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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// ace
//
// = FILENAME
// Service_Object.h
//
// = AUTHOR
// Doug Schmidt
//
// ============================================================================
#ifndef ACE_SERVICE_OBJECT_H
#define ACE_SERVICE_OBJECT_H
#include "ace/Shared_Object.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Event_Handler.h"
class ACE_Export ACE_Service_Object : public ACE_Event_Handler, public ACE_Shared_Object
{
// = TITLE
// Provide the abstract base class common to all service
// implementations.
//
// = DESCRIPTION
// 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>).
public:
// = Initialization and termination methods.
ACE_Service_Object (ACE_Reactor * = 0);
// Constructor.
virtual ~ACE_Service_Object (void);
// Destructor.
virtual int suspend (void);
// Temporarily disable a service without removing it completely.
virtual int resume (void);
// Re-enable a previously suspended service.
};
// Forward decl.
class ACE_Service_Type_Impl;
class ACE_Export ACE_Service_Type
{
// = TITLE
// Keeps track of information related to the various
// <ACE_Service_Type_Impl> subclasses.
//
// = DESCRIPTION
// This class acts as the interface of the "Bridge" pattern.
public:
enum
{
DELETE_OBJ = 1,
// Delete the payload object.
DELETE_THIS = 2
// Delete the enclosing object.
};
// = Initialization and termination methods.
ACE_Service_Type (const ASYS_TCHAR *n,
ACE_Service_Type_Impl *o,
const ACE_SHLIB_HANDLE handle,
int active);
~ACE_Service_Type (void);
const ASYS_TCHAR *name (void) const;
void name (const ASYS_TCHAR *);
const char *chname (void) const;
const ACE_Service_Type_Impl *type (void) const;
void type (const ACE_Service_Type_Impl *,
int active = 1);
ACE_SHLIB_HANDLE handle (void) const;
void handle (const ACE_SHLIB_HANDLE);
void suspend (void) const;
void resume (void) const;
int active (void) const;
void active (int);
void fini (void);
// Calls fini() on <type_>
int fini_called (void) const;
// Check if the service has been fini'ed.
void dump (void) const;
// Dump the state of an object.
ACE_ALLOC_HOOK_DECLARE;
// Declare the dynamic allocation hooks.
private:
const ASYS_TCHAR *name_;
// Humanly readible name of svc.
#if defined (ACE_HAS_MOSTLY_UNICODE_APIS)
char *chname_;
// This interface is used to pass char name when instantiate
// ACE_Parse_Node.
#endif /* ACE_HAS_MOSTLY_UNICODE_APIS */
const ACE_Service_Type_Impl *type_;
// Pointer to C++ object that implements the svc.
ACE_SHLIB_HANDLE handle_;
// Handle to shared object file (non-zero if dynamically linked).
int active_;
// 1 if svc is currently active, otherwise 0.
int fini_already_called_;
// 1 if fini() on <type_> has already been called, otherwise 0.
};
class ACE_Export ACE_Service_Object_Ptr
{
// = TITLE
// 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.
//
// = DESCRIPTION
// 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.
public:
// = Initialization and termination methods.
ACE_Service_Object_Ptr (ACE_Service_Object *so);
// Acquire ownership of the <so>.
~ACE_Service_Object_Ptr (void);
// Release the held <ACE_Service_Object> by calling its <fini> hook.
ACE_Service_Object *operator-> ();
// Smart pointer to access the underlying <ACE_Service_Object>.
private:
ACE_Service_Object *service_object_;
// Holds the service object until we're done.
};
#if defined (__ACE_INLINE__)
#include "ace/Service_Object.i"
#endif /* __ACE_INLINE__ */
#endif /* ACE_SERVICE_OBJECT_H */
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