2 files changed, 52 insertions, 3 deletions
diff --git a/components/libc/compilers/common/poll.h b/components/libc/compilers/common/poll.h
new file mode 100644
index 0000000000..aea73d6eaf
--- /dev/null
+++ b/components/libc/compilers/common/poll.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-09-11     Meco Man     First version
+ */
+#ifndef __POLL_H__
+#define __POLL_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(POLLIN) && !defined(POLLOUT)
+#define POLLIN          (0x01)
+#define POLLRDNORM      (0x01)
+#define POLLRDBAND      (0x01)
+#define POLLPRI         (0x01)
+
+#define POLLOUT         (0x02)
+#define POLLWRNORM      (0x02)
+#define POLLWRBAND      (0x02)
+
+#define POLLERR         (0x04)
+#define POLLHUP         (0x08)
+#define POLLNVAL        (0x10)
+
+typedef unsigned int nfds_t;
+
+struct pollfd
+{
+    int fd;
+    short events;
+    short revents;
+};
+#endif /* !defined(POLLIN) && !defined(POLLOUT) */
+
+#define POLLMASK_DEFAULT (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)
+
+int poll(struct pollfd *fds, nfds_t nfds, int timeout);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __POLL_H__ */
diff --git a/components/libc/compilers/common/sys/time.h b/components/libc/compilers/common/sys/time.h
index c2320429e0..9d4422e17a 100644
--- a/components/libc/compilers/common/sys/time.h
+++ b/components/libc/compilers/common/sys/time.h
@@ -8,8 +8,8 @@
  * 2020-09-07     Meco Man     combine gcc armcc iccarm
  * 2021-02-12     Meco Man     move all definitions located in <clock_time.h> to this file
  */
-#ifndef _SYS_TIME_H_
-#define _SYS_TIME_H_
+#ifndef __SYS_TIME_H__
+#define __SYS_TIME_H__
 
 #include <rtconfig.h>
 #include <rtdef.h>
@@ -73,7 +73,7 @@ struct timespec {
 };
 #endif
 
-/* posix clock and timer */
+/* POSIX clock and timer */
 #define MILLISECOND_PER_SECOND  1000UL
 #define MICROSECOND_PER_SECOND  1000000UL
 #define NANOSECOND_PER_SECOND   1000000000UL