1 files changed, 43 insertions, 0 deletions
diff --git a/nptl/pthread_key_delete.c b/nptl/pthread_key_delete.c
new file mode 100644
index 0000000000..a0145f8efa
--- /dev/null
+++ b/nptl/pthread_key_delete.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include "pthreadP.h"
+#include <atomic.h>
+
+
+int
+pthread_key_delete (key)
+     pthread_key_t key;
+{
+  int result = EINVAL;
+
+  if (__builtin_expect (key < PTHREAD_KEYS_MAX, 1))
+    {
+      unsigned int seq = __pthread_keys[key].seq;
+
+      if (__builtin_expect (! KEY_UNUSED (seq), 1)
+	  && atomic_compare_and_exchange_acq (&__pthread_keys[key].seq,
+					      seq + 1, seq) == 0)
+	/* We deleted a valid key.  */
+	result = 0;
+    }
+
+  return result;
+}