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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// cos
//
// = FILENAME
// CC_LockSet.cpp
//
// = AUTHOR
// Torben Worm <tworm@cs.wustl.edu>
//
// ============================================================================
#include "CC_LockSet.h"
// Default constructor. We cannot create the lock at this point because we
// are not locking anything, and we do not know the mode of the lock. In a
// full fledged version the lock set (implementation) will be instantiated
// here
CC_LockSet::CC_LockSet(void)
: related_lockset_ (0)
{
// Do nothing
}
// Constructor used to create related lock sets.
CC_LockSet::CC_LockSet(CosConcurrencyControl::LockSet_ptr related)
: related_lockset_ (related)
{
// Do nothing
}
// Destructor. Remove the lock if it exists. In a later version the lock set
// must be removed here. Actually if all locks have been unlocked no lock
// instances should exist at this point.
CC_LockSet::~CC_LockSet(void)
{
if(lock_!=0)
delete lock_;
}
// Locks the lock in the desired mode. Blocks until success. In a later
// version the lock set should be searched for incompatible locks
void CC_LockSet::lock(CosConcurrencyControl::lock_mode mode,
CORBA::Environment &env)
{
if(lock==0) {
lock_ = new CC_Lock(mode);
}
lock_->lock();
}
// Tries to lock. If it is not possible false is returned. Comments for lock
// holds for later version
CORBA::Boolean CC_LockSet::try_lock(CosConcurrencyControl::lock_mode mode,
CORBA::Environment &env)
{
return lock_->try_lock();
}
// Drops the specified lock. In this simple case we have only one lock at
// any time so we just drop that lock.
void CC_LockSet::unlock(CosConcurrencyControl::lock_mode mode,
CORBA::Environment &env)
{
lock_->unlock();
}
// Changes the mode of a held lock. In this version we deal with only
// one type of lock (in reality) and therefore the type is of no meaning
void CC_LockSet::change_mode (CosConcurrencyControl::lock_mode held_mode,
CosConcurrencyControl::lock_mode new_mode,
CORBA::Environment &env)
{
lock_->change_mode(new_mode);
}
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