-tutorials.html">Tutorial Index</A>] [<A HREF="page06.html">Continue This Tutorial</A>]</CENTER>
-