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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 019</TITLE>
-</HEAD>
-<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
-
-<CENTER><B><FONT SIZE=+2>ACE Tutorial 019</FONT></B></CENTER>
-
-<CENTER><B><FONT SIZE=+2>Sharing your Memories</FONT></B></CENTER>
-
-<P>
-<HR WIDTH="100%">
-The client app looks much like the server. We could have included the
-CREATE flag with no ill effects but note the use of close() instead of
-remove(). Picking the correct detachment method is rather important!
-<HR>
-<PRE>
-<font color=red>// $Id$</font>
-
-<font color=red>// Again, the common stuff</font>
-<font color=blue>#include</font> "<font color=green>shmem.h</font>"
-
-<font color=blue>#if defined</font>(<font color=purple>ACE_LACKS_SYSV_SHMEM</font>)
-int
-main (int, char *[])
-{
- ACE_ERROR_RETURN ((LM_ERROR,
- "<font color=green>System V Shared Memory not available on this platform\n</font>"),
- 100);
-}
-#else <font color=red>// ACE_LACKS_SYSV_SHMEM</font>
-int
-main (int, char *[])
-{
- <font color=red>/*
- Attach ourselves to the shared memory segment.
- */</font>
- ACE_Shared_Memory_SV shm_client (SHM_KEY, SHMSZ);
-
- <font color=red>/*
- Get our reference to the segment...
- */</font>
- char *shm = (char *) shm_client.malloc ();
-
- <font color=red>/*
- If the segment identified by SHM_KEY didn't exist then we'll
- get back a 0 from malloc(). You should do this check even
- if you include the CREATE flag 'cause you never know when it
- might fail.
- */</font>
- if (shm == 0)
- ACE_ERROR_RETURN ((LM_ERROR,
- "<font color=green>(%P|%t) Could not get the segment!\n</font>"),
- 100);
-
- <font color=red>/*
- Does this match what your server said?
- */</font>
- ACE_DEBUG ((LM_INFO,
- "<font color=green>(%P|%t) Shared Memory is at 0x%x\n</font>",
- shm ));
-
- <font color=red>/*
- Show the shared data to the user and convert it all to
- uppper-case along the way.
- */</font>
- for (char *s = shm; *s != '\0'; s++)
- {
- putchar (*s);
- *s = toupper(*s);
- }
-
- putchar ('\n');
-
- <font color=red>/*
- Flag the server that we're done.
- */</font>
- *shm = '*';
-
- <font color=red>/*
- Here, we use close() instead of remove(). Remember, that
- will just remove our attachment to the segment. Look
- closely at the 'nattch' column of the ipcs output & you'll
- see that this decrements it by one.
- */</font>
- shm_client.close();
-
- return 0;
-}
-
-<font color=blue>#endif</font> <font color=red>/* ACE_LACKS_SYSV_SHMEM */</font>
-</PRE>
-<P><HR WIDTH="100%">
-<CENTER>[<A HREF="../online-tutorials.html">Tutorial Index</A>] [<A HREF="page04.html">Continue This Tutorial</A>]</CENTER>