1 files changed, 178 insertions, 0 deletions
diff --git a/src/test/common/test_time.cc b/src/test/common/test_time.cc
new file mode 100644
index 00000000..c517a610
--- /dev/null
+++ b/src/test/common/test_time.cc
@@ -0,0 +1,178 @@
+
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.	See file COPYING.
+ *
+ */
+
+#include <ctime>
+
+#include "common/ceph_time.h"
+#include "include/rados.h"
+#include "gtest/gtest.h"
+
+
+using ceph::real_clock;
+using ceph::real_time;
+
+using ceph::real_clock;
+using ceph::real_time;
+
+using ceph::coarse_real_clock;
+using ceph::coarse_mono_clock;
+
+using ceph::timespan;
+using ceph::signedspan;
+
+using std::chrono::seconds;
+using std::chrono::microseconds;
+using std::chrono::nanoseconds;
+
+static_assert(!real_clock::is_steady, "ceph::real_clock must not be steady.");
+static_assert(!coarse_real_clock::is_steady,
+	      "ceph::coarse_real_clock must not be steady.");
+
+static_assert(mono_clock::is_steady, "ceph::mono_clock must be steady.");
+static_assert(coarse_mono_clock::is_steady,
+	      "ceph::coarse_mono_clock must be steady.");
+
+// Before this file was written.
+static constexpr uint32_t bs = 1440701569;
+static constexpr uint32_t bns = 123456789;
+static constexpr uint32_t bus = 123456;
+static constexpr time_t btt = bs;
+static constexpr struct timespec bts = { bs, bns };
+static struct ceph_timespec bcts = { init_le32(bs), init_le32(bns) };
+static constexpr struct timeval btv = { bs, bus };
+static constexpr double bd = bs + ((double)bns / 1000000000.);
+
+template<typename Clock>
+static void system_clock_sanity() {
+  static const typename Clock::time_point brt(seconds(bs) + nanoseconds(bns));
+  const typename Clock::time_point now(Clock::now());
+
+  ASSERT_GT(now, brt);
+
+  ASSERT_GT(Clock::to_time_t(now), btt);
+
+  ASSERT_GT(Clock::to_timespec(now).tv_sec, bts.tv_sec);
+  ASSERT_LT(Clock::to_timespec(now).tv_nsec, 1000000000L);
+
+  ASSERT_GT(Clock::to_ceph_timespec(now).tv_sec, bcts.tv_sec);
+  ASSERT_LT(Clock::to_ceph_timespec(now).tv_nsec, 1000000000UL);
+
+  ASSERT_GT(Clock::to_timeval(now).tv_sec, btv.tv_sec);
+  ASSERT_LT(Clock::to_timeval(now).tv_usec, 1000000L);
+}
+
+template<typename Clock>
+static void system_clock_conversions() {
+  static typename Clock::time_point brt(seconds(bs) +
+						  nanoseconds(bns));
+
+  ASSERT_EQ(Clock::to_time_t(brt), btt);
+  ASSERT_EQ(Clock::from_time_t(btt) + nanoseconds(bns), brt);
+
+  {
+    const struct timespec tts = Clock::to_timespec(brt);
+    ASSERT_EQ(tts.tv_sec, bts.tv_sec);
+    ASSERT_EQ(tts.tv_nsec, bts.tv_nsec);
+  }
+  ASSERT_EQ(Clock::from_timespec(bts), brt);
+  {
+    struct timespec tts;
+    Clock::to_timespec(brt, tts);
+    ASSERT_EQ(tts.tv_sec, bts.tv_sec);
+    ASSERT_EQ(tts.tv_nsec, bts.tv_nsec);
+  }
+
+  {
+    const struct ceph_timespec tcts = Clock::to_ceph_timespec(brt);
+    ASSERT_EQ(tcts.tv_sec, bcts.tv_sec);
+    ASSERT_EQ(tcts.tv_nsec, bcts.tv_nsec);
+  }
+  ASSERT_EQ(Clock::from_ceph_timespec(bcts), brt);
+  {
+    struct ceph_timespec tcts;
+    Clock::to_ceph_timespec(brt, tcts);
+    ASSERT_EQ(tcts.tv_sec, bcts.tv_sec);
+    ASSERT_EQ(tcts.tv_nsec, bcts.tv_nsec);
+  }
+
+  {
+    const struct timeval ttv = Clock::to_timeval(brt);
+    ASSERT_EQ(ttv.tv_sec, btv.tv_sec);
+    ASSERT_EQ(ttv.tv_usec, btv.tv_usec);
+  }
+  ASSERT_EQ(Clock::from_timeval(btv), brt - nanoseconds(bns - bus * 1000));
+  {
+    struct timeval ttv;
+    Clock::to_timeval(brt, ttv);
+    ASSERT_EQ(ttv.tv_sec, btv.tv_sec);
+    ASSERT_EQ(ttv.tv_usec, btv.tv_usec);
+  }
+
+  ASSERT_EQ(Clock::to_double(brt), bd);
+  // Fudge factor
+  ASSERT_LT(std::abs((Clock::from_double(bd) - brt).count()), 30);
+}
+
+TEST(RealClock, Sanity) {
+  system_clock_sanity<real_clock>();
+}
+
+
+TEST(RealClock, Conversions) {
+  system_clock_conversions<real_clock>();
+}
+
+TEST(CoarseRealClock, Sanity) {
+  system_clock_sanity<coarse_real_clock>();
+}
+
+
+TEST(CoarseRealClock, Conversions) {
+  system_clock_conversions<coarse_real_clock>();
+}
+
+TEST(TimePoints, SignedSubtraciton) {
+  ceph::real_time rta(std::chrono::seconds(3));
+  ceph::real_time rtb(std::chrono::seconds(5));
+
+  ceph::coarse_real_time crta(std::chrono::seconds(3));
+  ceph::coarse_real_time crtb(std::chrono::seconds(5));
+
+  ceph::mono_time mta(std::chrono::seconds(3));
+  ceph::mono_time mtb(std::chrono::seconds(5));
+
+  ceph::coarse_mono_time cmta(std::chrono::seconds(3));
+  ceph::coarse_mono_time cmtb(std::chrono::seconds(5));
+
+  ASSERT_LT(rta - rtb, ceph::signedspan::zero());
+  ASSERT_LT((rta - rtb).count(), 0);
+  ASSERT_GT(rtb - rta, ceph::signedspan::zero());
+  ASSERT_GT((rtb - rta).count(), 0);
+
+  ASSERT_LT(crta - crtb, ceph::signedspan::zero());
+  ASSERT_LT((crta - crtb).count(), 0);
+  ASSERT_GT(crtb - crta, ceph::signedspan::zero());
+  ASSERT_GT((crtb - crta).count(), 0);
+
+  ASSERT_LT(mta - mtb, ceph::signedspan::zero());
+  ASSERT_LT((mta - mtb).count(), 0);
+  ASSERT_GT(mtb - mta, ceph::signedspan::zero());
+  ASSERT_GT((mtb - mta).count(), 0);
+
+  ASSERT_LT(cmta - cmtb, ceph::signedspan::zero());
+  ASSERT_LT((cmta - cmtb).count(), 0);
+  ASSERT_GT(cmtb - cmta, ceph::signedspan::zero());
+  ASSERT_GT((cmtb - cmta).count(), 0);
+}