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// -*- C++ -*-
//
// $Id$
#ifndef TAO_SINGLETON_CPP
#define TAO_SINGLETON_CPP
#include "tao/TAO_Singleton.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/TAO_Singleton_Manager.h"
#include "ace/Guard_T.h"
#include "ace/Object_Manager.h"
#include "ace/Log_Msg.h"
#if !defined (__ACE_INLINE__)
#include "tao/TAO_Singleton.inl"
#endif /* __ACE_INLINE__ */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
template <class TYPE, class ACE_LOCK> void
TAO_Singleton<TYPE, ACE_LOCK>::dump (void)
{
ACE_TRACE ("TAO_Singleton<TYPE, ACE_LOCK>::dump");
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("instance_ = %x"),
TAO_Singleton<TYPE, ACE_LOCK>::instance_i ()));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> TAO_Singleton<TYPE, ACE_LOCK> *&
TAO_Singleton<TYPE, ACE_LOCK>::instance_i (void)
{
#if defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance. This works around a bug with
// G++ and it's (mis-)handling of templates and statics...
static TAO_Singleton<TYPE, ACE_LOCK> *singleton_ = 0;
return singleton_;
#else
return TAO_Singleton<TYPE, ACE_LOCK>::singleton_;
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> TYPE *
TAO_Singleton<TYPE, ACE_LOCK>::instance (void)
{
ACE_TRACE ("TAO_Singleton<TYPE, ACE_LOCK>::instance");
TAO_Singleton<TYPE, ACE_LOCK> *&singleton =
TAO_Singleton<TYPE, ACE_LOCK>::instance_i ();
// Perform the Double-Check pattern...
if (singleton == 0)
{
if (TAO_Singleton_Manager::starting_up () ||
TAO_Singleton_Manager::shutting_down ())
{
// The program is still starting up, and therefore assumed
// to be single threaded. There's no need to double-check.
// Or, the TAO_Singleton_Manager instance has been destroyed,
// so the preallocated lock is not available. Either way,
// don't register for destruction with the
// TAO_Singleton_Manager: we'll have to leak this instance.
ACE_NEW_RETURN (singleton, (TAO_Singleton<TYPE, ACE_LOCK>), 0);
}
else
{
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
// Obtain a lock from the ACE_Object_Manager. The pointer
// is static, so we only obtain one per TAO_Singleton
// instantiation.
static ACE_LOCK *lock = 0;
if (ACE_Object_Manager::get_singleton_lock (lock) != 0)
// Failed to acquire the lock!
return 0;
ACE_GUARD_RETURN (ACE_LOCK, ace_mon, *lock, 0);
if (singleton == 0)
{
#endif /* ACE_MT_SAFE */
ACE_NEW_RETURN (singleton, (TAO_Singleton<TYPE, ACE_LOCK>), 0);
// Register for destruction with TAO_Singleton_Manager.
TAO_Singleton_Manager::at_exit (singleton);
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
}
#endif /* ACE_MT_SAFE */
}
}
return &singleton->instance_;
}
template <class TYPE, class ACE_LOCK> void
TAO_Singleton<TYPE, ACE_LOCK>::cleanup (void *)
{
delete this;
TAO_Singleton<TYPE, ACE_LOCK>::instance_i () = 0;
}
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance.
template <class TYPE, class ACE_LOCK> TAO_Singleton<TYPE, ACE_LOCK> *
TAO_Singleton<TYPE, ACE_LOCK>::singleton_ = 0;
template <class TYPE, class ACE_LOCK> TAO_TSS_Singleton<TYPE, ACE_LOCK> *
TAO_TSS_Singleton<TYPE, ACE_LOCK>::singleton_ = 0;
#endif /* !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES) */
template <class TYPE, class ACE_LOCK> void
TAO_TSS_Singleton<TYPE, ACE_LOCK>::dump (void)
{
ACE_TRACE ("TAO_TSS_Singleton<TYPE, ACE_LOCK>::dump");
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("instance_ = %x"),
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i ()));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> TAO_TSS_Singleton<TYPE, ACE_LOCK> *&
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i (void)
{
#if defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance. This works around a bug with
// G++ and it's (mis-)handling of templates and statics...
static TAO_TSS_Singleton<TYPE, ACE_LOCK> *singleton_ = 0;
return singleton_;
#else
return TAO_TSS_Singleton<TYPE, ACE_LOCK>::singleton_;
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class ACE_LOCK> TYPE *
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance (void)
{
ACE_TRACE ("TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance");
TAO_TSS_Singleton<TYPE, ACE_LOCK> *&singleton =
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i ();
// Perform the Double-Check pattern...
if (singleton == 0)
{
if (TAO_Singleton_Manager::starting_up () ||
TAO_Singleton_Manager::shutting_down ())
{
// The program is still starting up, and therefore assumed
// to be single threaded. There's no need to double-check.
// Or, the TAO_Singleton_Manager instance has been destroyed,
// so the preallocated lock is not available. Either way,
// don't register for destruction with the
// TAO_Singleton_Manager: we'll have to leak this instance.
ACE_NEW_RETURN (singleton, (TAO_TSS_Singleton<TYPE, ACE_LOCK>), 0);
}
else
{
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
// Obtain a lock from the ACE_Object_Manager. The pointer
// is static, so we only obtain one per TAO_Singleton
// instantiation.
static ACE_LOCK *lock = 0;
if (ACE_Object_Manager::get_singleton_lock (lock) != 0)
// Failed to acquire the lock!
return 0;
ACE_GUARD_RETURN (ACE_LOCK, ace_mon, *lock, 0);
if (singleton == 0)
{
#endif /* ACE_MT_SAFE */
ACE_NEW_RETURN (singleton, (TAO_TSS_Singleton<TYPE, ACE_LOCK>),
0);
// Register for destruction with TAO_Singleton_Manager.
TAO_Singleton_Manager::at_exit (singleton);
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
}
#endif /* ACE_MT_SAFE */
}
}
return ACE_TSS_GET (&singleton->instance_, TYPE);
}
template <class TYPE, class ACE_LOCK> void
TAO_TSS_Singleton<TYPE, ACE_LOCK>::cleanup (void *)
{
delete this;
TAO_TSS_Singleton<TYPE, ACE_LOCK>::instance_i () = 0;
}
TAO_END_VERSIONED_NAMESPACE_DECL
#endif /* TAO_SINGLETON_CPP */
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