0 present participle of free
1 to allow someone to leave a prison or place where they have been kept:
2 to move or make loose someone or something that is caught or held somewhere:
3 to remove the limits or controls on someone or something:
Her retirement from politics will free her (= provide her with enough time) to write her memoirs.
4 to make something available for someone to use:
The government pursued every official channel to free the hostages.
She never gave up the struggle to have her son freed from prison.
Most political prisoners were freed under the terms of the amnesty.
The campaigners appealed to the government to free the prisoners.
In addition, the 'wealth effect' of transfers counteracts the 'freeing-up effect', which implies that per unit of subsidy fewer hectares of tropical forest are protected.
A typical solution is to add new operators to the abstract interface for freeing of abstract objects.
Thus, there is no need to lock it before freeing.