| /* |
| Copyright (c) 2012 Martin Sustrik All rights reserved. |
| Copyright 2015 Garrett D'Amore <garrett@damore.org> |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), |
| to deal in the Software without restriction, including without limitation |
| the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| and/or sell copies of the Software, and to permit persons to whom |
| the Software is furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included |
| in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| IN THE SOFTWARE. |
| */ |
| |
| #ifndef NN_STOPWATCH_INCLUDED |
| #define NN_STOPWATCH_INCLUDED |
| |
| #include <stdint.h> |
| |
| #include "err.h" |
| |
| /* Check whether measured time is the expected time (in microseconds). |
| The upper tolerance is 50ms so that the test doesn't fail even on |
| very slow or very loaded systems. Likewise on some systems we can |
| wind up firing up to a single tick early (Windows), so the lower bound |
| is pretty low. The consequence of this is that programs which specify |
| a timeout should be a little more pessimistic (at least 10ms) then they |
| might otherwise think they need to be. */ |
| #define time_assert(actual,expected) \ |
| nn_assert (actual > ((expected) - 10000) && actual < ((expected) + 50000)); |
| |
| /* Measures time interval in microseconds. */ |
| |
| struct nn_stopwatch { |
| uint64_t start; |
| }; |
| |
| void nn_stopwatch_init (struct nn_stopwatch *self); |
| uint64_t nn_stopwatch_term (struct nn_stopwatch *self); |
| |
| #endif |