libcxx/test/std/time/time.clock/time.clock.steady/now.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // UNSUPPORTED: no-monotonic-clock
  10
  11 // <chrono>
  12
  13 // steady_clock
  14
  15 // static time_point now();
  16
  17 #include <chrono>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21
  22 int main(int, char**)
  23 {
  24     typedef std::chrono::steady_clock C;
  25     C::time_point t1 = C::now();
  26     C::time_point t2 = C::now();
  27     assert(t2 >= t1);
  28     // make sure t2 didn't wrap around
  29     assert(t2 > std::chrono::time_point<C>());
  30
  31   return 0;
  32 }