65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
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Copyright (C) 2014-2018, Johannes Pekkilae, Miikka Vaeisalae.
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This file is part of Astaroth.
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Astaroth is free software: you can redistribute it and/or modify
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it under the terms of the GNU 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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Astaroth 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Astaroth. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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@file
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\brief High-resolution timer.
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Usage:
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Timer t;
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timer_reset(&t);
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timer_diff_nsec(t);
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If there are issues, try compiling with -std=gnu11 -lrt
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*/
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#pragma once
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#include <stdio.h> // perror
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#include <time.h>
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typedef struct timespec Timer;
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// Contains at least the following members:
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// time_t tv_sec;
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// long tv_nsec;
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static inline int
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timer_reset(Timer* t)
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{
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const int retval = clock_gettime(CLOCK_REALTIME, t);
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if (retval == -1)
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perror("clock_gettime failure");
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return retval;
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}
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static inline long
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timer_diff_nsec(const Timer start)
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{
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Timer end;
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timer_reset(&end);
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const long diff = (end.tv_sec - start.tv_sec) * 1000000000l +
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(end.tv_nsec - start.tv_nsec);
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return diff;
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}
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static inline void
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timer_diff_print(const Timer t)
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{
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printf("Time elapsed: %g ms\n", timer_diff_nsec(t) / 1e6);
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}
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