OpenTTD
countedobj.cpp
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1 /* $Id: countedobj.cpp 27379 2015-08-10 20:04:31Z frosch $ */
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 
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 }