82 	int	counter;	/* size of data in buffer, or flag */  member
113 	bfs[0].counter = BF_ALLOC;	/* pass out the first buffer */  in rw_init()
115 	bfs[1].counter = BF_FREE;  in rw_init()
130 	bfs[current].counter = BF_FREE; /* free old one */  in readit()
134 	if (b->counter == BF_FREE)	/* if it's empty */  in readit()
137 	return (b->counter);  in readit()
154 	if (b->counter != BF_FREE)	/* nop if not free */  in read_ahead()
161 		b->counter = fread(dp->th_data, sizeof (char), blocksize,  in read_ahead()
164 			b->counter = -1;  in read_ahead()
186 	b->counter = (int)(p - dp->th_data);  in read_ahead()
197 	bfs[current].counter = ct;	/* set size of data to write */  in writeit()
199 	if (bfs[current].counter != BF_FREE)	/* if not free */  in writeit()
202 	bfs[current].counter = BF_ALLOC;	/* mark as alloc'd */  in writeit()
225 	if (b->counter < -1)	/* anything to flush? */  in write_behind()
228 	count = b->counter;	/* remember byte count */  in write_behind()
229 	b->counter = BF_FREE;	/* reset flag */  in write_behind()