From e7fb6df203f83fd5dd22a6306613005211408d44 Mon Sep 17 00:00:00 2001
From: fslongjin <fslongjin@vip.qq.com>
Date: Mon, 18 Jul 2022 21:19:45 +0800
Subject: [PATCH] =?UTF-8?q?=E5=86=85=E6=A0=B8=E6=80=81usleep?=
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---
 kernel/common/time.h |  8 ++++++++
 kernel/time/sleep.c  | 18 +++++++++++++++++-
 kernel/time/sleep.h  |  7 +++++++
 3 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/kernel/common/time.h b/kernel/common/time.h
index d6fdaeb8..a7b0ae89 100644
--- a/kernel/common/time.h
+++ b/kernel/common/time.h
@@ -37,6 +37,14 @@ struct timespec
  */
 extern int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
 
+/**
+ * @brief 睡眠指定时间
+ *
+ * @param usec 微秒
+ * @return int
+ */
+extern int usleep(useconds_t usec);
+
 /**
  * @brief 获取当前的CPU时间
  * 
diff --git a/kernel/time/sleep.c b/kernel/time/sleep.c
index 90df0353..6646c205 100644
--- a/kernel/time/sleep.c
+++ b/kernel/time/sleep.c
@@ -59,4 +59,20 @@ int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
     }
 
     return 0;
-}
\ No newline at end of file
+}
+
+/**
+ * @brief 睡眠指定时间
+ *
+ * @param usec 微秒
+ * @return int
+ */
+int usleep(useconds_t usec)
+{
+    struct timespec ts = {
+        tv_sec : (long int)(usec / 1000000),
+        tv_nsec : (long int)(usec % 1000000) * 1000UL
+    };
+
+    return nanosleep(&ts, NULL);
+}
diff --git a/kernel/time/sleep.h b/kernel/time/sleep.h
index a256222c..986e9628 100644
--- a/kernel/time/sleep.h
+++ b/kernel/time/sleep.h
@@ -14,3 +14,10 @@
  */
 int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
 
+/**
+ * @brief 睡眠指定时间
+ *
+ * @param usec 微秒
+ * @return int
+ */
+int usleep(useconds_t usec);
\ No newline at end of file