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diff --git a/docs/tutorials/011/page03.html b/docs/tutorials/011/page03.html deleted file mode 100644 index 4bbb5d3b62e..00000000000 --- a/docs/tutorials/011/page03.html +++ /dev/null @@ -1,191 +0,0 @@ -<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%"> - -Our Task object <A HREF="task.h">declaration</a> and <A HREF="task.cpp">definition</a>. - As with message_queue.cpp, -I've only commented the changes. -<P> - -<HR WIDTH="100%"> -<HR width=50%><P><center>task.h</center><HR width=50%> -<PRE> -<font color=red>// $Id$</font> - -<font color=blue>#ifndef</font> <font color=purple>TASK_H</font> -<font color=blue>#define</font> <font color=purple>TASK_H</font> - -<font color=blue>#include</font> "<font color=green>ace/Task.h</font>" - -<font color=blue>#if !defined</font> (<font color=purple>ACE_LACKS_PRAGMA_ONCE</font>) -# pragma once -<font color=blue>#endif</font> <font color=red>/* ACE_LACKS_PRAGMA_ONCE */</font> - -class Task : public ACE_Task <ACE_MT_SYNCH> -{ -public: - - typedef ACE_Task <ACE_MT_SYNCH> inherited; - - Task (size_t n_threads); - ~Task (void); - - int open (void * = 0); - - int svc (void); - - int close (u_long flags = 0); - -protected: - ACE_Barrier *barrier_; - - size_t n_threads_; -}; - -<font color=blue>#endif</font> <font color=red>/* TASK_H */</font> -</PRE> -<HR width=50%><P><center>task.cpp</center><HR width=50%> -<PRE> -<font color=red>// $Id$</font> - -<font color=blue>#include</font> "<font color=green>task.h</font>" -<font color=blue>#include</font> "<font color=green>block.h</font>" -<font color=blue>#include</font> "<font color=green>data.h</font>" - -<font color=#008888>Task::Task</font> (size_t n_threads) - : barrier_ (0), - n_threads_ (n_threads) -{ - ACE_DEBUG ((LM_DEBUG, - "<font color=green>(%P|%t) Task ctor 0x%x\n</font>", - (void *) this)); -} - -<font color=#008888>Task::~Task</font> (void) -{ - ACE_DEBUG ((LM_DEBUG, - "<font color=green>(%P|%t) Task dtor 0x%x\n</font>", - (void *) this)); - - ACE_Message_Block *message; - this->getq (message); - message->release (); - - delete barrier_; -} - -int -<font color=#008888>Task::open</font> (void *) -{ - barrier_; - - ACE_NEW_RETURN (barrier_, - ACE_Barrier (this->n_threads_), - -1); - - return this->activate (THR_NEW_LWP, - threads); -} - -int -<font color=#008888>Task::close</font> (u_long flags) -{ - ACE_DEBUG ((LM_DEBUG, - "<font color=green>(%P|%t) Task close 0x%x\n</font>", - (void *) this)); - return <font color=#008888>inherited::close</font> (flags); -} - -int -<font color=#008888>Task::svc</font> (void) -{ - this->barrier_->wait (); - - ACE_DEBUG ((LM_DEBUG, - "<font color=green>(%P|%t) Task 0x%x starts in thread %d\n</font>", - (void *) this, - <font color=#008888>ACE_Thread::self</font> ())); - - ACE_Message_Block *message; - - for (;;) - { - if (this->getq (message) == -1) - ACE_ERROR_RETURN ((LM_ERROR, - "<font color=green>%p\n</font>", - "<font color=green>getq</font>"), - -1); - - if (message->msg_type () == <font color=#008888>ACE_Message_Block::MB_HANGUP</font>) - { - this->putq (message); - - break; - } - - const char *cp = message->rd_ptr (); - <font color=red>// Don't forget to skip the NULL we inserted</font> - message->rd_ptr (<font color=#008888>ACE_OS::strlen</font> (cp) + 1); - - ACE_DEBUG ((LM_DEBUG, - "<font color=green>(%P|%t) Block 0x%x contains (%s)\n</font>", - (void *) message, - cp)); - - <font color=red>/* Create a Data object into which we can extract the message - block contents. */</font> - Data data; - - <font color=red>/* Use the rd_ptr() to access the message block data. Note that - we've already moved it past the text string in the block. */</font> - <font color=#008888>ACE_OS::memmove</font> ((char *) &data, - message->rd_ptr (), - sizeof (data)); - message->rd_ptr (sizeof (data)); <font color=red>// Move the rd_ptr() beyond the data.</font> - - <font color=red>/* Invoke a couple of method calls on the object we constructed. */</font> - data.who_am_i (); - data.what_am_i (); - - <font color=red>/* An alternate approach: - - Data * data; - data = (Data *)message->rd_ptr(); - data->who_am_i(); - data->what_am_i(); - message->rd_ptr(sizeof(Data)); - - Even though this cuts down on the number of copies & - constructions, I'm not real fond of it. You can get into - trouble in a hurry by treating memory blocks as multiple data - types... */</font> - - - <font color=#008888>ACE_OS::sleep</font> (ACE_Time_Value (0, 5000)); - - message->release (); - } - - return 0; -} -</PRE> -<HR WIDTH="100%"> -<P> -Notice how we had to create a temporary Data object to copy the stuff out -of the message block? Again, if there were non-trivial ctor/dtors involved -then this wouldn't work at all. -<P> -<P><HR WIDTH="100%"> -<CENTER>[<A HREF="../online-tutorials.html">Tutorial Index</A>] [<A HREF="page04.html">Continue This Tutorial</A>]</CENTER> |