G4ios.cc

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//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
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// *                                                                  *
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// * technical work of the GEANT4 collaboration.                      *
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// * any work based  on the software)  you  agree  to acknowledge its *
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// ********************************************************************
//
//
// $Id: G4ios.cc 110251 2018-05-17 14:09:28Z gcosmo $
//
// 
// --------------------------------------------------------------
//      GEANT 4 class implementation file
//
// G4ios.cc
//
// History 1998 Nov. 3 Masayasu Nagamatu

#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() == 0) _G4coutbuf_p() = new G4strstreambuf;
    if (_G4cerrbuf_p() == 0) _G4cerrbuf_p() = new G4strstreambuf;
    if (_G4cout_p() == &std::cout || _G4cout_p() == 0) _G4cout_p() = new std::ostream(_G4coutbuf_p());
    if (_G4cerr_p() == &std::cerr || _G4cerr_p() == 0) _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(); }
}

#else  // Sequential

G4strstreambuf G4coutbuf;
G4strstreambuf G4cerrbuf;
std::ostream G4cout(&G4coutbuf);
std::ostream G4cerr(&G4cerrbuf);

void G4iosInitialization() {}
void G4iosFinalization() {}

#endif