X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fifo.h;h=61cc5a87bd473d939dc3ebe06f46f0cccb0f7fc1;hp=6a9115d48e4561702325b1921da191444b95f9eb;hb=d480f6c78e5594219d309800eaad71e29923ca68;hpb=e28875637094451a3c5ec4071f964c1a02dd8f5b

diff --git a/fifo.h b/fifo.h
index 6a9115d4..61cc5a87 100644
--- a/fifo.h
+++ b/fifo.h
@@ -1,3 +1,5 @@
+#ifndef FIO_FIFO_H
+#define FIO_FIFO_H
 /*
  * A simple FIFO implementation.
  *
@@ -15,9 +17,10 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  *
  */
+
 struct fifo {
 	unsigned char *buffer;	/* the buffer holding the data */
 	unsigned int size;	/* the size of the allocated buffer */
@@ -28,21 +31,16 @@ struct fifo {
 struct fifo *fifo_alloc(unsigned int);
 unsigned int fifo_put(struct fifo *, void *, unsigned int);
 unsigned int fifo_get(struct fifo *, void *, unsigned int);
+void fifo_free(struct fifo *);
 
 static inline unsigned int fifo_len(struct fifo *fifo)
 {
 	return fifo->in - fifo->out;
 }
 
-#define min(x,y) ({ \
-	typeof(x) _x = (x);	\
-	typeof(y) _y = (y);	\
-	(void) (&_x == &_y);		\
-	_x < _y ? _x : _y; })
-
-#define max(x,y) ({ \
-	typeof(x) _x = (x);	\
-	typeof(y) _y = (y);	\
-	(void) (&_x == &_y);		\
-	_x > _y ? _x : _y; })
+static inline unsigned int fifo_room(struct fifo *fifo)
+{
+	return fifo->size - fifo->in + fifo->out;
+}
 
+#endif