G4ios.cc

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// ********************************************************************
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// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
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// * include a list of copyright holders.                             *
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// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
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// * technical work of the GEANT4 collaboration.                      *
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// ********************************************************************
//
// G4ios implementation
//
// Authors: H.Yoshida, M.Nagamatu - November 1998
// --------------------------------------------------------------------
 
#include "G4ios.hh"
#include "G4strstreambuf.hh"
#include <iostream>
 
#ifdef G4MULTITHREADED
 
G4strstreambuf*& _G4coutbuf_p()
{
  G4ThreadLocalStatic G4strstreambuf* _instance = new G4strstreambuf();
  return _instance;
}
 
G4strstreambuf*& _G4cerrbuf_p()
{
  G4ThreadLocalStatic G4strstreambuf* _instance = new G4strstreambuf();
  return _instance;
}
 
std::ostream*& _G4cout_p()
{
  G4ThreadLocalStatic std::ostream* _instance =
    new std::ostream(_G4coutbuf_p());
  return _instance;
}
 
std::ostream*& _G4cerr_p()
{
  G4ThreadLocalStatic std::ostream* _instance =
    new std::ostream(_G4cerrbuf_p());
  return _instance;
}
 
#  define G4coutbuf (*_G4coutbuf_p())
#  define G4cerrbuf (*_G4cerrbuf_p())
#  define G4cout (*_G4cout_p())
#  define G4cerr (*_G4cerr_p())
 
void G4iosInitialization()
{
  if(_G4coutbuf_p() == nullptr)
    _G4coutbuf_p() = new G4strstreambuf;
  if(_G4cerrbuf_p() == nullptr)
    _G4cerrbuf_p() = new G4strstreambuf;
  if(_G4cout_p() == &std::cout || _G4cout_p() == nullptr)
    _G4cout_p() = new std::ostream(_G4coutbuf_p());
  if(_G4cerr_p() == &std::cerr || _G4cerr_p() == nullptr)
    _G4cerr_p() = new std::ostream(_G4cerrbuf_p());
}
 
void G4iosFinalization()
{
  delete _G4cout_p();
  _G4cout_p() = &std::cout;
  delete _G4cerr_p();
  _G4cerr_p() = &std::cerr;
  delete _G4coutbuf_p();
  _G4coutbuf_p() = nullptr;
  delete _G4cerrbuf_p();
  _G4cerrbuf_p() = nullptr;
}
 
// These two functions are guaranteed to be called at load and
// unload of the library containing this code.
namespace
{
#  ifndef WIN32
  void setupG4ioSystem(void) __attribute__((constructor));
  void cleanupG4ioSystem(void) __attribute__((destructor));
#  endif
  void setupG4ioSystem(void) { G4iosInitialization(); }
  void cleanupG4ioSystem(void) { G4iosFinalization(); }
}  // namespace
 
#else  // Sequential
 
G4strstreambuf G4coutbuf;
G4strstreambuf G4cerrbuf;
std::ostream G4cout(&G4coutbuf);
std::ostream G4cerr(&G4cerrbuf);
 
void G4iosInitialization() {}
void G4iosFinalization() {}
 
#endif