ACE_TSS_Singleton< TYPE, ACE_LOCK > Class Template Reference

This class uses the Adapter pattern to turn ordinary classes into Thread-specific Singletons optimized with the Double-Checked Locking optimization pattern. More...

#include <Singleton.h>

Inheritance diagram for ACE_TSS_Singleton< TYPE, ACE_LOCK >:

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Collaboration diagram for ACE_TSS_Singleton< TYPE, ACE_LOCK >:

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List of all members.


Public Member Functions
virtual void	cleanup (void *param=0)
Static Public Member Functions
static TYPE *	instance (void)
	Global access point to the singleton.
static void	dump (void)
	Dump the state of the object.
Protected Member Functions
	ACE_TSS_Singleton (void)
	Default constructor.
	ACE_TSS_TYPE (TYPE) instance_
	Contained instance.
void	operator= (const ACE_TSS_Singleton< TYPE, ACE_LOCK > &)
	ACE_TSS_Singleton (const ACE_TSS_Singleton< TYPE, ACE_LOCK > &)
Static Protected Member Functions
static ACE_TSS_Singleton< TYPE, ACE_LOCK > *&	instance_i (void)
	Get pointer to the TSS Singleton instance.
Static Protected Attributes
static ACE_TSS_Singleton< TYPE, ACE_LOCK > *	singleton_ = 0
	Pointer to the Singleton (ACE_Cleanup) instance.

Detailed Description

template<class TYPE, class ACE_LOCK>
class ACE_TSS_Singleton< TYPE, ACE_LOCK >

This class uses the Adapter pattern to turn ordinary classes into Thread-specific Singletons optimized with the Double-Checked Locking optimization pattern.

This implementation is another variation on the GoF Singleton pattern. In this case, a single <ACE_TSS_Singleton<TYPE, LOCK> > instance is allocated here, not a <TYPE> instance. Each call to the <instance> static method returns a Singleton whose pointer resides in thread-specific storage. As with ACE_Singleton, we use the ACE_Object_Manager so that the Singleton can be cleaned up when the process exits. For this scheme to work, a (static) cleanup() function must be provided. ACE_Singleton provides one so that TYPE doesn't need to.