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PsnSharedArrayMemoryManager.cxx

Go to the documentation of this file.

/*
 * This file is part of openMask © INRIA, CNRS, Universite de Rennes 1 1993-2002, thereinafter the Software
 * 
 * The Software has been developped within the Siames Project. 
 * INRIA, the University of Rennes 1 and CNRS jointly hold intellectual property rights
 * 
 * The Software has been registered with the Agence pour la Protection des
 * Programmes (APP) under registration number IDDN.FR.001.510008.00.S.P.2001.000.41200
 *  
 * This file may be distributed under the terms of the Q Public License
 * version 1.0 as defined by Trolltech AS of Norway and appearing in the file
 * LICENSE.QPL included in the packaging of this file.
 *
 * Licensees holding valid specific licenses issued by INRIA, CNRS or Université de Rennes 1 
 * for the software may use this file in accordance with that specific license
 *
 */
#include "PsnSharedArrayMemoryManager.h"
#include "PsnMemoryElementDescriptor.h"
#include "PsnRelaxedMemoryManager.h"

PsnSharedArrayMemoryManager::PsnSharedArrayMemoryManager(size_t sizeDsm, size_t pageSize, size_t alignedSize, PsnRelaxedMemoryManager & memoryManager, int queueSize) :
   PsnFramedMemoryManager(sizeDsm * queueSize,
                          pageSize, 
                          alignedSize, 
                          memoryManager, 
                          queueSize),
   _stepSize(sizeDsm) 
{
   _freeMem = new PsnMemoryElementDescriptor() ;
   _freeMem->base = 0 ;
   _freeMem->next = (unsigned int) NULL ;
   _freeMem->size = _blockSize ;

   //here, we place a little shortcut for easy allocation and deallocation : we suppose a PsnSharedArrayMemoryManager has a _blockSize comprised of very little pages (often 1) and that allocation in these pages takes place immediatly after creation.
   for (int i = _queueSize - 1 ; i >= 0 ; i-- ) {//in reverse order because of the underlying set
      addBlockInSync( i );
   }
}

PsnSharedArrayMemoryManager::~PsnSharedArrayMemoryManager() {
   assert (_freeMem->size == _blockSize ) ;
   delete _freeMem ;
}

void * PsnSharedArrayMemoryManager::mmalloc( size_t size ) {
#ifdef _DEBUGALLOCATIONMOME
   cerr<<"PsnSharedArrayMemoryManager::mmalloc "<<size<<" "<<& _freeMem<<" ";
#endif
   void * resul = getFromThisFree( & _freeMem , size) ;
#ifdef _DEBUGALLOCATIONMOME
   cerr<<resul<<endl;;
#endif
   if (resul != NULL) _sizeLeft -= size ;
   return resul ;
}

void PsnSharedArrayMemoryManager::mfree ( void * ptr, size_t size ) {
   addInThisFree ( & _freeMem , globalAddressToLocal(ptr), size ) ;
   _sizeLeft += size ;
}
 

size_t PsnSharedArrayMemoryManager::getStepSize() {
   return _stepSize ;
}

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