Drizzled Public API Documentation

release_wait.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 namespace locks {
00029 
00030 int64_t ReleaseAndWait::val_int()
00031 {
00032   drizzled::String *res= args[0]->val_str(&value);
00033 
00034   if (not res || not res->length())
00035   {
00036     my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_LOCK, MYF(0));
00037     return 0;
00038   }
00039   null_value= false;
00040 
00041   drizzled::identifier::User::const_shared_ptr user_identifier(getSession().user());
00042   drizzled::session_id_t id= getSession().getSessionId();
00043   locks::return_t result;
00044 
00045   {
00046     boost::this_thread::restore_interruption dl(getSession().getThreadInterupt());
00047     try {
00048       result= user_locks::Locks::getInstance().release(Key(*user_identifier, res->c_str()), id, true);
00049     }
00050     catch(boost::thread_interrupted const& error)
00051     {
00052       my_error(drizzled::ER_QUERY_INTERRUPTED, MYF(0));
00053       return 0;
00054     }
00055   }
00056 
00057   switch (result)
00058   {
00059   default:
00060   case locks::SUCCESS:
00061     {
00062       user_locks::Storable *list= static_cast<user_locks::Storable *>(getSession().getProperty("user_locks"));
00063       assert(list);
00064       if (list) // Just in case we ever blow the assert
00065         list->erase(Key(*user_identifier, res->c_str()));
00066       return 1;
00067     }
00068   case locks::NOT_FOUND:
00069     null_value= true;
00070     return 0;
00071   case locks::NOT_OWNED_BY:
00072     my_error(drizzled::ER_USER_LOCKS_NOT_OWNER_OF_LOCK, MYF(0));
00073     return 0;
00074   }
00075 }
00076 
00077 } /* namespace locks */
00078 } /* namespace user_locks */