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 #include <plugin/user_locks/module.h>
00023 #include <plugin/user_locks/lock_storage.h>
00024 
00025 #include <string>
00026 
00027 namespace user_locks {
00028 
00029 int64_t GetLock::val_int()
00030 {
00031   drizzled::String *res= args[0]->val_str(&value);
00032   int64_t wait_time= 0;
00033 
00034   if (arg_count == 2)
00035   {
00036     wait_time= args[1]->val_int();
00037   }
00038 
00039   if (not res || not res->length())
00040   {
00041     my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_LOCK, MYF(0));
00042     return 0;
00043   }
00044   null_value= false;
00045 
00046   user_locks::Storable *list= getSession().getProperty<user_locks::Storable>("user_locks");
00047   if (list) // To be compatible with MySQL, we will now release all other locks we might have.
00048     list->erase_all();
00049 
00050   drizzled::identifier::user::ptr user_identifier(getSession().user());
00051   {
00052     boost::this_thread::restore_interruption dl(getSession().getThreadInterupt());
00053 
00054     try 
00055     {
00056       if (not user_locks::Locks::getInstance().lock(getSession().getSessionId(), Key(*user_identifier, res->c_str()), wait_time))
00057         return 0;
00058     }
00059     catch (boost::thread_interrupted const&)
00060     {
00061       my_error(drizzled::ER_QUERY_INTERRUPTED, MYF(0));
00062       null_value= true;
00063       return 0;
00064     }
00065   }
00066   if (not list)
00067     list= getSession().setProperty("user_locks", new user_locks::Storable(getSession().getSessionId()));
00068   list->insert(Key(*user_identifier, res->c_str()));
00069   return 1;
00070 }
00071 
00072 } /* namespace user_locks */
Drizzled Public API Documentation
