1 files changed, 67 insertions, 0 deletions
diff --git a/include/libc/libc_fdset.h b/include/libc/libc_fdset.h
new file mode 100644
index 0000000000..0056d61cc5
--- /dev/null
+++ b/include/libc/libc_fdset.h
@@ -0,0 +1,67 @@
+/*
+ * File      : libc_errno.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2017, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-10-30     Bernard      The first version
+ */
+
+#ifndef LIBC_FDSET_H__
+#define LIBC_FDSET_H__
+
+#include <rtconfig.h>
+
+#ifdef RT_USING_NEWLIB
+#include <sys/types.h>
+#else
+
+#ifdef RT_USING_DFS_NET
+
+#ifdef FD_SETSIZE
+#undef FD_SETSIZE
+#endif
+
+#define FD_SETSIZE      DFS_FD_MAX
+#endif
+
+#  define	NBBY	8		/* number of bits in a byte */
+
+typedef	long	fd_mask;
+#  define	NFDBITS	(sizeof (fd_mask) * NBBY)	/* bits per mask */
+#  ifndef	howmany
+#	define	howmany(x,y)	(((x)+((y)-1))/(y))
+#  endif
+
+/* We use a macro for fd_set so that including Sockets.h afterwards
+   can work.  */
+typedef	struct _types_fd_set {
+	fd_mask	fds_bits[howmany(FD_SETSIZE, NFDBITS)];
+} _types_fd_set;
+
+#define fd_set _types_fd_set
+
+#  define	FD_SET(n, p)	((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS)))
+#  define	FD_CLR(n, p)	((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS)))
+#  define	FD_ISSET(n, p)	((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS)))
+#  define   FD_ZERO(p)      memset((void*)(p), 0, sizeof(*(p)))
+
+#endif
+
+#endif
+