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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 020</TITLE>
</HEAD>
<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
<CENTER><B><FONT SIZE=+2>ACE Tutorial 020</FONT></B></CENTER>
<CENTER><B><FONT SIZE=+2>Sharing your Memories with persistence</FONT></B></CENTER>
<P>
<HR WIDTH="100%">
The mmap.h where we define stuff that needs to be shared between the
apps at compile-time.
<hr>
<HR width=50%><P><center>mmap.h</center><HR width=50%>
<PRE>
<font color=red>// $Id$</font>
<font color=blue>#ifndef</font> <font color=purple>MMAP_H</font>
<font color=blue>#define</font> <font color=purple>MMAP_H</font>
<font color=red>// The expected filename for ACE_Shared_Memory_MM.h</font>
<font color=blue>#include</font> "<A HREF="../../../ace/Shared_Memory_MM.h">ace/Shared_Memory_MM.h</A>"
<font color=red>// Just enough for the alphabet...</font>
<font color=blue>#define</font> <font color=purple>SHMSZ</font> 27
<font color=red>/*
Here we use a real filename instead of an arbitrary number. This
actually will exist in the filesystem. You can 'cat' it and
everything!
*/</font>
<font color=blue>#define</font> <font color=purple>SHM_KEY</font> "<font color=green>mmapfile</font>"
<font color=red>/*
The SV Shared Memory SharedData object returns. It is identical to
the one we used in that tutorial. I didn't even change the name.
*/</font>
class SharedData
{
public:
SharedData (int initialize = 1);
void set (void);
void show (void);
int available (void);
void available (int not_in_use);
protected:
char buf_[128];
int available_;
};
<font color=blue>#endif</font> <font color=red>/* MMAP_H */</font>
</PRE>
<HR width=50%><P><center>mmap.cpp</center><HR width=50%>
<PRE>
<font color=red>// $Id$</font>
<font color=blue>#include</font> "<font color=green>mmap.h</font>"
<font color=#008888>SharedData::SharedData</font>(int _initialize)
: available_(0)
{
if( _initialize )
{
<font color=#008888>ACE_OS::sprintf</font>(buf_,"<font color=green>UNSET\n</font>");
}
}
void <font color=#008888>SharedData::set</font>(void)
{
<font color=#008888>ACE_OS::sprintf</font>(buf_,"<font color=green>My PID is (%d)\n</font>",ACE_OS::getpid());
}
void <font color=#008888>SharedData::show</font>(void)
{
ACE_DEBUG ((LM_INFO, "<font color=green>(%P|%t) Shared Data text is (%s)\n</font>",
buf_ ));
}
int <font color=#008888>SharedData::available</font>(void)
{
return available_;
}
void <font color=#008888>SharedData::available</font>(int _available)
{
available_ = _available;
}
</PRE>
<P><HR WIDTH="100%">
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