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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 015</TITLE>
-</HEAD>
-<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
-
-<CENTER><B><FONT SIZE=+2>ACE Tutorial 015</FONT></B></CENTER>
-
-<CENTER><B><FONT SIZE=+2>Building a protocol stream</FONT></B></CENTER>
-
-<P>
-<HR WIDTH="100%">
-A quick look at the Protocol_Task header...
-<HR>
-<PRE>
-<font color=red>// $Id$</font>
-
-<font color=blue>#ifndef</font> <font color=purple>PROTOCOL_TASK_H</font>
-<font color=blue>#define</font> <font color=purple>PROTOCOL_TASK_H</font>
-
-<font color=blue>#include</font> "<A HREF="../../../ace/Task.h">ace/Task.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>/* A typical ACE_Task&lt;> derivative that adds a few things appropriate
-   to protocol stacks.  To keep things a little simpler, we prevent
-   activation of the task and just borrow the thread of control from
-   the calling method in all cases.
-*/</font>
-class Protocol_Task : public ACE_Task&lt;ACE_MT_SYNCH>
-{
-public:
-  typedef ACE_Task&lt;ACE_MT_SYNCH> inherited;
-
-  Protocol_Task (void);
-
-  ~Protocol_Task (void);
-
-  <font color=red>// open() is invoked when the task is inserted into the stream.</font>
-  virtual int open (void *arg);
-
-  <font color=red>// close() is invoked when the stream is closed (flags will be set</font>
-  <font color=red>// to '1') and when the svc() method exits (flags will be '0').</font>
-  virtual int close (u_long flags);
-
-  <font color=red>// As data travels through the stream, the put() method of each task</font>
-  <font color=red>// is invoked to keep the data moving along.</font>
-  virtual int put (ACE_Message_Block *message,
-                   ACE_Time_Value *timeout);
-
-  <font color=red>// We're obligated to provide this signature even though we won't be </font>
-  <font color=red>// allowing this object to be activated.</font>
-  virtual int svc (void);
-
-protected:
-
-  <font color=red>// Called by put() or svc() as necessary to process a block of data.</font>
-  int process (ACE_Message_Block *message,
-               ACE_Time_Value *timeout);
-
-  <font color=red>// Tasks on the writer (downstream) side of the stream are called</font>
-  <font color=red>// upon to send() data that will ultimately go to the peer.</font>
-  virtual int send (ACE_Message_Block *message,
-                    ACE_Time_Value *timeout);
-
-  <font color=red>// Tasks on the reader (upstream) side will be receiving data that</font>
-  <font color=red>// came from the peer.</font>
-  virtual int recv (ACE_Message_Block *message,
-                    ACE_Time_Value *timeout);
-
-};
-
-<font color=blue>#endif</font> <font color=red>/* PROTOCOL_TASK_H */</font>
-</PRE>
-<P><HR WIDTH="100%">
-<CENTER>[<A HREF="../online-tutorials.html">Tutorial Index</A>] [<A HREF="page13.html">Continue This Tutorial</A>]</CENTER>