src/misc/countedobj.cpp

   1 /* $Id: countedobj.cpp 17248 2009-08-21 20:21:05Z rubidium $ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file countedobj.cpp Support for reference counted objects. */
  11
  12 #include "../stdafx.h"
  13
  14 #include "countedptr.hpp"
  15
  16 #include "../safeguards.h"
  17
  18 int32 SimpleCountedObject::AddRef()
  19 {
  20         return ++m_ref_cnt;
  21 }
  22
  23 int32 SimpleCountedObject::Release()
  24 {
  25         int32 res = --m_ref_cnt;
  26         assert(res >= 0);
  27         if (res == 0) {
  28                 try {
  29                         FinalRelease(); // may throw, for example ScriptTest/ExecMode
  30                 } catch (...) {
  31                         delete this;
  32                         throw;
  33                 }
  34                 delete this;
  35         }
  36         return res;
  37 }