/*
*
*Delete a node by key(ptr->data).
*/
int DeleteByKey(cdlink * beg, data_t key)
{
cdlink *pos = FindByKey(beg, key);
if (NULL == pos)
return -1;
Free(pos);
return 0;
}
/*
*
* Alter a node's data by Key.
*
*/
int ChangeByKey(cdlink * beg, data_t key, data_t val)
{
cdlink *pos = FindByKey(beg, key);
if (NULL == pos)
return -1;
if (-1 == Change(pos, val))
return -1;
return 0;
}
int InsertByKey(cdlink * beg, data_t key, data_t val)
{
cdlink *pos = FindByKey(beg, key);
if (NULL == pos)
return -1;
if (-1 == Insert(pos, val))
return -1;
return 0;
}
void CMsgQueueHandler::MsgGet(const RMessage2& aMessage)
{
TInt tkey = aMessage.Int0 ();
// get flag to check whether we need to creat M Q
TInt tmsgflg = aMessage.Int1 ();
TBool creatMq = EFalse;
if ( IPC_PRIVATE == tkey)
{
creatMq = ETrue;
}
else
{
CMessageQueue* msqExist = FindByKey(tkey);
if ( msqExist)
{
if ( (tmsgflg & IPC_CREAT) && ( tmsgflg & IPC_EXCL) )
{
aMessage.Complete (KErrAlreadyExists);
return;
}
//compair the operation specified
//with the operation of existing flag.
//coverity[result_independent_of_operands]
if ( !tmsgflg || (tmsgflg | IPC_CREAT == IPC_CREAT) ||
msqExist->CheckPerm (tmsgflg, aMessage) )
{
TBuf8<MAXINT> temp;
temp.AppendNum(msqExist->UniqueId ());
aMessage.WriteL(2, temp);
aMessage.Complete (KErrNone);
return;
}
else
{
aMessage.Complete (KErrPermissionDenied);
return;
}
}
else
{
if ( tmsgflg & IPC_CREAT)
{
creatMq = ETrue;
}
else
{
aMessage.Complete (KErrNotFound);
return;
}
}
}
if ( creatMq)
{
if ( KIpcMaxNumberOfQueues == iMQueue.Count ())
{//max no of message queue is achived,
aMessage.Complete (KErrDiskFull);
return;
}
//create a message queue
CMessageQueue *tMsgQ = PosixIpcFactory::CreateMessageQueueL (aMessage);
iMQueue.AppendL (tMsgQ);
TBuf8<MAXINT> temp;
temp.AppendNum (tMsgQ->UniqueId ());
aMessage.WriteL (2, temp);
aMessage.Complete (KErrNone);
}
}
