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mySharedAllocator.h

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
 *
 */

#ifndef mySharedMemoryAllocatorHEADER
#define mySharedMemoryAllocatorHEADER

#include <PsMomeController.h>
#include <PsnSharedMemoryManager.h>
#include <PsnMemoryElementDescriptor.h>

class mySharedAllocator {
public:
   typedef size_t size_type;
   typedef ptrdiff_t difference_type;
   typedef void * pointer;

   mySharedAllocator () throw();
   mySharedAllocator(const mySharedAllocator &) throw();
   ~mySharedAllocator() throw();
      
   static pointer allocate(size_type n, const void * = 0) {
      PsnSharedMemoryManager * STLManager = PsMomeController::STLSharedMemoryManager;
      STLManager->lockIfNeeded();
      pointer resul(STLManager->mmalloc(n));
      STLManager->unlockIfNeeded();
      return resul;
   }

   static void deallocate(pointer p, size_type n) {
      PsnSharedMemoryManager * STLManager = PsMomeController::STLSharedMemoryManager;
      STLManager->lockIfNeeded();
      STLManager->mfree(p,n);
      STLManager->unlockIfNeeded();
   }

};

template <typename T> class mySharedAllocatorT;


template<>
class mySharedAllocatorT<void> {
public:
  typedef void*       pointer;
  typedef const void* const_pointer;
  typedef void        value_type;

  template <typename _Tp1> struct rebind {
    typedef mySharedAllocatorT<_Tp1> other;
  };
};

template <typename T> 
class mySharedAllocatorT {
public:
   typedef size_t size_type;
   typedef ptrdiff_t difference_type;
   typedef T * pointer;
   typedef const T* const_pointer;
   typedef T& reference;
   typedef const T & const_reference;
   typedef T value_type;

   template <typename T1> struct rebind {
      typedef mySharedAllocatorT<T1> other;
   };

   mySharedAllocatorT () throw() {
      //cerr<<"mySharedAllocatorT"<<endl;
   };
   mySharedAllocatorT(const mySharedAllocatorT &) throw() {
      //cerr<<"mySharedAllocatorT(const mySharedAllocatorT &)"<<endl;
   };
   template <typename U> mySharedAllocatorT(const mySharedAllocatorT<U> &) throw() {
      //cerr<<"mySharedAllocatorT(const mySharedAllocatorT<U> &)"<<endl;   
   }
   ~mySharedAllocatorT() throw() {
      //cerr<<"~mySharedAllocatorT()"<<endl;
   };
   
   pointer address(reference x) const {
      return &x;
   }

   const_pointer address(const_reference x) const {
      return &x;
   }
   
   pointer allocate(size_type n, mySharedAllocatorT<void>::const_pointer hint  = 0) {
      if(n<0) {
         n=0;
      }
      PsnSharedMemoryManager * STLManager = PsMomeController::STLSharedMemoryManager;
      //cerr<<"mySharedAllocator::allocate avant lock()"<<endl;
      STLManager->lockIfNeeded();
      //cerr<<"mySharedAllocator::allocate après lock()"<<endl;
      pointer resul=(pointer)PsMomeController::STLSharedMemoryManager->mmalloc(n*sizeof(T));
      STLManager->unlockIfNeeded();
      return resul;
   }

   void deallocate(pointer p, size_type n) {
      PsnSharedMemoryManager * STLManager = PsMomeController::STLSharedMemoryManager;
      STLManager->lockIfNeeded();
      PsMomeController::STLSharedMemoryManager->mfree((void *)p,n*sizeof(T));
      STLManager->unlockIfNeeded();
   }

   size_type max_size() const throw() {
      cerr<<"mySharedAllocatorT::max_size"<<endl;
      return 16374;
   }

   void construct(pointer p, const T& val) {
      cerr<<"mySharedAllocatorT::construct"<<endl;
      return new((void *)p) T(val);
   };

   void destroy(pointer p) {
      cerr<<"mySharedAllocatorT::destroy"<<endl;
      ((T*)p)->~T() ;
   }
};


#endif

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