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/*
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* 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.
*/
#include "org_jau_sys_Clock.h"
#include <cstdint>
#include <cinttypes>
#include <time.h>
#include <jau/environment.hpp>
#include "jau/jni/helper_jni.hpp"
static const int64_t NanoPerMilli = 1000000L;
static const int64_t MilliPerOne = 1000L;
/**
* See <http://man7.org/linux/man-pages/man2/clock_gettime.2.html>
* <p>
* Regarding avoiding kernel via VDSO,
* see <http://man7.org/linux/man-pages/man7/vdso.7.html>,
* clock_gettime seems to be well supported at least on kernel >= 4.4.
* Only bfin and sh are missing, while ia64 seems to be complicated.
*/
jlong Java_org_jau_sys_Clock_currentTimeMillis(JNIEnv *env, jclass clazz) {
(void)env;
(void)clazz;
struct timespec t;
clock_gettime(CLOCK_MONOTONIC, &t);
int64_t res = t.tv_sec * MilliPerOne + t.tv_nsec / NanoPerMilli;
return (jlong)res;
}
jlong Java_org_jau_sys_Clock_startupTimeMillisImpl(JNIEnv *env, jclass clazz) {
(void)env;
(void)clazz;
return jau::environment::startupTimeMilliseconds;
}
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