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/* -*- C++ -*- */
//=============================================================================
/**
* @file Service_Object.h
*
* $Id$
*
* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
*/
//=============================================================================
#ifndef ACE_SERVICE_OBJECT_H
#define ACE_SERVICE_OBJECT_H
#include /**/ "ace/pre.h"
#include "ace/Shared_Object.h"
#include "ace/Svc_Conf_Tokens.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Event_Handler.h"
#include "ace/DLL.h"
#include "ace/Service_Gestalt.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
#define ACE_Component ACE_Service_Object
/**
* @class ACE_Service_Object
*
* @brief Provide the abstract base class common to all service
* implementations.
*
* Classes that inherit from <ACE_Service_Objects> are capable
* of being registered with the ACE_Reactor (due to the
* ACE_Event_Handler, as well as being dynamically linked by
* the ACE_Service_Config (due to the <ACE_Shared_Object>).
*/
class ACE_Export ACE_Service_Object
: public ACE_Event_Handler,
public ACE_Shared_Object
{
public:
// = Initialization and termination methods.
/// Constructor.
ACE_Service_Object (ACE_Reactor * = 0);
/// Destructor.
virtual ~ACE_Service_Object (void);
/// Temporarily disable a service without removing it completely.
virtual int suspend (void);
/// Re-enable a previously suspended service.
virtual int resume (void);
};
// Forward decl.
class ACE_Service_Type_Impl;
/**
* @class ACE_Service_Type
*
* @brief Keeps track of information related to the various
* ACE_Service_Type_Impl subclasses.
*
* This class acts as the interface of the "Bridge" pattern.
*/
class ACE_Export ACE_Service_Type
{
public:
enum
{
/// Delete the payload object.
DELETE_OBJ = 1,
/// Delete the enclosing object.
DELETE_THIS = 2
};
enum
{
SERVICE_OBJECT = ACE_SVC_OBJ_T,
MODULE = ACE_MODULE_T,
STREAM = ACE_STREAM_T,
INVALID_TYPE = -1
};
// = Initialization and termination methods.
ACE_Service_Type (const ACE_TCHAR *n,
ACE_Service_Type_Impl *o,
const ACE_DLL &dll,
int active);
ACE_Service_Type (const ACE_TCHAR *n,
ACE_Service_Type_Impl *o,
ACE_SHLIB_HANDLE handle,
int active);
~ACE_Service_Type (void);
const ACE_TCHAR *name (void) const;
void name (const ACE_TCHAR *);
const ACE_Service_Type_Impl *type (void) const;
void type (const ACE_Service_Type_Impl *, int active = 1);
// Is this just a stub for the real thing?
bool is_forward_declaration (void) const;
int suspend (void) const;
int resume (void) const;
int active (void) const;
void active (int);
/// Calls <fini> on <type_>
int fini (void);
/// Check if the service has been fini'ed.
int fini_called (void) const;
/// Dump the state of an object.
void dump (void) const;
/// Get to the DLL's implentation
const ACE_DLL & dll () const;
/// Declare the dynamic allocation hooks.
ACE_ALLOC_HOOK_DECLARE;
private:
/// Humanly readible name of svc.
const ACE_TCHAR *name_;
/// Pointer to C++ object that implements the svc.
const ACE_Service_Type_Impl *type_;
/// ACE_DLL representing the shared object file (non-zero if
/// dynamically linked).
mutable ACE_DLL dll_;
/// 1 if svc is currently active, otherwise 0.
int active_;
/// 1 if <fini> on <type_> has already been called, otherwise 0.
int fini_already_called_;
};
/**
* @class ACE_Service_Object_Ptr
*
* @brief This is a smart pointer that holds onto the associated
* ACE_Service_Object * until the current scope is left, at
* which point the object's <fini> hook is called and the
* service_object_ gets deleted.
*
* This class is similar to the Standard C++ Library class
* <auto_ptr>. It is used in conjunction with statically linked
* <ACE_Service_Objects>, as shown in the
* ./netsvcs/server/main.cpp example.
*/
class ACE_Export ACE_Service_Object_Ptr
{
public:
// = Initialization and termination methods.
/// Acquire ownership of the @a so.
ACE_Service_Object_Ptr (ACE_Service_Object *so);
/// Release the held ACE_Service_Object by calling its <fini> hook.
~ACE_Service_Object_Ptr (void);
/// Smart pointer to access the underlying ACE_Service_Object.
ACE_Service_Object *operator-> ();
private:
/// Holds the service object until we're done.
ACE_Service_Object *service_object_;
};
ACE_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "ace/Service_Object.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* ACE_SERVICE_OBJECT_H */
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