1 files changed, 48 insertions, 0 deletions
diff --git a/REORG.TODO/nptl/pthread_rwlock_unlock.c b/REORG.TODO/nptl/pthread_rwlock_unlock.c
new file mode 100644
index 0000000000..ef46e88263
--- /dev/null
+++ b/REORG.TODO/nptl/pthread_rwlock_unlock.c
@@ -0,0 +1,48 @@
+/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.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/>.  */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <futex-internal.h>
+#include <pthread.h>
+#include <pthreadP.h>
+#include <stap-probe.h>
+
+#include "pthread_rwlock_common.c"
+
+/* See pthread_rwlock_common.c for an overview.  */
+int
+__pthread_rwlock_unlock (pthread_rwlock_t *rwlock)
+{
+  LIBC_PROBE (rwlock_unlock, 1, rwlock);
+
+  /* We distinguish between having acquired a read vs. a write lock by looking
+     at the writer TID.  If it's equal to our TID, we must be the writer
+     because nobody else can have stored this value.  Also, if we are a
+     reader, we will read from the wrunlock store with value 0 by the most
+     recent writer because that writer happens-before us.  */
+  if (atomic_load_relaxed (&rwlock->__data.__cur_writer)
+      == THREAD_GETMEM (THREAD_SELF, tid))
+      __pthread_rwlock_wrunlock (rwlock);
+  else
+    __pthread_rwlock_rdunlock (rwlock);
+  return 0;
+}
+
+weak_alias (__pthread_rwlock_unlock, pthread_rwlock_unlock)
+hidden_def (__pthread_rwlock_unlock)