[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/hurd/fd-close.c b/ap/libc/glibc/glibc-2.23/hurd/fd-close.c
new file mode 100644
index 0000000..f1e067f
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/hurd/fd-close.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 1994-2016 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/>. */
+
+#include <hurd/fd.h>
+
+error_t
+_hurd_fd_close (struct hurd_fd *fd)
+{
+ error_t err;
+
+ HURD_CRITICAL_BEGIN;
+
+ __spin_lock (&fd->port.lock);
+ if (fd->port.port == MACH_PORT_NULL)
+ {
+ __spin_unlock (&fd->port.lock);
+ err = EBADF;
+ }
+ else
+ {
+ /* Clear the descriptor's port cells.
+ This deallocates the ports if noone else is still using them. */
+ _hurd_port_set (&fd->ctty, MACH_PORT_NULL);
+ _hurd_port_locked_set (&fd->port, MACH_PORT_NULL);
+ err = 0;
+ }
+
+ HURD_CRITICAL_END;
+
+ return err;
+}