290 lines
6.6 KiB
C++
290 lines
6.6 KiB
C++
/* Copyright (C) 2014 J.F.Dockes
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef TEST_CHRONO
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#include "autoconfig.h"
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#include "chrono.h"
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#include <time.h>
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#include <iostream>
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using namespace std;
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#ifndef CLOCK_REALTIME
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typedef int clockid_t;
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#define CLOCK_REALTIME 1
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#endif
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#define SECONDS(TS1, TS2) \
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(double((TS2).tv_sec - (TS1).tv_sec) + \
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double((TS2).tv_nsec - (TS1).tv_nsec) * 1e-9)
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#define MILLIS(TS1, TS2) \
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((int64_t)((TS2).tv_sec - (TS1).tv_sec) * 1000LL + \
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((TS2).tv_nsec - (TS1).tv_nsec) / 1000000)
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#define MICROS(TS1, TS2) \
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((int64_t)((TS2).tv_sec - (TS1).tv_sec) * 1000000LL + \
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((TS2).tv_nsec - (TS1).tv_nsec) / 1000)
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#define NANOS(TS1, TS2) \
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((int64_t)((TS2).tv_sec - (TS1).tv_sec) * 1000000000LL + \
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((TS2).tv_nsec - (TS1).tv_nsec))
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// Using clock_gettime() is nice because it gives us ns res and it helps with
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// computing threads work times, but it's also a pita because it forces linking
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// with -lrt. So keep it non-default, special development only.
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// #define USE_CLOCK_GETTIME
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// And wont' bother with gettime() on these.
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#if defined(__APPLE__) || defined(_WIN32)
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#undef USE_CLOCK_GETTIME
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#endif
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#ifdef _MSC_VER
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#define WIN32_LEAN_AND_MEAN
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#include <Windows.h>
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#include <stdint.h> // portable: uint64_t MSVC: __int64
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// MSVC defines this in winsock2.h!?
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typedef struct timeval {
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long tv_sec;
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long tv_usec;
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} timeval;
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int gettimeofday(struct timeval * tp, struct timezone * /*tzp*/)
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{
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// Note: some broken versions only have 8 trailing zero's, the
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// correct epoch has 9 trailing zero's
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static const uint64_t EPOCH = ((uint64_t) 116444736000000000ULL);
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SYSTEMTIME system_time;
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FILETIME file_time;
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uint64_t time;
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GetSystemTime( &system_time );
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SystemTimeToFileTime( &system_time, &file_time );
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time = ((uint64_t)file_time.dwLowDateTime ) ;
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time += ((uint64_t)file_time.dwHighDateTime) << 32;
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tp->tv_sec = (long) ((time - EPOCH) / 10000000L);
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tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
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return 0;
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}
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#else // -> Not _WIN32
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#ifndef USE_CLOCK_GETTIME
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// Using gettimeofday then, needs struct timeval
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#include <sys/time.h>
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#endif
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#endif
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// We use gettimeofday instead of clock_gettime for now and get only
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// uS resolution, because clock_gettime is more configuration trouble
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// than it's worth
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static void gettime(int
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#ifdef USE_CLOCK_GETTIME
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clk_id
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#endif
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, Chrono::TimeSpec *ts)
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{
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#ifdef USE_CLOCK_GETTIME
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struct timespec mts;
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clock_gettime(clk_id, &mts);
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ts->tv_sec = mts.tv_sec;
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ts->tv_nsec = mts.tv_nsec;
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#else
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struct timeval tv;
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gettimeofday(&tv, 0);
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ts->tv_sec = tv.tv_sec;
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ts->tv_nsec = tv.tv_usec * 1000;
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#endif
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}
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///// End system interface
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// Note: this not protected against multithread access and not
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// reentrant, but this is mostly debug code, and it won't crash, just
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// show bad results. Also the frozen thing is not used that much
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Chrono::TimeSpec Chrono::o_now;
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void Chrono::refnow()
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{
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gettime(CLOCK_REALTIME, &o_now);
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}
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Chrono::Chrono()
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{
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restart();
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}
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// Reset and return value before rest in milliseconds
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int64_t Chrono::restart()
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{
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TimeSpec now;
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gettime(CLOCK_REALTIME, &now);
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int64_t ret = MILLIS(m_orig, now);
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m_orig = now;
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return ret;
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}
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int64_t Chrono::urestart()
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{
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TimeSpec now;
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gettime(CLOCK_REALTIME, &now);
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int64_t ret = MICROS(m_orig, now);
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m_orig = now;
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return ret;
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}
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// Get current timer value, milliseconds
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int64_t Chrono::millis(bool frozen)
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{
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if (frozen) {
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return MILLIS(m_orig, o_now);
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} else {
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TimeSpec now;
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gettime(CLOCK_REALTIME, &now);
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return MILLIS(m_orig, now);
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}
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}
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//
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int64_t Chrono::micros(bool frozen)
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{
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if (frozen) {
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return MICROS(m_orig, o_now);
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} else {
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TimeSpec now;
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gettime(CLOCK_REALTIME, &now);
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return MICROS(m_orig, now);
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}
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}
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int64_t Chrono::amicros() const
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{
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TimeSpec ts;
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ts.tv_sec = 0;
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ts.tv_nsec = 0;
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return MICROS(ts, m_orig);
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}
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//
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int64_t Chrono::nanos(bool frozen)
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{
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if (frozen) {
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return NANOS(m_orig, o_now);
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} else {
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TimeSpec now;
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gettime(CLOCK_REALTIME, &now);
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return NANOS(m_orig, now);
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}
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}
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double Chrono::secs(bool frozen)
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{
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if (frozen) {
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return SECONDS(m_orig, o_now);
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} else {
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TimeSpec now;
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gettime(CLOCK_REALTIME, &now);
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return SECONDS(m_orig, now);
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}
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}
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#else
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///////////////////// test driver
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#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <iostream>
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#include "chrono.h"
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using namespace std;
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static char *thisprog;
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static void
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Usage(void)
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{
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fprintf(stderr, "Usage : %s \n", thisprog);
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exit(1);
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}
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Chrono achrono;
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Chrono rchrono;
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void
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showsecs(long msecs)
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{
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fprintf(stderr, "%3.5f S", ((float)msecs) / 1000.0);
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}
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void
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sigint(int sig)
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{
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signal(SIGINT, sigint);
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signal(SIGQUIT, sigint);
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fprintf(stderr, "Absolute interval: ");
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showsecs(achrono.millis());
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fprintf(stderr, ". Relative interval: ");
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showsecs(rchrono.restart());
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cerr << " Abs micros: " << achrono.amicros() <<
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" Relabs micros: " << rchrono.amicros() - 1430477861905884LL
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<< endl;
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fprintf(stderr, ".\n");
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if (sig == SIGQUIT) {
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exit(0);
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}
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}
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int main(int argc, char **argv)
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{
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thisprog = argv[0];
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argc--;
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argv++;
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if (argc != 0) {
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Usage();
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}
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for (int i = 0; i < 50000000; i++);
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cerr << "Start secs: " << achrono.secs() << endl;
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fprintf(stderr, "Type ^C for intermediate result, ^\\ to stop\n");
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signal(SIGINT, sigint);
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signal(SIGQUIT, sigint);
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achrono.restart();
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rchrono.restart();
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while (1) {
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pause();
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}
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}
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#endif /*TEST_CHRONO*/
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