TGo4LockGuard.cxx

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// $Id$
//-----------------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//         Experiment Data Processing at EE department, GSI
//-----------------------------------------------------------------------
// Copyright (C) 2000- GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
//                     Planckstr. 1, 64291 Darmstadt, Germany
// Contact:            http://go4.gsi.de
//-----------------------------------------------------------------------
// This software can be used under the license agreements as stated
// in Go4License.txt file which is part of the distribution.
//-----------------------------------------------------------------------
 
#include "TGo4LockGuard.h"
 
#include "TMutex.h"
 
TMutex *TGo4LockGuard::fgxMainMutex = nullptr;
 
Int_t TGo4LockGuard::fgiLockCount = 0;
 
 
TGo4LockGuard::TGo4LockGuard (TMutex *mutex, Bool_t)
{
   // first call: create main mutex
        //  std::cout <<"G-----TGo4LockGuard ctor" << std::endl;
        //
   if(!fgxMainMutex)
      fgxMainMutex = new TMutex(kTRUE); // we use recursive mode for cascading lockguards
   if(!mutex) {
      // use global mutex
      fxMutex = fgxMainMutex;
      fbIsMainMutex = kTRUE;
   } else {
      // use external mutex
      fxMutex = mutex;
      fbIsMainMutex = kFALSE;
   }
 
   fxMutex->Lock();
   fbIsLocked = kTRUE;
   if(fbIsMainMutex) fgiLockCount++;
}
 
TGo4LockGuard::~TGo4LockGuard()
{
   if (fbIsLocked) {
        if(fbIsMainMutex) fgiLockCount--;
        fxMutex->UnLock();
   }
}
 
Int_t TGo4LockGuard::MainMutexLockCount()
{
   return fgiLockCount;
}
 
void TGo4LockGuard::LockMainMutex()
{
  fgxMainMutex->Lock();
}
 
void TGo4LockGuard::UnLockMainMutex()
{
  fgxMainMutex->UnLock();
}