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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 011</TITLE>
</HEAD>
<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
<CENTER><B><FONT SIZE=+2>ACE Tutorial 011</FONT></B></CENTER>
<CENTER><B><FONT SIZE=+2>Passing non-trivial data through an ACE_Message_Queue</FONT></B></CENTER>
<P>
<HR WIDTH="100%">
Before we go further, let's look at this <A HREF="data.h">Data</A> object
that's causing all the fuss.
<P>
<HR WIDTH="100%">
<PRE>
<font color=red>// $Id$</font>
<font color=blue>#ifndef</font> <font color=purple>DATA_H</font>
<font color=blue>#define</font> <font color=purple>DATA_H</font>
class DataBase
{
public:
DataBase (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) DataBase ctor 0x%x\n</font>",
(void *) this));
}
virtual ~DataBase (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) DataBase dtor 0x%x\n</font>",
(void *) this));
}
void who_am_i (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) DataBase instance 0x%x\n</font>",
(void *) this));
}
virtual void what_am_i (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) I am a DataBase object\n</font>"));
}
};
class Data : public DataBase
{
public:
Data (void)
: message_ (-1)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) Data ctor 0x%x\n</font>",
(void *) this));
}
Data (int message)
: message_ (message)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) Data ctor 0x%x for message %d\n</font>",
(void *) this, message_));
}
virtual ~Data (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) Data dtor 0x%x\n</font>",
(void *) this));
}
void what_am_i (void)
{
ACE_DEBUG ((LM_DEBUG,
"<font color=green>(%P|%t) I am a Data object for message %d\n</font>",
message_));
}
protected:
int message_;
};
<font color=blue>#endif</font> <font color=red>/* DATA_H */</font>
</PRE>
<HR WIDTH="100%">
<P>
Ok, no mysterious magic on this one. Just a simple object and derivative
that report their existence.
<P>
<P><HR WIDTH="100%">
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