From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
mingo@kernel.org, jiangshanlai@gmail.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
Mark Brown <broonie@kernel.org>, Willy Tarreau <w@1wt.eu>,
"Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH nolibc 2/2] tools/nolibc: Implement msleep()
Date: Wed, 21 Jul 2021 13:36:19 -0700 [thread overview]
Message-ID: <20210721203619.3373350-2-paulmck@kernel.org> (raw)
In-Reply-To: <20210721203600.GA3360826@paulmck-ThinkPad-P17-Gen-1>
From: Mark Brown <broonie@kernel.org>
Allow users to implement shorter delays than a full second by implementing
msleep().
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
tools/include/nolibc/nolibc.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index 13c194aeaf3f0..3430667b0d241 100644
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -2243,6 +2243,19 @@ unsigned int sleep(unsigned int seconds)
return 0;
}
+static __attribute__((unused))
+int msleep(unsigned int msecs)
+{
+ struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 };
+
+ if (sys_select(0, 0, 0, 0, &my_timeval) < 0)
+ return (my_timeval.tv_sec * 1000) +
+ (my_timeval.tv_usec / 1000) +
+ !!(my_timeval.tv_usec % 1000);
+ else
+ return 0;
+}
+
static __attribute__((unused))
int stat(const char *path, struct stat *buf)
{
--
2.31.1.189.g2e36527f23
prev parent reply other threads:[~2021-07-21 20:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 20:36 [PATCH nolibc 0/2] nolibc commits for v5.15 Paul E. McKenney
2021-07-21 20:36 ` [PATCH nolibc 1/2] tools: include: nolibc: Fix a typo occured to occurred in the file nolibc.h Paul E. McKenney
2021-07-21 20:36 ` Paul E. McKenney [this message]
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