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<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Author" CONTENT="James CE Johnson">
<TITLE>ACE Tutorial 010</TITLE>
</HEAD>
<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
<CENTER><B><FONT SIZE=+2>ACE Tutorial 010</FONT></B></CENTER>
<CENTER><B><FONT SIZE=+2>Passing chunks of data through an ACE_Message_Queue</FONT></B></CENTER>
<P>
<HR WIDTH="100%">
Our <A HREF="block.h">Block</A> object is a very simple derivative
of the ACE_Message_Block. The only reason I created it was to prove
that the message blocks to, indeed, get freed when we're done with 'em.
<P>
<HR WIDTH="100%">
<PRE>
<font color=red>// $Id$</font>
<font color=blue>#ifndef</font> <font color=purple>BLOCK_H</font>
<font color=blue>#define</font> <font color=purple>BLOCK_H</font>
<font color=blue>#include</font> "<A HREF="../../../ace/Message_Block.h">ace/Message_Block.h</A>"
<font color=blue>#if !defined</font> (<font color=purple>ACE_LACKS_PRAGMA_ONCE</font>)
<font color=blue># pragma</font> <font color=purple>once</font>
<font color=blue>#endif</font> <font color=red>/* ACE_LACKS_PRAGMA_ONCE */</font>
<font color=red>/* This simple ACE_Message_Block derivative will inform us of it's
construction and destruction. We'll use this to assure ourselves
that we don't have any memory leaks. In a real application, of
course, this isn't necessary. */</font>
class Block : public ACE_Message_Block
{
public:
Block (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) Block ctor 0x%x\n</font>",
(void *) this));
}
Block (size_t size)
: ACE_Message_Block (size)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) Block ctor 0x%x\n</font>",
(void *) this));
}
virtual ~Block (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) Block dtor 0x%x\n</font>",
(void *) this));
}
};
<font color=blue>#endif</font> <font color=red>/* BLOCK_H */</font>
</PRE>
<HR WIDTH="100%">
<P>
Ok, nothing really magic there. Some folks just feel a little uncomfortable
not doing an explicit <i>delete</i> on objects they've <i>new</i>'d so I
wanted to show you that the memory really does get cleaned up.
<P><HR WIDTH="100%">
<CENTER>[<A HREF="../online-tutorials.html">Tutorial Index</A>] [<A HREF="page04.html">Continue This Tutorial</A>]</CENTER>
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