Drizzled Public API Documentation

release_barrier.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/barrier_storage.h>
00024 
00025 #include <string>
00026 
00027 namespace user_locks {
00028 namespace barriers {
00029 
00030 int64_t Release::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_BARRIER, MYF(0));
00037     null_value= true;
00038     return 0;
00039   }
00040 
00041 
00042   drizzled::identifier::User::const_shared_ptr user_identifier(getSession().user());
00043 
00044   barriers::return_t result= Barriers::getInstance().release(Key(*user_identifier, res->c_str()), getSession().getSessionId());
00045 
00046   switch (result)
00047   {
00048   default:
00049   case barriers::SUCCESS:
00050     {
00051       Storable *list= static_cast<Storable *>(getSession().getProperty(property_key));
00052       assert(list);
00053       if (not list) // We should have been the owner if it was passed to us, this should never happen
00054       {
00055         my_error(drizzled::ER_USER_LOCKS_NOT_OWNER_OF_BARRIER, MYF(0));
00056         null_value= true;
00057 
00058         return 0;
00059       }
00060       list->erase(Key(*user_identifier, res->c_str()));
00061       null_value= false;
00062 
00063       return 1;
00064     }
00065   case barriers::NOT_FOUND:
00066     my_error(drizzled::ER_USER_LOCKS_UNKNOWN_BARRIER, MYF(0));
00067     null_value= true;
00068     return 0;
00069   case barriers::NOT_OWNED_BY:
00070     my_error(drizzled::ER_USER_LOCKS_NOT_OWNER_OF_BARRIER, MYF(0));
00071     null_value= true;
00072     return 0;
00073   }
00074 }
00075 
00076 } /* namespace barriers */
00077 } /* namespace user_locks */