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<h1>contrib/openisis/lsv.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> openisis - an open implementation of the CDS/ISIS database</span>
<a name="l00003"></a>00003 <span class="comment"> Version 0.8.x (patchlevel see file Version)</span>
<a name="l00004"></a>00004 <span class="comment"> Copyright (C) 2001-2003 by Erik Grziwotz, erik@openisis.org</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00007"></a>00007 <span class="comment"> modify it under the terms of the GNU Lesser General Public</span>
<a name="l00008"></a>00008 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00009"></a>00009 <span class="comment"> version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00014"></a>00014 <span class="comment"> Lesser General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> You should have received a copy of the GNU Lesser General Public</span>
<a name="l00017"></a>00017 <span class="comment"> License along with this library; if not, write to the Free Software</span>
<a name="l00018"></a>00018 <span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment"> see README for more information</span>
<a name="l00021"></a>00021 <span class="comment">EOH */</span>
<a name="l00022"></a>00022 <span class="preprocessor">#ifndef LSV_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="comment">/*</span>
<a name="l00025"></a>00025 <span class="comment"> $Id: lsv.h,v 1.11 2003/06/03 17:09:20 kripke Exp $</span>
<a name="l00026"></a>00026 <span class="comment"> OpenIsis server</span>
<a name="l00027"></a>00027 <span class="comment">*/</span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="preprocessor">#ifdef _REENTRANT </span><span class="comment">/* it's really the wrong flag, but *sigh* */</span>
<a name="l00030"></a>00030 <span class="preprocessor">#define LSVTHR</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="preprocessor">#ifdef LSVTHR</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#include <pthread.h></span> <span class="comment">/* else the work is done by the receiver */</span>
<a name="l00035"></a>00035 <span class="preprocessor">#endif</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="preprocessor">#include "loi.h"</span>
<a name="l00039"></a>00039 <span class="preprocessor">#include "lio.h"</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include "lses.h"</span>
<a name="l00041"></a>00041
<a name="l00042"></a>00042
<a name="l00099"></a>00099 <span class="comment">/* common header tags -- actually negative tags are used */</span>
<a name="l00100"></a>00100 <span class="keyword">enum</span> {
<a name="l00101"></a>00101 <span class="comment">/* nonstandard */</span>
<a name="l00102"></a>00102 LSV_TEXT, <span class="comment">/* +- 0: a small, inlined untyped or text/plain body */</span>
<a name="l00103"></a>00103 LSV_RID, <span class="comment">/* row id, a.k.a MFN */</span>
<a name="l00104"></a>00104 LSV_SID, <span class="comment">/* session id */</span>
<a name="l00105"></a>00105 LSV_PEER, <span class="comment">/* network peer ("remote host") */</span>
<a name="l00106"></a>00106 LSV_TIME, <span class="comment">/* GTF + millis */</span>
<a name="l00107"></a>00107 LSV_ATTACH, <span class="comment">/* wrapped-up attachment, TBD */</span>
<a name="l00108"></a>00108 <span class="comment">/* MIME basics */</span>
<a name="l00109"></a>00109 LSV_CTYPE,
<a name="l00110"></a>00110 <span class="comment">/* HTTP: CGI/servlet */</span>
<a name="l00111"></a>00111 LSV_URI,
<a name="l00112"></a>00112 LSV_QUERY
<a name="l00113"></a>00113 };
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="keyword">enum</span> {
<a name="l00116"></a>00116 <span class="preprocessor">#ifdef LSVTHR</span>
<a name="l00117"></a>00117 <span class="preprocessor"></span> LSV_NUMWRK = 8,
<a name="l00118"></a>00118 <span class="preprocessor">#else</span>
<a name="l00119"></a>00119 <span class="preprocessor"></span> LSV_NUMWRK = 1,
<a name="l00120"></a>00120 <span class="preprocessor">#endif</span>
<a name="l00121"></a>00121 <span class="preprocessor"></span> LSV_BUFSIZ = 0x04000, <span class="comment">/* 16384 a.k.a. 16K */</span>
<a name="l00122"></a>00122 LSV_BUFMSK = 0x03fff <span class="comment">/* mask buf lengths */</span>
<a name="l00123"></a>00123 };
<a name="l00124"></a>00124
<a name="l00125"></a><a class="code" href="structQue.html">00125</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structQue.html">Que</a> {
<a name="l00126"></a>00126 <span class="keyword">struct </span><a class="code" href="structCon.html">Con</a> *head;
<a name="l00127"></a>00127 <span class="keyword">struct </span><a class="code" href="structCon.html">Con</a> *tail;
<a name="l00128"></a>00128 <span class="keywordtype">int</span> len;
<a name="l00129"></a>00129 } <a class="code" href="structQue.html">Que</a>;
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">/* queue with pool of workers waiting */</span>
<a name="l00132"></a><a class="code" href="structPool.html">00132</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structPool.html">Pool</a> {
<a name="l00133"></a>00133 <a class="code" href="structQue.html">Que</a> que;
<a name="l00134"></a>00134 <span class="preprocessor">#ifdef LSVTHR</span>
<a name="l00135"></a>00135 <span class="preprocessor"></span> <span class="keyword">struct </span><a class="code" href="structWrk.html">Wrk</a> *wait; <span class="comment">/* stack */</span>
<a name="l00136"></a>00136 <span class="preprocessor">#endif</span>
<a name="l00137"></a>00137 <span class="preprocessor"></span>} <a class="code" href="structPool.html">Pool</a>;
<a name="l00138"></a>00138
<a name="l00139"></a><a class="code" href="structWrk.html">00139</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structWrk.html">Wrk</a> {
<a name="l00140"></a>00140 <span class="preprocessor">#ifdef LSVTHR</span>
<a name="l00141"></a>00141 <span class="preprocessor"></span> pthread_t thr;
<a name="l00142"></a>00142 <span class="preprocessor">#endif</span>
<a name="l00143"></a>00143 <span class="preprocessor"></span> <span class="keywordtype">unsigned</span> id;
<a name="l00144"></a>00144 <span class="keyword">struct </span><a class="code" href="structSrv.html">Srv</a> *srv;
<a name="l00145"></a>00145 <span class="keyword">struct </span><a class="code" href="structWrk.html">Wrk</a> *nxt;
<a name="l00146"></a>00146 Session ses;
<a name="l00147"></a>00147 <span class="preprocessor">#ifdef LSVTHR</span>
<a name="l00148"></a>00148 <span class="preprocessor"></span> pthread_cond_t todo; <span class="comment">/* work condition waited for by workers */</span>
<a name="l00149"></a>00149 <span class="preprocessor">#endif</span>
<a name="l00150"></a>00150 <span class="preprocessor"></span> <span class="comment">/* stats */</span>
<a name="l00151"></a>00151 <span class="keyword">struct </span><a class="code" href="structCon.html">Con</a> *cur; <span class="comment">/* current job */</span>
<a name="l00152"></a>00152 <span class="keywordtype">int</span> jobs;
<a name="l00153"></a>00153 <span class="keywordtype">int</span> waits;
<a name="l00154"></a>00154 } <a class="code" href="structWrk.html">Wrk</a>;
<a name="l00155"></a>00155
<a name="l00156"></a>00156 <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structSrv.html">Srv</a> {
<a name="l00157"></a>00157 <span class="comment">/*</span>
<a name="l00158"></a>00158 <span class="comment"> the protocol stream method</span>
<a name="l00159"></a>00159 <span class="comment"> - with LIO_SPUSH, input is pushed to request (len 0 indicates EOF)</span>
<a name="l00160"></a>00160 <span class="comment"> return 0=more, >0=done, <0=error</span>
<a name="l00161"></a>00161 <span class="comment"> - on LIO_SFLUSH, prt must convert output buffer to flt</span>
<a name="l00162"></a>00162 <span class="comment"> - on LIO_SCLOSE, prt must flush and close answer</span>
<a name="l00163"></a>00163 <span class="comment"> */</span>
<a name="l00164"></a>00164 int (*prt) ( <a class="code" href="structIos.html">Ios</a>*, <span class="keywordtype">int</span> op );
<a name="l00165"></a>00165 <span class="comment">/*</span>
<a name="l00166"></a>00166 <span class="comment"> the application</span>
<a name="l00167"></a>00167 <span class="comment"> - with task APPARG (called by prt for each field):</span>
<a name="l00168"></a>00168 <span class="comment"> check (and typically modify) last field extracted by prt</span>
<a name="l00169"></a>00169 <span class="comment"> return 0=more, >0=done, <0=error</span>
<a name="l00170"></a>00170 <span class="comment"> - with task APPGOT (after request is complete):</span>
<a name="l00171"></a>00171 <span class="comment"> check request, add -LSV_SID field, if needed</span>
<a name="l00172"></a>00172 <span class="comment"> (e.g. to extract from an URL or cookie)</span>
<a name="l00173"></a>00173 <span class="comment"> - with task APPRUN (0):</span>
<a name="l00174"></a>00174 <span class="comment"> process request</span>
<a name="l00175"></a>00175 <span class="comment"> */</span>
<a name="l00176"></a>00176 int (*app) ( <span class="keyword">struct </span><a class="code" href="structCon.html">Con</a>*, <span class="keywordtype">int</span> task );
<a name="l00177"></a>00177 Fdt *fdt; <span class="comment">/* field def */</span>
<a name="l00178"></a>00178 <span class="keywordtype">int</span> flg; <span class="comment">/* flags */</span>
<a name="l00179"></a>00179 <span class="keywordtype">unsigned</span> sto; <span class="comment">/* config: session timeout (seconds) */</span>
<a name="l00180"></a>00180 <span class="keywordtype">unsigned</span> nwr; <span class="comment">/* config: #workers (<= LSV_NUMWRK) */</span>
<a name="l00181"></a>00181 Session ses; <span class="comment">/* usually the default session */</span>
<a name="l00182"></a>00182 <a class="code" href="structTm.html">Tm</a> tim; <span class="comment">/* tim of last turn */</span>
<a name="l00183"></a>00183 <span class="keywordtype">char</span> gtm[20]; <span class="comment">/* generalized time (actually 18 digits) */</span>
<a name="l00184"></a>00184 <a class="code" href="structWrk.html">Wrk</a> wrk[LSV_NUMWRK];
<a name="l00185"></a>00185 <span class="comment">/*</span>
<a name="l00186"></a>00186 <span class="comment"> single receiver model</span>
<a name="l00187"></a>00187 <span class="comment"> */</span>
<a name="l00188"></a>00188 <span class="keywordtype">int</span> lsn; <span class="comment">/* listening socket */</span>
<a name="l00189"></a>00189 <a class="code" href="structQue.html">Que</a> recv; <span class="comment">/* enq by worker, deq by receiver */</span>
<a name="l00190"></a>00190 <a class="code" href="structPool.html">Pool</a> main; <span class="comment">/* enq by dispatcher, deq by workers */</span>
<a name="l00191"></a>00191 <span class="preprocessor">#ifdef LSVTHR</span>
<a name="l00192"></a>00192 <span class="preprocessor"></span> <a class="code" href="structPool.html">Pool</a> pool; <span class="comment">/* enq by dispatcher, deq by workers */</span>
<a name="l00193"></a>00193 pthread_t rcv; <span class="comment">/* the receiver thread */</span>
<a name="l00194"></a>00194 pthread_mutex_t mut; <span class="comment">/* single mutex held by recv/disp while not in select */</span>
<a name="l00195"></a>00195 <span class="keywordtype">int</span> pip[2]; <span class="comment">/* pipe for pending events */</span>
<a name="l00196"></a>00196 <span class="preprocessor">#endif</span>
<a name="l00197"></a>00197 <span class="preprocessor"></span> <span class="comment">/* stats */</span>
<a name="l00198"></a>00198 <span class="keywordtype">int</span> plen; <span class="comment">/* length of pool */</span>
<a name="l00199"></a>00199 <span class="keywordtype">int</span> jobs; <span class="comment">/* total #jobs */</span>
<a name="l00200"></a>00200 <span class="keywordtype">int</span> conn; <span class="comment">/* total #conn */</span>
<a name="l00201"></a>00201 <span class="keywordtype">int</span> turn; <span class="comment">/* total #turn */</span>
<a name="l00202"></a>00202 <span class="keywordtype">float</span> wlen; <span class="comment">/* cumulated length of work queue (on each turn) */</span>
<a name="l00203"></a>00203 <span class="keywordtype">float</span> busy; <span class="comment">/* cumulated # of active workers (on each turn) */</span>
<a name="l00204"></a>00204 } <a class="code" href="structSrv.html">Srv</a>;
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="keyword">enum</span> { <span class="comment">/* server flags */</span>
<a name="l00207"></a>00207 LSV_CONSES = 0x01, <span class="comment">/* session bound to connection */</span>
<a name="l00208"></a>00208 LSV_WRKSES = 0x02, <span class="comment">/* session bound to worker */</span>
<a name="l00209"></a>00209 LSV_SHUTDN = 0x100 <span class="comment">/* server is shutting down */</span>
<a name="l00210"></a>00210 };
<a name="l00211"></a>00211 <span class="keyword">enum</span> {
<a name="l00212"></a>00212 <span class="comment">/* called in worker thread: */</span>
<a name="l00213"></a>00213 LSV_APPRUN, <span class="comment">/* app called to process request */</span>
<a name="l00214"></a>00214 LSV_APPINI, <span class="comment">/* app called to initialise non-main thread (no con) */</span>
<a name="l00215"></a>00215 LSV_APPFIN, <span class="comment">/* app called to finalize non-main thread (no con) */</span>
<a name="l00216"></a>00216 <span class="comment">/* called in receiver thread: */</span>
<a name="l00217"></a>00217 LSV_APPARG, <span class="comment">/* app called to check parameter */</span>
<a name="l00218"></a>00218 LSV_APPGOT, <span class="comment">/* app called after all input */</span>
<a name="l00219"></a>00219 LSV_APPSES <span class="comment">/* app called on new session */</span>
<a name="l00220"></a>00220 };
<a name="l00221"></a>00221 <span class="keyword">enum</span> { <span class="comment">/* connection pending state */</span>
<a name="l00222"></a>00222 LSV_PDGNON, <span class="comment">/* new connection pending */</span>
<a name="l00223"></a>00223 LSV_PDGNEW, <span class="comment">/* new connection pending */</span>
<a name="l00224"></a>00224 LSV_PDGRED, <span class="comment">/* ready to read pending */</span>
<a name="l00225"></a>00225 LSV_PDGEOF <span class="comment">/* EOF pending */</span>
<a name="l00226"></a>00226 <span class="comment">/* when adding, keep array of names in sync */</span>
<a name="l00227"></a>00227 };
<a name="l00228"></a>00228 <span class="keyword">enum</span> { <span class="comment">/* connection processing stage */</span>
<a name="l00229"></a>00229 LSV_STGNEW, <span class="comment">/* connection needs to be setup */</span>
<a name="l00230"></a>00230 LSV_STGCON, <span class="comment">/* connected, no request on the way */</span>
<a name="l00231"></a>00231 LSV_STGINP, <span class="comment">/* reading input */</span>
<a name="l00232"></a>00232 LSV_STGSES, <span class="comment">/* waiting for session */</span>
<a name="l00233"></a>00233 LSV_STGWRK, <span class="comment">/* queued for work */</span>
<a name="l00234"></a>00234 <span class="comment">/* set by worker: */</span>
<a name="l00235"></a>00235 LSV_STGRUN, <span class="comment">/* dequeued */</span>
<a name="l00236"></a>00236 LSV_STGCOM, <span class="comment">/* commited (output has started) */</span>
<a name="l00237"></a>00237 LSV_STGDON, <span class="comment">/* done processing, flushing output */</span>
<a name="l00238"></a>00238 LSV_STGRET <span class="comment">/* returning (queued to recv) */</span>
<a name="l00239"></a>00239 <span class="comment">/* when adding, keep array of names in sync */</span>
<a name="l00240"></a>00240 };
<a name="l00241"></a>00241
<a name="l00242"></a><a class="code" href="structCon.html">00242</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structCon.html">Con</a> {
<a name="l00243"></a>00243 <a class="code" href="structIos.html">Ios</a> ios; <span class="comment">/* raw output */</span>
<a name="l00244"></a>00244 <a class="code" href="structBuf.html">Buf</a> flt; <span class="comment">/* protocol filtered output */</span>
<a name="l00245"></a>00245 <span class="keyword">const</span> <a class="code" href="structSrv.html">Srv</a> *srv;
<a name="l00246"></a>00246 <span class="keyword">struct </span><a class="code" href="structCon.html">Con</a> *nxt;
<a name="l00247"></a>00247 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> stg; <span class="comment">/* processing stage (guarded by mutex) */</span>
<a name="l00248"></a>00248 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> pdg; <span class="comment">/* pending flags set by receiver only */</span>
<a name="l00249"></a>00249 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> grp; <span class="comment">/* thread group (0=main) set by receiver app calls */</span>
<a name="l00250"></a>00250 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> bin; <span class="comment">/* client requested binary mode */</span>
<a name="l00251"></a>00251 <span class="keywordtype">int</span> prt; <span class="comment">/* for free use by prt, 0 init */</span>
<a name="l00252"></a>00252 <span class="keywordtype">int</span> app; <span class="comment">/* for free use by app, 0 init */</span>
<a name="l00253"></a>00253 <span class="keywordtype">int</span> host;
<a name="l00254"></a>00254 <span class="keywordtype">char</span> nam[64]; <span class="comment">/* 123.123.123.123:123456 for IPv4 */</span>
<a name="l00255"></a>00255 Session ses;
<a name="l00256"></a>00256 <a class="code" href="structFld.html">Rec</a> *req; <span class="comment">/* request -- owned by srv->ses */</span>
<a name="l00257"></a>00257 <a class="code" href="structTm.html">Tm</a> tim; <span class="comment">/* time when the request was scheduled */</span>
<a name="l00258"></a>00258 <span class="comment">/* Rec *res; response -- owned by ses */</span>
<a name="l00259"></a>00259 <span class="keywordtype">int</span> con; <span class="comment">/* connection counter */</span>
<a name="l00260"></a>00260 } <a class="code" href="structCon.html">Con</a>;
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="keyword">extern</span> <a class="code" href="structWrk.html">Wrk</a> *svCur ();
<a name="l00263"></a>00263 <span class="keyword">extern</span> <span class="keywordtype">int</span> svRun ( <a class="code" href="structSrv.html">Srv</a> *srv, <span class="keyword">const</span> <span class="keywordtype">char</span> *addr );
<a name="l00264"></a>00264 <span class="comment">/* the plain protocol */</span>
<a name="l00265"></a>00265 <span class="keyword">extern</span> <span class="keywordtype">int</span> svPlain ( <a class="code" href="structIos.html">Ios</a> *s, <span class="keywordtype">int</span> op );
<a name="l00266"></a>00266 <span class="keyword">extern</span> <span class="keywordtype">int</span> svEcho ( <a class="code" href="structCon.html">Con</a> *c, <span class="keywordtype">int</span> task );
<a name="l00267"></a>00267
<a name="l00268"></a>00268 <span class="preprocessor">#define LSV_H</span>
<a name="l00269"></a>00269 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* LSV_H */</span>
</pre></div></div>
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