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52 lines
1.8 KiB
52 lines
1.8 KiB
9 years ago
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/*
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Copyright (c) 2012 Martin Sustrik All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom
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the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#ifndef NN_CLOCK_INCLUDED
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#define NN_CLOCK_INCLUDED
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#include "int.h"
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/* Optimised retrieval of the current time. The clock object is not
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thread-safe. */
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struct nn_clock
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{
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uint64_t last_tsc;
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uint64_t last_time;
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};
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/* Initialise the clock object. */
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void nn_clock_init (struct nn_clock *self);
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/* Terminate the clock object. */
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void nn_clock_term (struct nn_clock *self);
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/* Returns current time in milliseconds. */
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uint64_t nn_clock_now (struct nn_clock *self);
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/* Returns an unique timestamp. If the system doesn't support producing
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timestamps the return value is zero. */
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uint64_t nn_clock_timestamp ();
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#endif
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