Drizzled Public API Documentation

global_read_lock.cc

00001 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2010 Brian Aker
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; either version 2 of the License, or
00009  *  (at your option) any later version.
00010  *
00011  *  This program is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU General Public License
00017  *  along with this program; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00019  */
00020 
00021 #include <config.h>
00022 
00023 #include <drizzled/session.h>
00024 #include <plugin/utility_functions/functions.h>
00025 
00026 namespace drizzled
00027 {
00028 
00029 namespace utility_functions
00030 {
00031 
00032 int64_t GlobalReadLock::val_int()
00033 {
00034   assert(fixed == 1);
00035   null_value= false;
00036 
00037   if (getSession().isGlobalReadLock())
00038     return 1;
00039 
00040   return 0;
00041 }
00042 
00043 String *GlobalReadLock::val_str(String *str)
00044 {
00045   assert(fixed == 1);
00046   null_value= false;
00047   const std::string &global_state_for_session= display::type(getSession().isGlobalReadLock());
00048   str->copy(global_state_for_session.c_str(), global_state_for_session.length(), system_charset_info);
00049 
00050   return str;
00051 }
00052 
00053 void GlobalReadLock::fix_length_and_dec()
00054 {
00055   max_length= drizzled::display::max_string_length(getSession().isGlobalReadLock()) * system_charset_info->mbmaxlen;
00056 }
00057 
00058 } /* namespace utility_functions */
00059 } /* namespace drizzled */