//----------------------------------------------------------------------------
//  EgalTech 2023-2023
//----------------------------------------------------------------------------
// File : EXE_Mutex.cpp       Data : 05.02.23        Versione : 2.5a6
// Contenuto : Funzioni per gestione mutex.
//
//
//
// Modifiche : 05.02.23 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "EXE.h"
#include "/EgtDev/Include/EgtStringConverter.h"

using namespace std ;

//----------------------------------------------------------------------------
static HANDLE s_hMutex = NULL ;

//----------------------------------------------------------------------------
bool
ExeCreateMutex( const string& sMutexName)
{
   if ( s_hMutex != NULL)
      return false ;

   HANDLE hMutex = CreateMutex( NULL, TRUE, stringtoW( sMutexName)) ;

   if ( hMutex == NULL)
      return false ;
   else if ( GetLastError() == ERROR_ALREADY_EXISTS) {
      ReleaseMutex( hMutex) ;
      CloseHandle( hMutex) ;
      return false ;
   }
   else {
      s_hMutex = hMutex ;
      return true ;
   }
}

//----------------------------------------------------------------------------
bool
ExeReleaseMutex( void)
{
   if ( s_hMutex == NULL)
      return true ;

   bool bOk = ( ReleaseMutex( s_hMutex) != FALSE) ;
   CloseHandle( s_hMutex) ;
   s_hMutex = NULL ;
   return bOk ;
}