Barkley turned down a move to Chelsea in the summer but has not signed a new deal at Goodison Park and could leave on a free transfer at the end of the season, something Allardyce says he would “hate” to see happen.
“It’s a difficult one,” said Allardyce.
“I haven’t had the opportunity yet to find out the true, or the whole, scenario and say, ‘Where does it lie?’ and then make a decision one way or the other.
“I’m not in control of that in too many ways. If someone comes in during January and says ‘here you go’, and the club say ‘look, if he’s not going to sign for us, this has to be the case’, then I accept that.
“If Ross stays, and stays until the end of the season, and I feel he is giving 100 per cent to the team, like he has done since he was a kid, then he is an available asset until he leaves on a free transfer.
“I would hate that to happen, but it might do.”