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Viewing changes to plugin/connection_id/connection_id.cc

  • Committer: devananda
  • Date: 2009-07-05 16:50:29 UTC
  • mto: (1086.8.1 connectionid-plugin)
  • mto: This revision was merged to the branch mainline in revision 1095.
  • Revision ID: devananda.vdv@gmail.com-20090705165029-atb0s277kau9ei13
refactored function/connection_id into plugin/connection_id

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plugin/connection_id/connection_id.cc
 
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 
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 *
 
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 *  Copyright (C) 2008 Sun Microsystems
 
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 *
 
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 *  This program is free software; you can redistribute it and/or modify
 
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 *  it under the terms of the GNU General Public License as published by
 
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 *  the Free Software Foundation; version 2 of the License.
 
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 *
 
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 *  This program is distributed in the hope that it will be useful,
 
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 *  GNU General Public License for more details.
 
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 *
 
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 *  You should have received a copy of the GNU General Public License
 
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 *  along with this program; if not, write to the Free Software
 
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
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 */
 
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#include <drizzled/server_includes.h>
 
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#include <drizzled/function/math/int.h>
 
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#include <drizzled/function/create.h>
 
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#include <drizzled/session.h>
 
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using namespace std;
 
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class ConnectionIdFunction :public Item_int_func
 
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{
 
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  int64_t value;
 
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public:
 
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  ConnectionIdFunction() :Item_int_func() {}
 
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  int64_t val_int() 
 
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  {
 
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    assert(fixed==1);
 
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    return value;
 
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  }
 
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  const char *func_name() const 
 
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  { 
 
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    return "connection_id"; 
 
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  }
 
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  void fix_length_and_dec() 
 
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  {
 
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    Item_int_func::fix_length_and_dec();
 
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    max_length= 10;
 
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  }
 
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  bool fix_fields(Session *session, Item **ref)
 
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  {
 
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    if (Item_int_func::fix_fields(session, ref))
 
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      return true;
 
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    value= session->variables.pseudo_thread_id;
 
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    return false;
 
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  }
 
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  bool check_argument_count(int n)
 
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  {
 
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    return (n==0);
 
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  }
 
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};
 
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Create_function<ConnectionIdFunction> connection_idudf(string("connection_id"));
 
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static int initialize(PluginRegistry &registry)
 
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{
 
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  registry.add(&connection_idudf);
 
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  return 0;
 
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}
 
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static int finalize(PluginRegistry &registry)
 
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{
 
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   registry.remove(&connection_idudf);
 
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   return 0;
 
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}
 
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drizzle_declare_plugin(ascii)
 
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{
 
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  "connection_id",
 
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  "1.0",
 
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  "Devananda van der Veen",
 
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  "Return the current connection_id",
 
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  PLUGIN_LICENSE_GPL,
 
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  initialize, /* Plugin Init */
 
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  finalize,   /* Plugin Deinit */
 
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  NULL,   /* status variables */
 
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  NULL,   /* system variables */
 
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  NULL    /* config options */
 
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}
 
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drizzle_declare_plugin_end;