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<hr><h1>messshm.h</h1><div class="fragment"><pre>00001 <font class="comment">//</font>
00002 <font class="comment">// messshm.h</font>
00003 <font class="comment">//</font>
00004 <font class="comment">// Copyright (C) 1996 Limit Point Systems, Inc.</font>
00005 <font class="comment">//</font>
00006 <font class="comment">// Author: Curtis Janssen &lt;cljanss@limitpt.com&gt;</font>
00007 <font class="comment">// Maintainer: LPS</font>
00008 <font class="comment">//</font>
00009 <font class="comment">// This file is part of the SC Toolkit.</font>
00010 <font class="comment">//</font>
00011 <font class="comment">// The SC Toolkit is free software; you can redistribute it and/or modify</font>
00012 <font class="comment">// it under the terms of the GNU Library General Public License as published by</font>
00013 <font class="comment">// the Free Software Foundation; either version 2, or (at your option)</font>
00014 <font class="comment">// any later version.</font>
00015 <font class="comment">//</font>
00016 <font class="comment">// The SC Toolkit is distributed in the hope that it will be useful,</font>
00017 <font class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00018 <font class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</font>
00019 <font class="comment">// GNU Library General Public License for more details.</font>
00020 <font class="comment">//</font>
00021 <font class="comment">// You should have received a copy of the GNU Library General Public License</font>
00022 <font class="comment">// along with the SC Toolkit; see the file COPYING.LIB.  If not, write to</font>
00023 <font class="comment">// the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.</font>
00024 <font class="comment">//</font>
00025 <font class="comment">// The U.S. Government is granted a limited license as per AL 91-7.</font>
00026 <font class="comment">//</font>
00027 
00028 <font class="preprocessor">#ifndef _util_group_messshm_h</font>
00029 <font class="preprocessor"></font><font class="preprocessor">#define _util_group_messshm_h</font>
00030 <font class="preprocessor"></font>
00031 <font class="preprocessor">#include &lt;unistd.h&gt;</font>
00032 <font class="preprocessor">#include &lt;sys/types.h&gt;</font>
00033 <font class="preprocessor">#include &lt;sys/ipc.h&gt;</font>
00034 <font class="preprocessor">#include &lt;sys/sem.h&gt;</font>
00035 <font class="preprocessor">#include &lt;sys/shm.h&gt;</font>
00036 
00037 <font class="preprocessor">#include &lt;util/group/message.h&gt;</font>
00038 
00039 <font class="keyword">namespace </font>sc {
00040 
00041 <font class="preprocessor">#define SHMCOMMBUFSIZE 1500000</font>
00042 <font class="preprocessor"></font>
00043 <font class="comment">/* Set the maximum number of processors (including the host). */</font>
00044 <font class="preprocessor">#define MAXPROCS 17</font>
00045 <font class="preprocessor"></font>
00046 
00047 <font class="keyword">struct </font>commbuf_struct {
00048     <font class="keywordtype">int</font> nmsg;
00049     <font class="keywordtype">int</font> n_wait_for_change;
00050     <font class="keywordtype">int</font> n_sync;
00051     <font class="keywordtype">char</font> buf[SHMCOMMBUFSIZE];
00052 };
00053 <font class="keyword">typedef</font> <font class="keyword">struct </font>commbuf_struct commbuf_t;
00054 
00055 <font class="keyword">struct </font>msgbuf_struct {
00056     <font class="keywordtype">int</font> type;
00057     <font class="keywordtype">int</font> from;
00058     <font class="keywordtype">int</font> size;
00059 };
00060 <font class="keyword">typedef</font> <font class="keyword">struct </font>msgbuf_struct msgbuf_t;
00061 
<a name="l00068"></a><a class="code" href="class_sc__ShmMessageGrp.html">00068</a> <font class="keyword">class </font>ShmMessageGrp: <font class="keyword">public</font> intMessageGrp {
00069   <font class="keyword">protected</font>:
00070     <font class="keywordtype">void</font> <a class="code" href="class_sc__ShmMessageGrp.html#b0">basic_send</a>(<font class="keywordtype">int</font> target, <font class="keywordtype">int</font> type, <font class="keywordtype">void</font>* data, <font class="keywordtype">int</font> nbyte);
00071     <font class="keywordtype">void</font> <a class="code" href="class_sc__ShmMessageGrp.html#b1">basic_recv</a>(<font class="keywordtype">int</font> type, <font class="keywordtype">void</font>* data, <font class="keywordtype">int</font> nbyte);
00072     <font class="keywordtype">int</font> <a class="code" href="class_sc__ShmMessageGrp.html#b2">basic_probe</a>(<font class="keywordtype">int</font> type);
00073     <font class="keywordtype">void</font> <a class="code" href="class_sc__MessageGrp.html#b0">initialize</a>(<font class="keywordtype">int</font> nprocs);
00074     <font class="keywordtype">void</font> <a class="code" href="class_sc__MessageGrp.html#b0">initialize</a>();
00075 
00076     <font class="comment">// previously static variables</font>
00077     commbuf_t *commbuf[MAXPROCS];
00078     <font class="keywordtype">int</font> shmid;
00079     <font class="keywordtype">int</font> semid;
00080     <font class="keywordtype">int</font> change_semid;
00081     <font class="keywordtype">void</font>* sharedmem;
00082     <font class="keyword">struct </font>sembuf semdec;
00083     <font class="keyword">struct </font>sembuf seminc;
00084 
00085     <font class="comment">// previously static functions for semephore operations</font>
00086     msgbuf_t *NEXT_MESSAGE(msgbuf_t *m);
00087     <font class="keywordtype">void</font> get_change(<font class="keywordtype">int</font> node);
00088     <font class="keywordtype">void</font> put_change(<font class="keywordtype">int</font> node);
00089     <font class="keywordtype">void</font> wait_for_write(<font class="keywordtype">int</font> node);
00090     <font class="keywordtype">void</font> release_write(<font class="keywordtype">int</font> node);
00091 <font class="preprocessor">#ifdef DEBUG</font>
00092 <font class="preprocessor"></font>    <font class="keywordtype">void</font> print_buffer(<font class="keywordtype">int</font> node, <font class="keywordtype">int</font> me);
00093 <font class="preprocessor">#endif</font>
00094 <font class="preprocessor"></font>  <font class="keyword">public</font>:
00096     <a class="code" href="class_sc__ShmMessageGrp.html#a0">ShmMessageGrp</a>();
00106     <a class="code" href="class_sc__ShmMessageGrp.html#a0">ShmMessageGrp</a>(<font class="keyword">const</font> Ref&lt;KeyVal&gt;&amp;);
00108     <a class="code" href="class_sc__ShmMessageGrp.html#a0">ShmMessageGrp</a>(<font class="keywordtype">int</font> nprocs);
00109     ~ShmMessageGrp();
00110     <font class="keywordtype">void</font> <a class="code" href="class_sc__ShmMessageGrp.html#a4">sync</a>();
00111 
00112     Ref&lt;MessageGrp&gt; <a class="code" href="class_sc__ShmMessageGrp.html#a5">clone</a>(<font class="keywordtype">void</font>);
00113 };
00114 
00115 }
00116      
00117 <font class="preprocessor">#endif</font>
00118 <font class="preprocessor"></font>
00119 <font class="comment">// Local Variables:</font>
00120 <font class="comment">// mode: c++</font>
00121 <font class="comment">// c-file-style: "CLJ"</font>
00122 <font class="comment">// End:</font>
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