[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/mach/spin-solid.c b/ap/libc/glibc/glibc-2.23/mach/spin-solid.c
new file mode 100644
index 0000000..a81816a
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/mach/spin-solid.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 1994-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <spin-lock.h>
+#include <mach/mach_traps.h>
+
+void
+__spin_lock_solid (spin_lock_t *lock)
+{
+ while (__spin_lock_locked (lock) || ! __spin_try_lock (lock))
+ /* Yield to another thread (system call). */
+ __swtch_pri (0);
+}
+weak_alias (__spin_lock_solid, spin_lock_solid);