CTypeWrapper.h

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/*
 * Copyright 2006-2009 Savarese Software Research Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.savarese.com/software/ApacheLicense-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __SSRC_WSPR_UTILITY_C_TYPE_WRAPPER_H
#define __SSRC_WSPR_UTILITY_C_TYPE_WRAPPER_H

#include <ssrc/wispers-packages.h>

#include <boost/shared_ptr.hpp>

__BEGIN_NS_SSRC_WSPR_UTILITY

template<typename target_type, typename error_type,
         typename init_type, typename delete_type,
         template <typename t> class smart_ptr_type = boost::shared_ptr>
class CTypeWrapper : protected smart_ptr_type<target_type> {
  typedef smart_ptr_type<target_type> super;

  target_type *_target;
  error_type _err;

public:

  CTypeWrapper() : super(), _target(0) {
    init_type initialize;
    delete_type deleter;

    _err = initialize(&_target);
    if(_target)
      reset(_target, deleter);
  }

  template<typename init_parameter>
  explicit CTypeWrapper(const init_parameter & value) : super(), _target(0) {
    init_type initialize;
    delete_type deleter;

    _err = initialize(&_target, value);
    if(_target)
      reset(_target, deleter);
  }

  template<typename init_parameter, typename custom_initializer>
  CTypeWrapper(const init_parameter & value,
               const custom_initializer & initialize) :
    super(), _target(0)
  {
    delete_type deleter;

    _err = initialize(&_target, value);
    if(_target)
      reset(_target, deleter);
  }

  template<typename init_parameter,
           typename custom_initializer,
           typename custom_deleter>
  explicit CTypeWrapper(const init_parameter & value,
                        const custom_initializer & initialize,
                        const custom_deleter & deleter) :
    super(), _target(0)
  {
    _err = initialize(&_target, value);
    if(_target)
      reset(_target, deleter);
  }

  using super::operator typename super::unspecified_bool_type;
  using super::operator!;
  using super::operator*;
  using super::operator->;
  using super::get;

  error_type init_error() {
    return _err;
  }
};

__END_NS_SSRC_WSPR_UTILITY

#endif