添加rtthread相关代码

riscv/rtthread/components/drivers/include/ipc/poll.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2016-09-19     Heyuanjie    The first version.
+ * 2016-12-26     Bernard      Update poll interface
+ */
+#ifndef IPC_POLL_H__
+#define IPC_POLL_H__
+
+#include <rtdef.h>
+#include <rtconfig.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct rt_pollreq;
+typedef void (*poll_queue_proc)(rt_wqueue_t *, struct rt_pollreq *);
+
+typedef struct rt_pollreq
+{
+    poll_queue_proc _proc;
+    short _key;
+} rt_pollreq_t;
+
+rt_inline void rt_poll_add(rt_wqueue_t *wq, rt_pollreq_t *req)
+{
+    if (req && req->_proc && wq)
+    {
+        req->_proc(wq, req);
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif