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61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
/*
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Copyright (c) 2007-2011 iMatix Corporation
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Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_CLOCK_HPP_INCLUDED__
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#define __ZMQ_CLOCK_HPP_INCLUDED__
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#include "stdint.hpp"
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namespace zmq
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{
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class clock_t
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{
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public:
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clock_t ();
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~clock_t ();
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// CPU's timestamp counter. Returns 0 if it's not available.
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static uint64_t rdtsc ();
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// High precision timestamp.
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static uint64_t now_us ();
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// Low precision timestamp. In tight loops generating it can be
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// 10 to 100 times faster than the high precision timestamp.
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uint64_t now_ms ();
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private:
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// TSC timestamp of when last time measurement was made.
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uint64_t last_tsc;
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// Physical time corresponding to the TSC above (in milliseconds).
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uint64_t last_time;
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clock_t (const clock_t&);
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const clock_t &operator = (const clock_t&);
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};
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}
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#endif
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