From 597cc5edd624525563e6549dc0057eca2a51c81d Mon Sep 17 00:00:00 2001 From: Micah Anderson Date: Tue, 11 Nov 2014 13:30:46 -0500 Subject: upgrade to new version --- src/clock.hpp | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 src/clock.hpp (limited to 'src/clock.hpp') diff --git a/src/clock.hpp b/src/clock.hpp new file mode 100644 index 0000000..e0d0fb1 --- /dev/null +++ b/src/clock.hpp @@ -0,0 +1,59 @@ +/* + Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + 0MQ is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see . +*/ + +#ifndef __ZMQ_CLOCK_HPP_INCLUDED__ +#define __ZMQ_CLOCK_HPP_INCLUDED__ + +#include "stdint.hpp" + +namespace zmq +{ + + class clock_t + { + public: + + clock_t (); + ~clock_t (); + + // CPU's timestamp counter. Returns 0 if it's not available. + static uint64_t rdtsc (); + + // High precision timestamp. + static uint64_t now_us (); + + // Low precision timestamp. In tight loops generating it can be + // 10 to 100 times faster than the high precision timestamp. + uint64_t now_ms (); + + private: + + // TSC timestamp of when last time measurement was made. + uint64_t last_tsc; + + // Physical time corresponding to the TSC above (in milliseconds). + uint64_t last_time; + + clock_t (const clock_t&); + const clock_t &operator = (const clock_t&); + }; + +} + +#endif -- cgit v1.2.3