Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 135 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/sparc/lowlevellock.h b/REORG.TODO/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
new file mode 100644
index 0000000000..e36fde6cae
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
@@ -0,0 +1,135 @@
+/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   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_H
+#define _LOWLEVELLOCK_H	1
+
+#include <time.h>
+#include <sys/param.h>
+#include <bits/pthreadtypes.h>
+#include <atomic.h>
+#include <kernel-features.h>
+
+#include <lowlevellock-futex.h>
+
+static inline int
+__attribute__ ((always_inline))
+__lll_trylock (int *futex)
+{
+  return atomic_compare_and_exchange_val_24_acq (futex, 1, 0) != 0;
+}
+#define lll_trylock(futex) __lll_trylock (&(futex))
+
+static inline int
+__attribute__ ((always_inline))
+__lll_cond_trylock (int *futex)
+{
+  return atomic_compare_and_exchange_val_24_acq (futex, 2, 0) != 0;
+}
+#define lll_cond_trylock(futex) __lll_cond_trylock (&(futex))
+
+
+extern void __lll_lock_wait_private (int *futex) attribute_hidden;
+extern void __lll_lock_wait (int *futex, int private) attribute_hidden;
+
+static inline void
+__attribute__ ((always_inline))
+__lll_lock (int *futex, int private)
+{
+  int val = atomic_compare_and_exchange_val_24_acq (futex, 1, 0);
+
+  if (__glibc_unlikely (val != 0))
+    {
+      if (__builtin_constant_p (private) && private == LLL_PRIVATE)
+	__lll_lock_wait_private (futex);
+      else
+	__lll_lock_wait (futex, private);
+    }
+}
+#define lll_lock(futex, private) __lll_lock (&(futex), private)
+
+static inline void
+__attribute__ ((always_inline))
+__lll_cond_lock (int *futex, int private)
+{
+  int val = atomic_compare_and_exchange_val_24_acq (futex, 2, 0);
+
+  if (__glibc_unlikely (val != 0))
+    __lll_lock_wait (futex, private);
+}
+#define lll_cond_lock(futex, private) __lll_cond_lock (&(futex), private)
+
+
+extern int __lll_timedlock_wait (int *futex, const struct timespec *,
+				 int private) attribute_hidden;
+
+static inline int
+__attribute__ ((always_inline))
+__lll_timedlock (int *futex, const struct timespec *abstime, int private)
+{
+  int val = atomic_compare_and_exchange_val_24_acq (futex, 1, 0);
+  int result = 0;
+
+  if (__glibc_unlikely (val != 0))
+    result = __lll_timedlock_wait (futex, abstime, private);
+  return result;
+}
+#define lll_timedlock(futex, abstime, private) \
+  __lll_timedlock (&(futex), abstime, private)
+
+#define lll_unlock(lock, private) \
+  ((void) ({								      \
+    int *__futex = &(lock);						      \
+    int __private = (private);						      \
+    int __val = atomic_exchange_24_rel (__futex, 0);			      \
+    if (__glibc_unlikely (__val > 1))					      \
+      lll_futex_wake (__futex, 1, __private);				      \
+  }))
+
+#define lll_islocked(futex) \
+  (futex != 0)
+
+/* Initializers for lock.  */
+#define LLL_LOCK_INITIALIZER		(0)
+#define LLL_LOCK_INITIALIZER_LOCKED	(1)
+
+/* The kernel notifies a process which uses CLONE_CHILD_CLEARTID via futex
+   wakeup when the clone terminates.  The memory location contains the
+   thread ID while the clone is running and is reset to zero
+   afterwards.	*/
+#define lll_wait_tid(tid) \
+  do							\
+    {							\
+      __typeof (tid) __tid;				\
+      while ((__tid = (tid)) != 0)			\
+	lll_futex_wait (&(tid), __tid, LLL_SHARED);	\
+    }							\
+  while (0)
+
+extern int __lll_timedwait_tid (int *, const struct timespec *)
+     attribute_hidden;
+
+#define lll_timedwait_tid(tid, abstime) \
+  ({							\
+    int __res = 0;					\
+    if ((tid) != 0)					\
+      __res = __lll_timedwait_tid (&(tid), (abstime));	\
+    __res;						\
+  })
+
+#endif	/* lowlevellock.h */