Drizzled Public API Documentation

wait_until.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 WaitUntil::val_int()
00031 {
00032   drizzled::String *res= args[0]->val_str(&value);
00033   int64_t wait_until= args[1]->val_int();
00034 
00035   if (res and res->length() and wait_until)
00036   {
00037     Barrier::shared_ptr barrier= Barriers::getInstance().find(Key(*getSession().user(), res->c_str()));
00038 
00039     if (barrier and barrier->getOwner() == getSession().getSessionId())
00040     {
00041       my_error(drizzled::ER_USER_LOCKS_CANT_WAIT_ON_OWN_BARRIER, MYF(0));
00042 
00043       return 0;
00044     }
00045     else if (barrier)
00046     {
00047       boost::this_thread::restore_interruption dl(getSession().getThreadInterupt());
00048       try {
00049         barrier->wait_until(wait_until);
00050       }
00051       catch(boost::thread_interrupted const&)
00052       {
00053         // We need to issue a different sort of error here
00054         my_error(drizzled::ER_QUERY_INTERRUPTED, MYF(0));
00055         return 0;
00056       }
00057 
00058       null_value= false;
00059 
00060       return 1;
00061     }
00062   }
00063   else if (not res || not res->length())
00064   {
00065     my_error(drizzled::ER_USER_LOCKS_INVALID_NAME_BARRIER, MYF(0));
00066     return 0;
00067   }
00068 
00069   my_error(drizzled::ER_USER_LOCKS_UNKNOWN_BARRIER, MYF(0));
00070   null_value= false;
00071 
00072   return 0;
00073 }
00074 
00075 } /* namespace barriers */
00076 } /* namespace user_locks */