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<h1>/home/jklowden/releases/freetds-0.91/src/pool/pool.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* TDSPool - Connection pooling for TDS based databases</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2001 Brian Bruns</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * This program is free software; you can redistribute it and/or modify</span>
<a name="l00005"></a>00005 <span class="comment"> * it under the terms of the GNU General Public License as published by</span>
<a name="l00006"></a>00006 <span class="comment"> * the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00007"></a>00007 <span class="comment"> * (at your option) any later version.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * This program is distributed in the hope that it will be useful,</span>
<a name="l00010"></a>00010 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00011"></a>00011 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00012"></a>00012 <span class="comment"> * GNU General Public License for more details.</span>
<a name="l00013"></a>00013 <span class="comment"> *</span>
<a name="l00014"></a>00014 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
<a name="l00015"></a>00015 <span class="comment"> * along with this program; if not, write to the Free Software</span>
<a name="l00016"></a>00016 <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> */</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#ifndef _pool_h_</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#define _pool_h_</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="preprocessor">#if HAVE_SYS_TYPES_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#include <sys/types.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#endif</span>
<a name="l00026"></a>00026 <span class="preprocessor"></span>
<a name="l00027"></a>00027 <span class="preprocessor">#if HAVE_NETINET_IN_H</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#include <netinet/in.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#endif</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="comment">/* </span>
<a name="l00032"></a>00032 <span class="comment"> * POSIX says fd_set type may be defined in either sys/select.h or sys/time.h. </span>
<a name="l00033"></a>00033 <span class="comment"> */</span>
<a name="l00034"></a>00034 <span class="preprocessor">#if HAVE_SYS_TIME_H</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor">#include <sys/time.h></span>
<a name="l00036"></a>00036 <span class="preprocessor">#endif</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include "<a class="code" href="a00159.html" title="Main include file for libtds.">tds.h</a>"</span>
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <a class="code" href="a00286.html#gabf3d9f8d5fe5089e1f34594843486b75">TDS_RCSID</a>(pool_h, <span class="stringliteral">"$Id: pool.h,v 1.15 2006/06/12 19:45:59 freddy77 Exp $"</span>);
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="comment">/* defines */</span>
<a name="l00043"></a>00043 <span class="preprocessor">#define PGSIZ 2048</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span><span class="preprocessor">#define BLOCKSIZ 512</span>
<a name="l00045"></a>00045 <span class="preprocessor"></span><span class="preprocessor">#define MAX_POOL_USERS 1024</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span>
<a name="l00047"></a>00047 <span class="comment">/* enums and typedefs */</span>
<a name="l00048"></a>00048 <span class="keyword">typedef</span> <span class="keyword">enum</span>
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 TDS_SRV_LOGIN,
<a name="l00051"></a>00051 TDS_SRV_IDLE,
<a name="l00052"></a>00052 TDS_SRV_QUERY,
<a name="l00053"></a>00053 TDS_SRV_WAIT, <span class="comment">/* if no members are free wait */</span>
<a name="l00054"></a>00054 TDS_SRV_CANCEL,
<a name="l00055"></a>00055 TDS_SRV_DEAD
<a name="l00056"></a>00056 } TDS_USER_STATE;
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">/* forward declaration */</span>
<a name="l00059"></a>00059 <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="a00116.html">tds_pool_member</a> <a class="code" href="a00116.html">TDS_POOL_MEMBER</a>;
<a name="l00060"></a>00060
<a name="l00061"></a>00061
<a name="l00062"></a><a class="code" href="a00117.html">00062</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="a00117.html">tds_pool_user</a>
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <a class="code" href="a00122.html" title="Information for a server connection.">TDSSOCKET</a> *tds;
<a name="l00065"></a>00065 TDS_USER_STATE user_state;
<a name="l00066"></a>00066 <a class="code" href="a00116.html">TDS_POOL_MEMBER</a> *assigned_member;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068 <a class="code" href="a00117.html">TDS_POOL_USER</a>;
<a name="l00069"></a>00069
<a name="l00070"></a><a class="code" href="a00116.html">00070</a> <span class="keyword">struct </span><a class="code" href="a00116.html">tds_pool_member</a>
<a name="l00071"></a>00071 {
<a name="l00072"></a>00072 <a class="code" href="a00122.html" title="Information for a server connection.">TDSSOCKET</a> *tds;
<a name="l00073"></a>00073 <span class="comment">/* sometimes we get a partial packet */</span>
<a name="l00074"></a>00074 <span class="keywordtype">int</span> need_more;
<a name="l00075"></a>00075 <span class="keywordtype">int</span> state;
<a name="l00076"></a>00076 time_t last_used_tm;
<a name="l00077"></a>00077 <a class="code" href="a00117.html">TDS_POOL_USER</a> *current_user;
<a name="l00078"></a>00078 <span class="comment">/* </span>
<a name="l00079"></a>00079 <span class="comment"> * these variables are used for tracking the state of the TDS protocol </span>
<a name="l00080"></a>00080 <span class="comment"> * so we know when to return the state to TDS_IDLE.</span>
<a name="l00081"></a>00081 <span class="comment"> */</span>
<a name="l00082"></a>00082 <span class="keywordtype">int</span> num_bytes_left;
<a name="l00083"></a>00083 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> fragment[PGSIZ];
<a name="l00084"></a>00084 };
<a name="l00085"></a>00085
<a name="l00086"></a><a class="code" href="a00115.html">00086</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="a00115.html">tds_pool</a>
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <span class="keywordtype">char</span> *name;
<a name="l00089"></a>00089 <span class="keywordtype">char</span> *user;
<a name="l00090"></a>00090 <span class="keywordtype">char</span> *password;
<a name="l00091"></a>00091 <span class="keywordtype">char</span> *server;
<a name="l00092"></a>00092 <span class="keywordtype">char</span> *database;
<a name="l00093"></a>00093 <span class="keywordtype">int</span> port;
<a name="l00094"></a>00094 <span class="keywordtype">int</span> max_member_age; <span class="comment">/* in seconds */</span>
<a name="l00095"></a>00095 <span class="keywordtype">int</span> min_open_conn;
<a name="l00096"></a>00096 <span class="keywordtype">int</span> max_open_conn;
<a name="l00097"></a>00097 <span class="keywordtype">int</span> num_members;
<a name="l00098"></a>00098 <a class="code" href="a00116.html">TDS_POOL_MEMBER</a> *members;
<a name="l00099"></a>00099 <span class="keywordtype">int</span> max_users;
<a name="l00100"></a>00100 <a class="code" href="a00117.html">TDS_POOL_USER</a> *users;
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102 <a class="code" href="a00115.html">TDS_POOL</a>;
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="comment">/* prototypes */</span>
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="comment">/* member.c */</span>
<a name="l00107"></a>00107 <span class="keywordtype">int</span> pool_process_members(<a class="code" href="a00115.html">TDS_POOL</a> * pool, fd_set * fds);
<a name="l00108"></a>00108 <a class="code" href="a00116.html">TDS_POOL_MEMBER</a> *pool_find_idle_member(<a class="code" href="a00115.html">TDS_POOL</a> * pool);
<a name="l00109"></a>00109 <span class="keywordtype">void</span> pool_mbr_init(<a class="code" href="a00115.html">TDS_POOL</a> * pool);
<a name="l00110"></a>00110 <span class="keywordtype">void</span> pool_free_member(<a class="code" href="a00116.html">TDS_POOL_MEMBER</a> * pmbr);
<a name="l00111"></a>00111 <span class="keywordtype">void</span> pool_assign_member(<a class="code" href="a00116.html">TDS_POOL_MEMBER</a> * pmbr, <a class="code" href="a00117.html">TDS_POOL_USER</a> *puser);
<a name="l00112"></a>00112 <span class="keywordtype">void</span> pool_deassign_member(<a class="code" href="a00116.html">TDS_POOL_MEMBER</a> * pmbr);
<a name="l00113"></a>00113 <span class="keywordtype">void</span> pool_reset_member(<a class="code" href="a00116.html">TDS_POOL_MEMBER</a> * pmbr);
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="comment">/* user.c */</span>
<a name="l00116"></a>00116 <span class="keywordtype">int</span> pool_process_users(<a class="code" href="a00115.html">TDS_POOL</a> * pool, fd_set * fds);
<a name="l00117"></a>00117 <span class="keywordtype">void</span> pool_user_init(<a class="code" href="a00115.html">TDS_POOL</a> * pool);
<a name="l00118"></a>00118 <a class="code" href="a00117.html">TDS_POOL_USER</a> *pool_user_create(<a class="code" href="a00115.html">TDS_POOL</a> * pool, TDS_SYS_SOCKET s, <span class="keyword">struct</span> sockaddr_in *sin);
<a name="l00119"></a>00119 <span class="keywordtype">void</span> pool_free_user(<a class="code" href="a00117.html">TDS_POOL_USER</a> * puser);
<a name="l00120"></a>00120 <span class="keywordtype">void</span> pool_user_query(<a class="code" href="a00115.html">TDS_POOL</a> * pool, <a class="code" href="a00117.html">TDS_POOL_USER</a> * puser);
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="comment">/* util.c */</span>
<a name="l00123"></a>00123 <span class="keywordtype">void</span> dump_buf(<span class="keyword">const</span> <span class="keywordtype">void</span> *buf, <span class="keywordtype">int</span> length);
<a name="l00124"></a>00124 <span class="keywordtype">void</span> dump_login(<a class="code" href="a00107.html">TDSLOGIN</a> * login);
<a name="l00125"></a>00125 <span class="keywordtype">void</span> die_if(<span class="keywordtype">int</span> expr, <span class="keyword">const</span> <span class="keywordtype">char</span> *msg);
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="comment">/* config.c */</span>
<a name="l00128"></a>00128 <span class="keywordtype">int</span> pool_read_conf_file(<span class="keywordtype">char</span> *poolname, <a class="code" href="a00115.html">TDS_POOL</a> * pool);
<a name="l00129"></a>00129
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="preprocessor">#endif</span>
</pre></div></div>
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