DllMain.icpp

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* (c) Copyright 1998-2019 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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//====================================================================
//  DllMain.cpp
//--------------------------------------------------------------------
//
//  Package    : Gaudi/System
//
//  Description: The DLL initialisation must be done seperately for
//               each DLL.
//
//  Author     : M.Frank
//  Created    : 13/1/99
//  Changes    :
//
//====================================================================
#ifndef SYSTEM_DLLMAIN_ICPP
#define SYSTEM_DLLMAIN_ICPP 1
 
// this header is only used by the deprecated GaudiKernel/LoadFactoryEntries.h
// but we want to make sure nobody else is using it
#if !defined( GAUDIKERNEL_LOADFACTORYENTRIES_H )
#  warning "deprecated header file, not to be used"
#endif
 
#include "GaudiKernel/Kernel.h"
#include "GaudiKernel/System.h"
 
#if !defined( __APPLE__ )
class GaudiDll {
  GaudiDll() {}
 
public:
  static void initialize( void* hinstDLL );
  static void finalize( void* hinstDLL );
};
#endif
 
#if defined( _WIN32 ) && defined( _DLL )
namespace win {
// Avoid conflicts between Windows' headers and MSG.
#  ifndef NOMSG
#    define NOMSG
#    ifndef NOGDI
#      define NOGDI
#    endif
#  endif
#  include <windows.h>
} // namespace win
 
win::BOOL APIENTRY DllMain( win::HINSTANCE hinstDLL,   // handle to DLL module
                            win::DWORD     fdwReason,  // reason for calling function
                            win::LPVOID    lpvReserved // reserved
) {
  System::setModuleHandle( hinstDLL );
  switch ( fdwReason ) {
  case DLL_PROCESS_ATTACH: {
    GaudiDll::initialize( hinstDLL );
  } break;
  case DLL_THREAD_ATTACH:
    break;
  case DLL_THREAD_DETACH:
    break;
  case DLL_PROCESS_DETACH: {
    GaudiDll::finalize( hinstDLL );
    // Since the System class is shared now, we may no longer close the
    // Process handle!  M.F.
    // win::CloseHandle(System::processHandle());
  } break;
  }
  return TRUE;
}
#elif __linux
static void _init() __attribute__( ( constructor ) );
static void _fini() __attribute__( ( destructor ) );
 
static void _init() { GaudiDll::initialize( 0 ); }
static void _fini() { GaudiDll::finalize( 0 ); }
#elif defined( __APPLE__ )
static void _init() __attribute__( ( constructor ) );
static void _fini() __attribute__( ( destructor ) );
 
static void _init() {
  // FIXME GaudiDll::initialize(0);
}
static void _fini() {
  // FIXME GaudiDll::finalize(0);
}
 
#endif // WIN32
 
#endif // SYSTEM_DLLMAIN_ICPP