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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO/orbsvcs/Concurrency_Service
//
// = FILENAME
// CC_LockSet.h
//
// = DESCRIPTION
// This class implements the lock set interface from the
// concurrency service
//
// = AUTHORS
// Torben Worm <tworm@cs.wustl.edu>
//
// ============================================================================
#if !defined (_CC_LOCKSET_H)
#define _CC_LOCKSET_H
// #include "tao/corba.h"
#include "CC_Lock.h"
#include "orbsvcs/CosConcurrencyControlS.h"
class TAO_ORBSVCS_Export CC_LockSet : public POA_CosConcurrencyControl::LockSet
// = TITLE
// CC_LockSet
//
// = DESCRIPTION
// This class implements the LockSet interface that is part of
// the CosConcurrency service. Please consult the idl file for
// detailed descriptions apart from the comments in this file At
// present the lock set is not really a set, but only one lock.
{
public:
// = Initialization and termination methods.
CC_LockSet(void);
// Default constructor
CC_LockSet(CosConcurrencyControl::LockSet_ptr related);
// Constructor used if create_related is used to create the lock
// set.
~CC_LockSet(void);
// Destructor.
virtual void lock (CosConcurrencyControl::lock_mode mode,
CORBA::Environment &env);
// Acquires this lock. Blocks until lock is obtained
virtual CORBA::Boolean try_lock (CosConcurrencyControl::lock_mode mode,
CORBA::Environment &env);
// Tries to acquire this lock. If it is not possible to acquire the
// lock, false is returned
virtual void unlock (CosConcurrencyControl::lock_mode mode,
CORBA::Environment &env);
// Releases this lock.
virtual void change_mode (CosConcurrencyControl::lock_mode held_mode,
CosConcurrencyControl::lock_mode new_mode,
CORBA::Environment &env);
// Changes the mode of this lock.
private:
CC_Lock *lock_;
// At present the lock set contains only one lock.
CosConcurrencyControl::LockSet_ptr related_lockset_;
// If this lock set is related to another lock set, this is the
// pointer to the related lock set. This is a really simple
// solution, but since transactions are not supported in the first
// version there should be no reason to drop lock sets together. The
// LockSetCoordinator is not implemented (it has the
// responsibilities of dropping the locks).
};
#endif /* _CC_LOCKSET_H */
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