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/*
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020-2023 Gothel Software e.K.
* Copyright (c) 2020-2023 JogAmp Community.
* 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 <jni.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <gluegen_stdint.h>
#include "com_jogamp_common_os_Clock.h"
// #include <sys/time.h>
#include <time.h>
static const int64_t NanoPerMilli = 1000000L;
static const int64_t MilliPerOne = 1000L;
static const int64_t NanoPerSec = 1000000000L;
static struct timespec startup_t = { .tv_sec = 0, .tv_nsec = 0 };
static void throwNewRuntimeException(JNIEnv *env, const char* msg, ...) {
char buffer[512];
va_list ap;
if( NULL != msg ) {
va_start(ap, msg);
vsnprintf(buffer, sizeof(buffer), msg, ap);
va_end(ap);
fprintf(stderr, "RuntimeException: %s\n", buffer);
if(NULL != env) {
(*env)->ThrowNew(env, (*env)->FindClass(env, "java/lang/RuntimeException"), buffer);
}
}
}
static jboolean throwNewRuntimeExceptionOnException(JNIEnv *env) {
if( (*env)->ExceptionCheck(env) ) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
throwNewRuntimeException(env, "An exception occured from JNI as shown.");
return JNI_TRUE;
} else {
return JNI_FALSE;
}
}
JNIEXPORT void JNICALL
Java_com_jogamp_common_os_Clock_getMonotonicTimeImpl(JNIEnv *env, jclass clazz, jlongArray jval) {
(void)clazz;
// Avoid GetPrimitiveArrayCritical(), which occasionally hangs on system call ::clock_gettime()
struct timespec t = { .tv_sec = 0, .tv_nsec = 0 };
clock_gettime(CLOCK_MONOTONIC, &t);
const jlong val[] = { (jlong)t.tv_sec, (jlong)t.tv_nsec };
(*env)->SetLongArrayRegion(env, jval, 0, 2, val);
}
JNIEXPORT void JNICALL
Java_com_jogamp_common_os_Clock_getWallClockTimeImpl(JNIEnv *env, jclass clazz, jlongArray jval) {
(void)clazz;
// Avoid GetPrimitiveArrayCritical(), which occasionally hangs on system call ::clock_gettime()
struct timespec t = { .tv_sec = 0, .tv_nsec = 0 };
clock_gettime(CLOCK_REALTIME, &t);
const jlong val[] = { (jlong)t.tv_sec, (jlong)t.tv_nsec };
(*env)->SetLongArrayRegion(env, jval, 0, 2, val);
}
JNIEXPORT void JNICALL
Java_com_jogamp_common_os_Clock_getMonotonicStartupTimeImpl(JNIEnv *env, jclass clazz, jlongArray jval) {
(void)clazz;
// Avoid GetPrimitiveArrayCritical(), which occasionally hangs on system call ::clock_gettime()
clock_gettime(CLOCK_MONOTONIC, &startup_t);
const jlong val[] = { (jlong)startup_t.tv_sec, (jlong)startup_t.tv_nsec };
(*env)->SetLongArrayRegion(env, jval, 0, 2, val);
throwNewRuntimeExceptionOnException(env);
}
/**
* 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.
*/
JNIEXPORT jlong JNICALL
Java_com_jogamp_common_os_Clock_currentNanos(JNIEnv *env, jclass clazz) {
(void)env;
(void)clazz;
struct timespec t = { .tv_sec = 0, .tv_nsec = 0 };
clock_gettime(CLOCK_MONOTONIC, &t);
struct timespec d = { .tv_sec = t.tv_sec - startup_t.tv_sec,
.tv_nsec = t.tv_nsec - startup_t.tv_nsec };
if ( 0 > d.tv_nsec ) {
d.tv_nsec += NanoPerSec;
d.tv_sec -= 1;
}
return (jlong) ( (int64_t)d.tv_sec * NanoPerSec + (int64_t)d.tv_nsec );
}
/**
* 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.
*/
JNIEXPORT jlong JNICALL
Java_com_jogamp_common_os_Clock_currentTimeMillis(JNIEnv *env, jclass clazz) {
(void)env;
(void)clazz;
struct timespec t = { .tv_sec = 0, .tv_nsec = 0 };
clock_gettime(CLOCK_MONOTONIC, &t);
int64_t res = (int64_t)t.tv_sec * MilliPerOne +
(int64_t)t.tv_nsec / NanoPerMilli;
return (jlong)res;
}
JNIEXPORT jlong JNICALL
Java_com_jogamp_common_os_Clock_wallClockSeconds(JNIEnv *env, jclass clazz) {
(void)env;
(void)clazz;
struct timespec t = { .tv_sec = 0, .tv_nsec = 0 };
clock_gettime(CLOCK_REALTIME, &t);
return (jlong)( (int64_t)( t.tv_sec ) );
}
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