<!-- page03.html,v 1.10 2000/03/19 20:09:25 jcej Exp --> <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>// page03.html,v 1.10 2000/03/19 20:09:25 jcej Exp</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>