LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Dave Young <hidave.darkstar@gmail.com>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH v2] add time_now_after and other macros which compare with jiffies
Date: Sat, 8 Mar 2008 07:35:06 +0800	[thread overview]
Message-ID: <200803080735.06984.hidave.darkstar@gmail.com> (raw)

Changes from previous version:
1. Add comments
2. Change names easy to understand. For example, now time_now_after(a) means time now after a will return true.

---
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>

---
include/linux/jiffies.h |   16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff -upr linux/include/linux/jiffies.h linux.new/include/linux/jiffies.h
--- linux/include/linux/jiffies.h	2008-03-07 19:56:02.000000000 +0800
+++ linux.new/include/linux/jiffies.h	2008-03-07 20:10:25.000000000 +0800
@@ -135,6 +135,22 @@ static inline u64 get_jiffies_64(void)
 #define time_before_eq64(a,b)	time_after_eq64(b,a)
 
 /*
+ * These four macros compare jiffies and 'a' for convenience.
+ */
+
+/* time_now_after(a) return true if now (jiffies) is after a */
+#define time_now_after(a) time_after(jiffies, a)
+
+/* time_now_before(a) return true if now (jiffies) is before a */
+#define time_now_before(a) time_before(jiffies, a)
+
+/* time_now_after_eq(a) return true if now (jiffies) is after or equal to a */
+#define time_now_after_eq(a) time_after_eq(jiffies, a)
+
+/* time_now_before_eq(a) return true if now (jiffies) is before or equal to a */
+#define time_now_before_eq(a) time_before_eq(jiffies, a)
+
+/*
  * Have the 32 bit jiffies value wrap 5 minutes after boot
  * so jiffies wrap bugs show up earlier.
  */

             reply	other threads:[~2008-03-07 23:42 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-07 23:35 Dave Young [this message]
2008-03-08 16:12 ` Johannes Weiner
2008-03-09  0:54   ` Dave Young
2008-03-09  9:58     ` Alan Cox
2008-03-09 10:44       ` Dave Young
2008-03-09 11:08         ` Alan Cox
2008-03-09 19:01           ` Andrew Morton
2008-03-09 20:06             ` Alan Cox
2008-03-10  2:03             ` Dave Young
2008-03-10  2:41               ` Johannes Weiner
2008-03-09 18:36       ` Andrew Morton
2008-03-09 20:03         ` Alan Cox

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200803080735.06984.hidave.darkstar@gmail.com \
    --to=hidave.darkstar@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --subject='Re: [PATCH v2] add time_now_after and other macros which compare with jiffies' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).