add FUTEX_PRIVATE macro to internal futex.h

diff --git a/src/internal/futex.h b/src/internal/futex.h
index d7bf2b7..cf4c795 100644 (file)
--- a/src/internal/futex.h
+++ b/src/internal/futex.h
@@ -12,6 +12,8 @@
 #define FUTEX_TRYLOCK_PI       8
 #define FUTEX_WAIT_BITSET      9
 
+#define FUTEX_PRIVATE 128
+
 #define FUTEX_CLOCK_REALTIME 256
 
 int __futex(volatile int *, int, int, void *);