IDGen.cpp

// @Begin License@
// This file is part of Coldest.
//
// Coldest 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, either version 3 of the License, or
// (at your option) any later version.
//
// Coldest 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.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Coldest.  If not, see <http://www.gnu.org/licenses/>.
//
// Copyright 2008-2012 Ben Nemec
// @End License@


#include "IDGen.h"

IDGen::IDGen() : nextid(0), incmutex(SDL_CreateMutex())
{
}


IDGen::~IDGen()
{
   SDL_DestroyMutex(incmutex);
}


unsigned long IDGen::next()
{
   SDL_mutexP(incmutex);
   unsigned long retval = nextid;
   ++nextid;
   SDL_mutexV(incmutex);
   return retval;
}


IDGen::operator unsigned long()
{
   return next();
}