Add unlikely macro

And use it for a really unlikely case

2 files changed, 4 insertions, 2 deletions

diff --git a/inotail.c b/inotail.c
index c0c5302..da881d4 100644
--- a/inotail.c
+++ b/inotail.c
@@ -245,8 +245,7 @@ static int watch_files(struct file_struct *f, int n_files)
 				}
 			}
 
-			/* Very unlikely! */
-			if (!fil)
+			if (unlikely(!fil))
 				break;
 
 			if (inev->mask & IN_MODIFY) {
diff --git a/inotail.h b/inotail.h
index d885855..f6e90e8 100644
--- a/inotail.h
+++ b/inotail.h
@@ -24,4 +24,7 @@ struct file_struct {
 # define dprintf(fmt, args...)
 #endif /* DEBUG */
 
+/* Taken from linux kernel source tree */
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
 #endif /* _INOTAIL_H */