First commit XiUOS

kernel/include/xs_poll.h

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+/*
+* Copyright (c) 2020 AIIT XUOS Lab
+* XiUOS is licensed under Mulan PSL v2.
+* You can use this software according to the terms and conditions of the Mulan PSL v2.
+* You may obtain a copy of Mulan PSL v2 at:
+*        http://license.coscl.org.cn/MulanPSL2
+* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+* See the Mulan PSL v2 for more details.
+*/
+
+/**
+* @file:    xs_pool.h
+* @brief:   function declaration and structure defintion of poll
+* @version: 1.0
+* @author:  AIIT XUOS Lab
+* @date:    2020/4/20
+*
+*/
+
+#ifndef XS_POLL_H
+#define XS_POLL_H
+
+#include <xs_base.h>
+#include <xs_waitqueue.h>
+#include <sys/time.h> 
+
+#if !defined(POLLIN) && !defined(POLLOUT)
+
+#define POLLIN                   0x001
+#define POLLOUT                  0x002
+#define POLLERR                  0x004
+#define POLLHUP                  0x008
+#define POLLNVAL                 0x010
+
+#define POLLMASK_DEFAULT (POLLIN | POLLOUT )
+
+typedef unsigned long NfdsType;
+
+struct pollfd
+{
+    int   fd;
+    short events;
+    short revents;
+};
+#endif 
+struct Pollreq;
+typedef void (*poll_queue_proc)(WaitQueueType *, struct Pollreq *);
+typedef struct Pollreq
+{
+    poll_queue_proc _proc;
+    short _key;
+} pollreqType;
+
+void PollAdd(WaitQueueType *wq, pollreqType *req);
+int poll(struct pollfd *fds, NfdsType nfds, int timeout);
+
+#endif