[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/sysdeps/nacl/lowlevellock-futex.h b/ap/libc/glibc/glibc-2.23/sysdeps/nacl/lowlevellock-futex.h
new file mode 100644
index 0000000..5382f68
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/sysdeps/nacl/lowlevellock-futex.h
@@ -0,0 +1,90 @@
+/* Low-level locking access to futex facilities. NaCl version.
+ Copyright (C) 2015-2016 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/>. */
+
+#ifndef _LOWLEVELLOCK_FUTEX_H
+#define _LOWLEVELLOCK_FUTEX_H 1
+
+#include <nacl-interfaces.h>
+#include <time.h>
+
+
+#pragma GCC diagnostic ignored "-Wunused-value" /* XXX */
+
+/* Values for 'private' parameter of locking macros. Note pthreadP.h
+ optimizes for these exact values, though they are not required. */
+#define LLL_PRIVATE 0
+#define LLL_SHARED 128
+
+#define FUTEX_PRIVATE_FLAG 0 /* XXX */
+
+
+/* Wait while *FUTEXP == VAL for an lll_futex_wake call on FUTEXP. */
+#define lll_futex_wait(futexp, val, private) \
+ ((void) (private), \
+ - __nacl_irt_futex.futex_wait_abs ((volatile int *) (futexp), val, NULL))
+
+/* Wait until a lll_futex_wake call on FUTEXP, or TIMEOUT elapses. */
+#define lll_futex_timed_wait(futexp, val, timeout, private) \
+ ({ \
+ /* This timeout is relative, but the IRT call wants it absolute. */\
+ const struct timespec *_to = (timeout); \
+ struct timespec _ts; \
+ int _err = 0; \
+ if (_to != NULL \
+ && __glibc_likely ((_err = __nacl_irt_clock.clock_gettime \
+ (CLOCK_REALTIME, &_ts)) == 0)) \
+ { \
+ _ts.tv_sec += _to->tv_sec; \
+ _ts.tv_nsec += _to->tv_nsec; \
+ while (_ts.tv_nsec >= 1000000000) \
+ { \
+ _ts.tv_nsec -= 1000000000; \
+ ++_ts.tv_sec; \
+ } \
+ _to = &_ts; \
+ } \
+ if (_err == 0) \
+ _err = __nacl_irt_futex.futex_wait_abs \
+ ((volatile int *) (futexp), val, _to); \
+ (void) (private); \
+ -_err; \
+ })
+
+/* Wake up up to NR waiters on FUTEXP. */
+#define lll_futex_wake(futexp, nr, private) \
+ ({ \
+ int _woken; \
+ (void) (private); \
+ - __nacl_irt_futex.futex_wake ((volatile int *) (futexp), nr, &_woken); \
+ })
+
+/* NaCl does not support the requeue operation. The only use of this is in
+ pthread_cond_broadcast, which handles an error return by falling back to
+ plain lll_futex_wake. */
+#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val, private) \
+ ((futexp), (nr_wake), (nr_move), (mutex), (val), (private), -ENOSYS)
+
+/* NaCl does not support the special wake-unlock operation. The only use
+ of this is in pthread_cond_signal, which handles an error return by
+ falling back to plain lll_futex_wake. */
+/* Wake up up to NR_WAKE waiters on FUTEXP and NR_WAKE2 on FUTEXP2. */
+#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2, private) \
+ ((futexp), (nr_wake), (nr_wake2), (futexp2), (private), -ENOSYS)
+
+
+#endif /* lowlevellock-futex.h */