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// -*- C++ -*-
//=============================================================================
/**
* @file Monitor_Base.h
*
* $Id$
*
* @author Jeff Parsons <j.parsons@vanderbilt.edu>
*/
//=============================================================================
#ifndef MONITOR_BASE_H
#define MONITOR_BASE_H
#include /**/ "ace/pre.h"
#include "ace/Monitor_Control_Types.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if defined (ACE_HAS_MONITOR_FRAMEWORK) && (ACE_HAS_MONITOR_FRAMEWORK == 1)
#include "ace/Refcountable_T.h"
#include "ace/Thread_Mutex.h"
#include "ace/Synch_Traits.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ETCL_Constraint;
namespace ACE
{
namespace MonitorControl
{
class Control_Action;
/**
* @class Monitor_Base
*
* @brief Base class from which the template monitor point class is
* derived.
*
* All the operations are pure virtual so they can
* be implemented in the 'disabled' template specialization
* as no-ops.
*/
class ACE_Export Monitor_Base
: private ACE_Refcountable_T<ACE_SYNCH_MUTEX>
{
public:
typedef Monitor_Control_Types::ConstraintList CONSTRAINTS;
typedef CONSTRAINTS::const_iterator CONSTRAINT_ITERATOR;
/// Implemented by the most-derived class. Does the actual
/// work of fetching the monitored value.
virtual void update (void) = 0;
/// Updates the monitor's data if it is a numeric floating point.
virtual void receive (double value);
/// Updates the monitor's data if it is an integer size.
virtual void receive (size_t value);
/// Add a constraint, returns a unique constraint id.
long add_constraint (const char* expression,
Control_Action* action = 0);
/// Remove a constraint and return the associated control action,
/// which may be shared, for deletion or further use.
Control_Action* remove_constraint (const long constraint_id);
/// Get all constraints
CONSTRAINTS& constraints (void);
/// Reset function.
void clear (void);
/// Data accessors.
void retrieve (Monitor_Control_Types::Data& data) const;
void retrieve_and_clear (Monitor_Control_Types::Data& data);
/// Common to all monitors.
void add_to_registry (
const ACE_Time_Value& time = ACE_Time_Value::zero);
void remove_from_registry (void);
const char* name (void) const;
void name (const char* new_name);
void add_ref (void);
void remove_ref (void);
protected:
Monitor_Base (void);
Monitor_Base (const char* name);
virtual ~Monitor_Base (void);
/// Overridden in some monitors (for example the OS monitors) where
/// clearing requires monitor-specific actions.
virtual void clear_i (void);
protected:
Monitor_Control_Types::Data data_;
mutable ACE_SYNCH_MUTEX mutex_;
CONSTRAINTS constraints_;
private:
ACE_CString name_;
};
}
}
ACE_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "ace/Monitor_Base.inl"
#endif /* __ACE_INLINE__ */
#endif /* ACE_HAS_MONITOR_FRAMEWORK==1 */
#include /**/ "ace/post.h"
#endif // MONITOR_BASE_H
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