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-rw-r--r--libio/libio.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/libio/libio.h b/libio/libio.h
index 11274aebb4..af74793369 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -516,6 +516,14 @@ extern _IO_ssize_t _IO_wpadn (_IO_FILE *, wint_t, _IO_ssize_t) __THROW;
 extern void _IO_free_wbackup_area (_IO_FILE *) __THROW;
 #endif
 
+static inline void
+_IO_acquire_lock_fct (_IO_FILE **p)
+{
+  _IO_FILE *fp = *p;
+  if ((fp->_flags & _IO_USER_LOCK) == 0)
+    _IO_funlockfile (fp);
+}
+
 #ifdef __cplusplus
 }
 #endif