MueLu_Behavior.cpp

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// @HEADER
// *****************************************************************************
//          Tpetra: Templated Linear Algebra Services Package
//
// Copyright 2008 NTESS and the Tpetra contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER
 
#include "Teuchos_EnvVariables.hpp"
#include "MueLu_Behavior.hpp"
#include <array>
#include <map>
 
// environ should be available on posix platforms
#if not(defined(WIN) && (_MSC_VER >= 1900))
// needs to be in the global namespace
extern char **environ;
#endif
 
namespace MueLu {
 
namespace BehaviorDetails {
 
constexpr const std::string_view DEBUG = "MUELU_DEBUG";
 
}  // namespace BehaviorDetails
 
namespace {  // (anonymous)
 
constexpr bool debugDefault() {
#ifdef HAVE_MUELU_DEBUG
  return true;
#else
  return false;
#endif  // HAVE_MUELU_DEBUG
}
 
}  // namespace
 
bool Behavior::debug() {
  constexpr bool defaultValue = debugDefault();
 
  static bool value_       = defaultValue;
  static bool initialized_ = false;
  return Teuchos::idempotentlyGetEnvironmentVariable(
      value_, initialized_, BehaviorDetails::DEBUG, defaultValue);
}
 
}  // namespace MueLu