From f6c80084f73d111a099565ff6cfb1bc23b7e7ae5 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Wed, 4 Apr 2012 01:07:55 +0200
Subject: [PATCH] PEP 418: Add definitions of "monotonic" and "steady"

---
 pep-0418.txt | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/pep-0418.txt b/pep-0418.txt
index a8a852077..3c7fed5ec 100644
--- a/pep-0418.txt
+++ b/pep-0418.txt
@@ -219,6 +219,27 @@ Return a dictionary with the following keys:
      daemon)
 
 
+Definitions
+===========
+
+Monotonic
+---------
+
+A monotonic clock cannot go backward. It may give the same value for two close
+reads depending on the clock resolution.
+
+On Linux, CLOCK_MONOTONIC is a monotonic clock but its rate is adjusted by NTP.
+
+Steady
+------
+
+A steady clock is a clock with a stable rate.
+
+The C++ Timeout Specifiction uses the following definition: "Objects of class
+steady_clock represent clocks for which values of time_point advance at a
+steady rate relative to real time. That is, the clock may not be adjusted."
+
+
 Hardware clocks
 ===============