lockfile: add a new method, is_lock_file_locked()

It will soon prove useful.

Signed-off-by: Michael Haggerty <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: mhagger

lockfile.h

@@ -175,6 +175,14 @@ static inline int hold_lock_file_for_update(
 	return hold_lock_file_for_update_timeout(lk, path, flags, 0);
 }
 
+/*
+ * Return a nonzero value iff `lk` is currently locked.
+ */
+static inline int is_lock_file_locked(struct lock_file *lk)
+{
+	return is_tempfile_active(&lk->tempfile);
+}
+
 /*
  * Append an appropriate error message to `buf` following the failure
  * of `hold_lock_file_for_update()` to lock `path`. `err` should be the