From: Willy Tarreau <w@1wt.eu>
Date: Mon, 7 Feb 2022 16:23:50 +0000 (+0100)
Subject: tools/nolibc/unistd: add usleep()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=180a9797b03472e6881066d9752f2f0d81e1880f;p=linux.git

tools/nolibc/unistd: add usleep()

This call is trivial to implement based on select() to complete sleep()
and msleep(), let's add it.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h
index 87b448ff2191e..1c25e20ee3606 100644
--- a/tools/include/nolibc/unistd.h
+++ b/tools/include/nolibc/unistd.h
@@ -37,6 +37,14 @@ unsigned int sleep(unsigned int seconds)
 		return 0;
 }
 
+static __attribute__((unused))
+int usleep(unsigned int usecs)
+{
+	struct timeval my_timeval = { usecs / 1000000, usecs % 1000000 };
+
+	return sys_select(0, 0, 0, 0, &my_timeval);
+}
+
 static __attribute__((unused))
 int tcsetpgrp(int fd, pid_t pid)
 {