mirror of
https://github.com/TelegramMessenger/MTProxy.git
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84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
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This file is part of Mtproto-proxy Library.
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Mtproto-proxy Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser 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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Mtproto-proxy Library 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 Mtproto-proxy Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2014 Telegram Messenger Inc
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2014 Anton Maydell
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*/
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#include <assert.h>
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#include <sys/time.h>
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#include <time.h>
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/* unistd.h defines _POSIX_TIMERS */
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#include <unistd.h>
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#include "precise-time.h"
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__thread int now;
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__thread double precise_now;
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__thread long long precise_now_rdtsc;
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long long precise_time;
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long long precise_time_rdtsc;
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double get_utime_monotonic (void) __attribute__ ((weak));
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double get_utime_monotonic (void) {
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struct timespec T;
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#if _POSIX_TIMERS
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assert (clock_gettime (CLOCK_MONOTONIC, &T) >= 0);
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precise_now_rdtsc = rdtsc ();
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return precise_now = T.tv_sec + (double) T.tv_nsec * 1e-9;
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#else
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#error "No high-precision clock"
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return precise_now = time ();
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#endif
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}
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double get_double_time (void) {
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static double last_double_time = -1;
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static long long next_rdtsc;
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long long cur_rdtsc = rdtsc ();
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if (cur_rdtsc > next_rdtsc) {
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struct timeval tv;
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gettimeofday (&tv, NULL);
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next_rdtsc = cur_rdtsc + 1000000;
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return (last_double_time = tv.tv_sec + 1e-6 * tv.tv_usec);
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} else {
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return last_double_time;
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}
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}
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double get_utime (int clock_id) {
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struct timespec T;
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#if _POSIX_TIMERS
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assert (clock_gettime (clock_id, &T) >= 0);
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double res = T.tv_sec + (double) T.tv_nsec * 1e-9;
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#else
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#error "No high-precision clock"
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double res = time ();
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#endif
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if (clock_id == CLOCK_REALTIME) {
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precise_time = (long long) (res * (1LL << 32));
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precise_time_rdtsc = rdtsc ();
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}
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return res;
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}
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long long get_precise_time (unsigned precision) {
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unsigned long long diff = rdtsc() - precise_time_rdtsc;
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if (diff > precision) {
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get_utime (CLOCK_REALTIME);
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}
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return precise_time;
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}
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