callback_ref.cc

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// Callback helper function implementation -*- C++ -*-

// $Id: callback_ref.cc 347 2008-02-06 15:20:01Z schilly $
// Copyright (C) 2004 Hermann Schichl
//
// This file is part of the COCONUT API.  This library
// is free software; you can redistribute it and/or modify it under the
// terms of the Library GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library 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
// Library GNU General Public License for more details.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the Library GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the Library GNU General Public License.

#include <coconut_config.h>
#include <callback_ref.h>
#include <map>


static cb_ref_handle _next_ref=0;


static std::map<cb_ref_handle, void*> _ref_map;

cb_ref_handle _new_cb_ref(void* dest)
{
  cb_ref_handle ret = _next_ref++;
  _ref_map[ret] = dest;
  return ret;
}

int delete_cb_ref(cb_ref_handle ref)
{
  std::map<cb_ref_handle, void*>::iterator _x(_ref_map.find(ref));
  if(_x != _ref_map.end())
  {
    _ref_map.erase(_x);
    return 0;
  }
  else
    return -1;
}

void* cb_ref(cb_ref_handle ref)
{
  std::map<cb_ref_handle, void*>::iterator _x(_ref_map.find(ref));
  if(_x != _ref_map.end())
    return (*_x).second;
  else
    return NULL;
}

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