error.hpp

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//
// (c) Copyright 2017 DESY,ESS
//
// This file is part of h5cpp.
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 2.1 of the License, 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 ofMERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
// License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the
// Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor
// Boston, MA  02110-1301 USA
// ===========================================================================
//
// Author: Martin Shetty <martin.shetty@esss.se>
// Created on: Oct 25, 2017
//
#pragma once

#include <h5cpp/core/windows.hpp>
#include <h5cpp/error/h5c_error.hpp>

namespace hdf5 {
namespace error {


class DLL_EXPORT Singleton
{
 public:

  static Singleton& instance()
  {
    static Singleton singleton_instance;
    return singleton_instance;
  }

  void auto_print(bool enable);

  bool auto_print() const;

  H5CError extract_stack();

  void throw_with_stack(const std::string& message);

  void clear_stack();

 private:

  // Singleton assurance
  Singleton() {}
  Singleton(Singleton const&) = delete;
  void operator=(Singleton const&) = delete;

  bool auto_print_ {true};

 private:
  // Helper functions, used internally only

  // determines if automatic printing is enabled
  // should never be used when extracting error information,
  // as it will overwirte existing error stack contents
  bool auto_print_enabled() const;

  // extracts error stack and throws it as H5CError
  void throw_stack();

  // functor for H5EWalk
  static herr_t to_list(unsigned n,
                        const H5E_error2_t *err_desc,
                        std::list<Descriptor>* list);
};


std::string DLL_EXPORT print_nested(const std::exception& exception, int level =  0);


} // namespace file
} // namespace hdf5