IServiceFactory.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2026 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
/*---------------------------------------------------------------------------*/
/* IServiceFactory.h                                           (C) 2000-2025 */
/*                                                                           */
/* Service manufacturing interface.                                          */
/*---------------------------------------------------------------------------*/
#ifndef ARCANE_CORE_ISERVICEFACTORY_H
#define ARCANE_CORE_ISERVICEFACTORY_H
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
#include "arcane/utils/Ref.h"
#include "arcane/core/ArcaneTypes.h"
 
#include <atomic>
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
namespace Arcane
{
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/

class ARCANE_CORE_EXPORT IServiceFactoryInfo
{
 public:

  virtual ~IServiceFactoryInfo() {}
 
 public:

  //TODO: check if autoload is still useful for these services.
  virtual bool isAutoload() const = 0;
  virtual bool isSingleton() const = 0;
 
 public:

  virtual IServiceInfo* serviceInfo() const = 0;
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
} // namespace Arcane
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
namespace Arcane::Internal
{
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/

class ARCANE_CORE_EXPORT IServiceFactory2
{
 protected:
 
  virtual ~IServiceFactory2() = default;
 
 public:

  virtual void addReference() = 0;
  virtual void removeReference() = 0;
 
 public:

  virtual ServiceInstanceRef createServiceInstance(const ServiceBuildInfoBase& sbi) = 0;

  virtual IServiceInfo* serviceInfo() const = 0;
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/

class ARCANE_CORE_EXPORT AbstractServiceFactory
: public IServiceFactory2
{
 protected:
 
  AbstractServiceFactory()
  : m_nb_ref(0)
  {}
 
 public:
 
  void addReference() override;
  void removeReference() override;
 
 private:
 
  std::atomic<Int32> m_nb_ref;
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/

template <typename InterfaceType>
class IServiceFactory2T
: public AbstractServiceFactory
{
 public:
 
  virtual Ref<InterfaceType> createServiceReference(const ServiceBuildInfoBase& sbi) = 0;
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/

class ARCANE_CORE_EXPORT ISingletonServiceFactory
{
 public:
 
  virtual ~ISingletonServiceFactory() = default;

  virtual Ref<ISingletonServiceInstance>
  createSingletonServiceInstance(const ServiceBuildInfoBase& sbi) = 0;

  virtual IServiceInfo* serviceInfo() const = 0;
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
} // namespace Arcane::Internal
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
#endif