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// -*- C++ -*-
//
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// TAO_Singleton.h
//
// = DESCRIPTION
// Header file for the TAO-specific Singleton implementation.
// Based entirely on tao/TAO_Singleton.*.
//
// = AUTHOR
// Ossama Othman <ossama@uci.edu>
//
// ============================================================================
#ifndef TAO_SINGLETON_H
#define TAO_SINGLETON_H
#include "ace/pre.h"
#include "ace/Synch.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
template <class TYPE, class ACE_LOCK>
class TAO_Singleton : public ACE_Cleanup
{
// = TITLE
// TAO-specific Singleton class
//
// = DESCRIPTION
// TAO_Singletons are used by TAO to register TAO-specific
// singleton instances with the TAO_Object_Manager. This
// ensures that TAO singletons are isolated from ACE's
// Object_Manager, thus allowing TAO to be safely dynamically
// unloaded.
public:
static TYPE *instance (void);
// Global access point to the Singleton.
virtual void cleanup (void *param = 0);
// Cleanup method, used by <ace_cleanup_destroyer> to destroy the
// singleton.
static void dump (void);
// Dump the state of the object.
protected:
TAO_Singleton (void);
// Default constructor.
TYPE instance_;
// Contained instance.
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
static TAO_Singleton<TYPE, ACE_LOCK> *singleton_;
// Pointer to the Singleton (ACE_Cleanup) instance.
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
static TAO_Singleton<TYPE, ACE_LOCK> *&instance_i (void);
// Get pointer to the TAO Singleton instance.
};
template <class TYPE, class ACE_LOCK>
class TAO_TSS_Singleton : public ACE_Cleanup
{
// = TITLE
// TAO-specific Singleton class
//
// = DESCRIPTION
// TAO_Singletons are used by TAO to register TAO-specific
// singleton instances with the TAO_Object_Manager. This
// ensures that TAO singletons are isolated from ACE's
// Object_Manager, thus allowing TAO to be safely dynamically
// unloaded.
public:
static TYPE *instance (void);
// Global access point to the Singleton.
virtual void cleanup (void *param = 0);
// Cleanup method, used by <ace_cleanup_destroyer> to destroy the
// singleton.
static void dump (void);
// Dump the state of the object.
protected:
TAO_TSS_Singleton (void);
// Default constructor.
ACE_TSS_TYPE (TYPE) instance_;
// Contained instance.
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
static TAO_TSS_Singleton<TYPE, ACE_LOCK> *singleton_;
// Pointer to the Singleton (ACE_Cleanup) instance.
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
static TAO_TSS_Singleton<TYPE, ACE_LOCK> *&instance_i (void);
// Get pointer to the TAO TSS Singleton instance.
};
#if defined (__ACE_INLINE__)
#include "tao/TAO_Singleton.inl"
#endif /* __ACE_INLINE__ */
#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
#include "tao/TAO_Singleton.cpp"
#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
#pragma implementation ("TAO_Singleton.cpp")
#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
#include "ace/post.h"
#endif /* TAO_SINGLETON_H */
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