Drizzled Public API Documentation

release_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 #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 ReleaseLock::val_int()
00030 {
00031   drizzled::String *res= args[0]->val_str(&value);
00032 
00033   if (not res || not res->length())
00034   {
00035     my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_LOCK, MYF(0));
00036     return 0;
00037   }
00038   null_value= false;
00039 
00040   drizzled::identifier::User::const_shared_ptr user_identifier(getSession().user());
00041   drizzled::session_id_t id= getSession().getSessionId();
00042   locks::return_t result;
00043   {
00044     boost::this_thread::restore_interruption dl(getSession().getThreadInterupt());
00045     try {
00046       result= user_locks::Locks::getInstance().release(Key(*user_identifier, res->c_str()), id);
00047     }
00048     catch(boost::thread_interrupted const& error)
00049     {
00050       my_error(drizzled::ER_QUERY_INTERRUPTED, MYF(0));
00051       return 0;
00052     }
00053   }
00054 
00055   switch (result)
00056   {
00057   default:
00058   case locks::SUCCESS:
00059     {
00060       user_locks::Storable *list= static_cast<user_locks::Storable *>(getSession().getProperty("user_locks"));
00061       assert(list);
00062       if (list) // Just in case we ever blow the assert
00063         list->erase(Key(*user_identifier, res->c_str()));
00064 
00065       return 1;
00066     }
00067   case locks::NOT_FOUND:
00068     null_value= true;
00069     return 0;
00070   case locks::NOT_OWNED_BY:
00071     my_error(drizzled::ER_USER_LOCKS_NOT_OWNER_OF_LOCK, MYF(0));
00072     return 0;
00073   }
00074 }
00075 
00076 } /* namespace user_locks */