ServiceFactory.cc

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2022 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
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/* ServiceFactory.cc                                           (C) 2000-2019 */
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/* Fabrique des services/modules.                                            */
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#include "arcane/utils/List.h"
 
#include "arcane/IServiceInfo.h"
#include "arcane/ServiceFactory.h"
#include "arcane/ServiceInstance.h"
 
#include <iostream>
 
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namespace Arcane::Internal
{
 
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class SingletonServiceFactoryBase::ServiceInstance
: public ISingletonServiceInstance
, public IServiceInstanceAdder
{
 public:
  ServiceInstance(IServiceInfo* si)
  : m_service_info(si){}
  ~ServiceInstance()
  {
    destroyInstance();
  }
 public:
  void addReference() override { ++m_nb_ref; }
  void removeReference() override
  {
    Int32 v = std::atomic_fetch_add(&m_nb_ref,-1);
    if (v==1)
      delete this;
  }
 public:
  ServiceInstanceCollection interfaceInstances() override { return m_instances; }
  void destroyInstance()
  {
    m_true_instance.reset();
    m_instances.clear();
  }
  IServiceInfo* serviceInfo() const override { return m_service_info; }
  void setTrueInstance(ServiceInstanceRef si) { m_true_instance = si; }
 public:
  void addInstance(ServiceInstanceRef instance) override
  {
    m_instances.add(instance);
  }
 private:
  IServiceInfo* m_service_info;
  List<ServiceInstanceRef> m_instances;
  ServiceInstanceRef m_true_instance;
  std::atomic<Int32> m_nb_ref = 0;
};
 
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Ref<ISingletonServiceInstance> SingletonServiceFactoryBase::
createSingletonServiceInstance(const ServiceBuildInfoBase& sbib)
{
  auto x = new ServiceInstance(m_service_info);
  IServiceInstanceAdder* sia = x;
  ServiceInstanceRef si = _createInstance(sbib,sia);
  x->setTrueInstance(si);
  return makeRef<ISingletonServiceInstance>(x);
}
 
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void AbstractServiceFactory::
addReference()
{
  ++m_nb_ref;
}
 
void AbstractServiceFactory::
removeReference()
{
  // Décrémente et retourne la valeur d'avant.
  // Si elle vaut 1, cela signifie qu'on n'a plus de références
  // sur l'objet et qu'il faut le détruire.
  Int32 v = std::atomic_fetch_add(&m_nb_ref,-1);
  if (v==1)
    delete this;
}
 
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} // End namespace Arcane::Internal
 
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