From f3bc36589bd2e7655072fcd72c0d62c38e652b83 Mon Sep 17 00:00:00 2001
From: Yehuda Sadeh <yehuda@redhat.com>
Date: Wed, 2 Mar 2016 22:25:15 -0800
Subject: [PATCH] common/ceph_time: add real_clock::is_zero()

to check whether time is not zero

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>
Signed-off-by: Matt Benjamin <mbenjamin@redhat.com>
---
 src/common/ceph_time.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/common/ceph_time.h b/src/common/ceph_time.h
index f0e188f97da4d..ef187c0a83f4b 100644
--- a/src/common/ceph_time.h
+++ b/src/common/ceph_time.h
@@ -75,6 +75,10 @@ namespace ceph {
       // introducing configurable clock skew.
       static time_point now(const CephContext* cct) noexcept;
 
+      static bool is_zero(const time_point& t) {
+        return (t == time_point::min());
+      }
+
       // Allow conversion to/from any clock with the same interface as
       // std::chrono::system_clock)
       template<typename Clock, typename Duration>
-- 
2.39.5