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<hr><h1>sc::ShmMessageGrp Class Reference</h1>The <a class="el" href="class_sc__ShmMessageGrp.html">ShmMessageGrp</a> class is an implementation of <a class="el" href="class_sc__MessageGrp.html">MessageGrp</a> that allows multiple process to be started that communicate with shared memory.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="messshm_h-source.html">messshm.h</a>></code>
<p>
Inheritance diagram for sc::ShmMessageGrp<p><center><img src="class_sc__ShmMessageGrp_inherit_graph.gif" border="0" usemap="#sc::ShmMessageGrp_inherit_map" alt="Inheritance graph"></center>
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<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center>Collaboration diagram for sc::ShmMessageGrp:<p><center><img src="class_sc__ShmMessageGrp_coll_graph.gif" border="0" usemap="#sc::ShmMessageGrp_coll_map" alt="Collaboration graph"></center>
<map name="sc::ShmMessageGrp_coll_map">
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<area href="class_sc__RefCount.html" shape="rect" coords="18,97,101,115">
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<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="class_sc__ShmMessageGrp-members.html">List of all members.</a><table border=0 cellpadding=0 cellspacing=0>
<tr><td colspan=2><br><h2>Public Methods</h2></td></tr>
<tr><td nowrap align=right valign=top><a name="a0" doxytag="sc::ShmMessageGrp::ShmMessageGrp"></a>
</td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#a0">ShmMessageGrp</a> ()</td></tr>
<tr><td> </td><td><font size=-1><em>Reads the number of processors from environmental variable NUMPROC.</em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top> </td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#a1">ShmMessageGrp</a> (const <a class="el" href="class_sc__Ref.html">Ref</a>< <a class="el" href="class_sc__KeyVal.html">KeyVal</a> > &)</td></tr>
<tr><td> </td><td><font size=-1><em>The <a class="el" href="class_sc__ShmMessageGrp.html">ShmMessageGrp</a> <a class="el" href="class_sc__KeyVal.html">KeyVal</a> constructor takes a single keyword that specifies the number of processors.</em> <a href="#a1">More...</a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a name="a2" doxytag="sc::ShmMessageGrp::ShmMessageGrp"></a>
</td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#a2">ShmMessageGrp</a> (int nprocs)</td></tr>
<tr><td> </td><td><font size=-1><em>Initialize <a class="el" href="class_sc__ShmMessageGrp.html">ShmMessageGrp</a> to use nprocs processors.</em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a name="a3" doxytag="sc::ShmMessageGrp::~ShmMessageGrp"></a>
</td><td valign=bottom><b>~ShmMessageGrp</b> ()</td></tr>
<tr><td nowrap align=right valign=top><a name="a4" doxytag="sc::ShmMessageGrp::sync"></a>
void </td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#a4">sync</a> ()</td></tr>
<tr><td> </td><td><font size=-1><em>Synchronize all of the processors.</em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a name="a5" doxytag="sc::ShmMessageGrp::clone"></a>
<a class="el" href="class_sc__Ref.html">Ref</a><<a class="el" href="class_sc__MessageGrp.html">MessageGrp</a>> </td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#a5">clone</a> (void)</td></tr>
<tr><td> </td><td><font size=-1><em>Returns a copy of this <a class="el" href="class_sc__MessageGrp.html">MessageGrp</a> specialization that provides an independent communication context.</em></font><br><br></td></tr>
<tr><td colspan=2><br><h2>Protected Methods</h2></td></tr>
<tr><td nowrap align=right valign=top><a name="b0" doxytag="sc::ShmMessageGrp::basic_send"></a>
void </td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#b0">basic_send</a> (int target, int type, void *data, int nbyte)</td></tr>
<tr><td> </td><td><font size=-1><em>Must be implemented by specializations.</em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a name="b1" doxytag="sc::ShmMessageGrp::basic_recv"></a>
void </td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#b1">basic_recv</a> (int type, void *data, int nbyte)</td></tr>
<tr><td> </td><td><font size=-1><em>Must be implemented by specializations.</em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a name="b2" doxytag="sc::ShmMessageGrp::basic_probe"></a>
int </td><td valign=bottom><a class="el" href="class_sc__ShmMessageGrp.html#b2">basic_probe</a> (int type)</td></tr>
<tr><td> </td><td><font size=-1><em>Must be implemented by specializations.</em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a name="b3" doxytag="sc::ShmMessageGrp::initialize"></a>
void </td><td valign=bottom><b>initialize</b> (int nprocs)</td></tr>
<tr><td nowrap align=right valign=top><a name="b4" doxytag="sc::ShmMessageGrp::initialize"></a>
void </td><td valign=bottom><b>initialize</b> ()</td></tr>
<tr><td nowrap align=right valign=top><a name="b5" doxytag="sc::ShmMessageGrp::NEXT_MESSAGE"></a>
msgbuf_t* </td><td valign=bottom><b>NEXT_MESSAGE</b> (msgbuf_t *m)</td></tr>
<tr><td nowrap align=right valign=top><a name="b6" doxytag="sc::ShmMessageGrp::get_change"></a>
void </td><td valign=bottom><b>get_change</b> (int node)</td></tr>
<tr><td nowrap align=right valign=top><a name="b7" doxytag="sc::ShmMessageGrp::put_change"></a>
void </td><td valign=bottom><b>put_change</b> (int node)</td></tr>
<tr><td nowrap align=right valign=top><a name="b8" doxytag="sc::ShmMessageGrp::wait_for_write"></a>
void </td><td valign=bottom><b>wait_for_write</b> (int node)</td></tr>
<tr><td nowrap align=right valign=top><a name="b9" doxytag="sc::ShmMessageGrp::release_write"></a>
void </td><td valign=bottom><b>release_write</b> (int node)</td></tr>
<tr><td nowrap align=right valign=top><a name="b10" doxytag="sc::ShmMessageGrp::print_buffer"></a>
void </td><td valign=bottom><b>print_buffer</b> (int node, int me)</td></tr>
<tr><td colspan=2><br><h2>Protected Attributes</h2></td></tr>
<tr><td nowrap align=right valign=top><a name="n0" doxytag="sc::ShmMessageGrp::commbuf"></a>
commbuf_t* </td><td valign=bottom><b>commbuf</b> [MAXPROCS]</td></tr>
<tr><td nowrap align=right valign=top><a name="n1" doxytag="sc::ShmMessageGrp::shmid"></a>
int </td><td valign=bottom><b>shmid</b></td></tr>
<tr><td nowrap align=right valign=top><a name="n2" doxytag="sc::ShmMessageGrp::semid"></a>
int </td><td valign=bottom><b>semid</b></td></tr>
<tr><td nowrap align=right valign=top><a name="n3" doxytag="sc::ShmMessageGrp::change_semid"></a>
int </td><td valign=bottom><b>change_semid</b></td></tr>
<tr><td nowrap align=right valign=top><a name="n4" doxytag="sc::ShmMessageGrp::sharedmem"></a>
void* </td><td valign=bottom><b>sharedmem</b></td></tr>
<tr><td nowrap align=right valign=top><a name="n5" doxytag="sc::ShmMessageGrp::semdec"></a>
struct sembuf </td><td valign=bottom><b>semdec</b></td></tr>
<tr><td nowrap align=right valign=top><a name="n6" doxytag="sc::ShmMessageGrp::seminc"></a>
struct sembuf </td><td valign=bottom><b>seminc</b></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
The <a class="el" href="class_sc__ShmMessageGrp.html">ShmMessageGrp</a> class is an implementation of <a class="el" href="class_sc__MessageGrp.html">MessageGrp</a> that allows multiple process to be started that communicate with shared memory.
<p>
This only provides improved performance if you have multiple CPU's in a symmetric multiprocessor configuration. Nonetheless, it is quite useful on a single CPU for tracking down bugs.
<p>
<hr><h2>Constructor & Destructor Documentation</h2>
<a name="a1" doxytag="sc::ShmMessageGrp::ShmMessageGrp"></a><p>
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sc::ShmMessageGrp::ShmMessageGrp (
</b></td>
<td valign="bottom"><b>
const <a class="el" href="class_sc__Ref.html">Ref</a>< <a class="el" href="class_sc__KeyVal.html">KeyVal</a> > & )
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<p>
The <a class="el" href="class_sc__ShmMessageGrp.html">ShmMessageGrp</a> <a class="el" href="class_sc__KeyVal.html">KeyVal</a> constructor takes a single keyword that specifies the number of processors.
<p>
Here is an example of a <a class="el" href="class_sc__ParsedKeyVal.html">ParsedKeyVal</a> input that creates a <a class="el" href="class_sc__ShmMessageGrp.html">ShmMessageGrp</a> that runs on four processors:
<p>
<pre>
message<<a class="el" href="class_sc__ShmMessageGrp.html">ShmMessageGrp</a>>: n = 4
</pre> </td>
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</table>
<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="messshm_h-source.html">messshm.h</a></ul>
<hr>
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