1 files changed, 43 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_rwlock_trywrlock.c b/libpthread/nptl/pthread_rwlock_trywrlock.c
new file mode 100644
index 000000000..a6f9ee435
--- /dev/null
+++ b/libpthread/nptl/pthread_rwlock_trywrlock.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 2002, 2003, 2007 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 <lowlevellock.h>
+
+
+int
+__pthread_rwlock_trywrlock (
+     pthread_rwlock_t *rwlock)
+{
+  int result = EBUSY;
+
+  lll_lock (rwlock->__data.__lock, rwlock->__data.__shared);
+
+  if (rwlock->__data.__writer == 0 && rwlock->__data.__nr_readers == 0)
+    {
+      rwlock->__data.__writer = THREAD_GETMEM (THREAD_SELF, tid);
+      result = 0;
+    }
+
+  lll_unlock (rwlock->__data.__lock, rwlock->__data.__shared);
+
+  return result;
+}
+strong_alias (__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock)