/*~23/03/91 15.36.24! source1.c */

/*~xsys_init! source1.c */
/*
        Initialise subsystem XSYS.
        This function is called once.
        bla bla bla.

        Return -1 if not successfull
*/
int xsys_init(
	int memsize)	/* Amount of memory allocated to xsys */

/*~xsys_end! source1.c */
/*
        Terminate use of subsystem XSYS.

        This function frees all buffers and completes any pending operation.
        After it has been called, xsys_init may be call again.
*/
void xsys_end(
	void)
/*~23/03/91 15.36.56! source2.c */

/*~xsys_transact! source2.c */
/*
        Perform one transaction interactivly.

        The function returns only when transaction is secure.
*/
int xsys_transact(
	void)

/*~xsys_undo! source2.c */
/*
        Undo the last transaction.

        This function must be called only in this and this and this
        situation.

        Return -1 if transaction can't be undone.
*/
int xsys_undo(
	void)
/*~23/03/91 15.37.06! source3.c */

/*~xsys_batch! source3.c */
/*
        Perform one transaction without prompting the user.
        This function assumed a yes to each questions.

        The function returns immediatly without waiting for
        the background process to fully complete the transaction. See
        function xsys_flush().
*/
int xsys_batch(
	void)

/*~xsys_flush! source3.c */
/*
        Complete any pending transactions.

        This function must be called only in this and this and this
        situation.

        Return the number of transactions that has been completed.
*/
int xsys_flush(
	void)