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// Singleton.cpp
// $Id$
#if !defined (ACE_SINGLETON_C)
#define ACE_SINGLETON_C
#define ACE_BUILD_DLL
#include "ace/Singleton.h"
#include "ace/Synch_T.h"
#if !defined (__ACE_INLINE__)
#include "ace/Singleton.i"
#endif /* __ACE_INLINE__ */
template <class TYPE, class LOCK> void
ACE_Singleton<TYPE, LOCK>::dump (void)
{
ACE_TRACE ("ACE_Singleton<TYPE, LOCK>::dump");
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
ACE_DEBUG ((LM_DEBUG, "instance_ = %x", instance_));
ace_singleton_lock_.dump ();
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
template <class TYPE, class LOCK> TYPE *
ACE_Singleton<TYPE, LOCK>::instance (void)
{
ACE_TRACE ("ACE_Singleton::instance");
#if defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance. This works around a bug with
// G++...
static TYPE *instance_ = 0;
// Lock the creation of the singleton. This works around a
// "feature" of G++... ;-)
static LOCK ace_singleton_lock_;
// Perform the Double-Check pattern...
if (instance_ == 0)
{
ACE_GUARD_RETURN (LOCK, ace_mon, ace_singleton_lock_, 0);
if (instance_ == 0)
ACE_NEW_RETURN (instance_, TYPE, 0);
}
return instance_;
#else
// Perform the Double-Check pattern...
if (ACE_Singleton<TYPE, LOCK>::instance_ == 0)
{
ACE_GUARD_RETURN (LOCK, ace_mon, (ACE_Singleton<TYPE, LOCK>::ace_singleton_lock_), 0);
if (ACE_Singleton<TYPE, LOCK>::instance_ == 0)
ACE_NEW_RETURN ((ACE_Singleton<TYPE, LOCK>::instance_), TYPE, 0);
}
return ACE_Singleton<TYPE, LOCK>::instance_;
#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
}
#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Pointer to the Singleton instance.
template <class TYPE, class LOCK> TYPE *
ACE_Singleton<TYPE, LOCK>::instance_ = 0;
// Lock the creation of the singleton.
template <class TYPE, class LOCK> LOCK
ACE_Singleton<TYPE, LOCK>::ace_singleton_lock_;
#endif /* !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES) */
#endif /* ACE_SINGLETON_C */
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