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 {
 
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wold-style-cast"
#endif
const decltype(H5E_DEFAULT) kDefault = H5E_DEFAULT;
#ifdef __clang__
#pragma clang diagnostic pop
#endif
 
 
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();
 
#ifdef __clang__
  [[ noreturn ]]
#endif
  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, size_t level =  0);
 
 
} // namespace file
} // namespace hdf5