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/*
* $RCSfile$
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*
* $Revision$
* $Date$
* $State$
*/
/*
* Portions of this code were derived from work done by the Blackdown
* group (www.blackdown.org), who did the initial Linux implementation
* of the Java 3D API.
*/
#include "com_sun_j3d_utils_timer_J3DTimer.h"
#define NSEC_PER_SEC ((jlong)1000000000)
#ifdef __linux__
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#endif
#ifdef SOLARIS
#include <time.h>
#include <sys/systeminfo.h>
#include <string.h>
#ifndef CLOCK_HIGHRES
#define CLOCK_HIGHRES 4 /* Solaris 7 does not define this */
#endif /* constant. When run on Solaris 7 */
#endif /* CLOCK_HIGHRES is not used. */
#ifdef WIN32
#include <Windows.h>
#include <math.h>
static double timerScale = -1.0;
#endif
/*
* Class: com_sun_j3d_utils_timer_J3DTimer
* Method: getNativeTimer
* Signature: ()J
*/
JNIEXPORT jlong JNICALL
Java_com_sun_j3d_utils_timer_J3DTimer_getNativeTimer(JNIEnv *env,
jclass clazz)
{
jlong timerNsec;
#ifdef SOLARIS
/*
struct timespec tp;
clock_gettime( CLOCK_HIGHRES, &tp );
return (jlong)tp.tv_nsec + (jlong)tp.tv_sec * NSEC_PER_SEC;
*/
timerNsec = (jlong)gethrtime();
#endif /* SOLARIS */
#ifdef WIN32
LARGE_INTEGER time;
LARGE_INTEGER freq;
if (timerScale < 0.0) {
QueryPerformanceFrequency( &freq );
if (freq.QuadPart <= 0) {
timerScale = 0.0;
}
else {
timerScale = (double) NSEC_PER_SEC / (double)freq.QuadPart;
}
}
QueryPerformanceCounter(&time);
timerNsec = (jlong)((double)time.QuadPart * timerScale);
#endif /* WIN32 */
#ifdef __linux__
struct timeval t;
gettimeofday(&t, 0);
timerNsec = ((jlong)t.tv_sec) * NSEC_PER_SEC + ((jlong)t.tv_usec) * ((jlong)1000);
#endif /* __linux__ */
return timerNsec;
}
/*
* Class: com_sun_j3d_utils_timer_J3DTimer
* Method: getNativeTimerResolution
* Signature: ()J
*/
JNIEXPORT jlong JNICALL
Java_com_sun_j3d_utils_timer_J3DTimer_getNativeTimerResolution(JNIEnv *env,
jclass clazz)
{
jlong res;
#ifdef SOLARIS
char buf[4];
sysinfo( SI_RELEASE, &buf[0], 4 );
if (strcmp( "5.7", &buf[0] )==0) {
/* Hard-coded for Solaris 7, since clock_getres isn't available */
res = (jlong)3;
} else {
struct timespec tp;
clock_getres( CLOCK_HIGHRES, &tp );
res = (jlong)tp.tv_nsec;
}
#endif /* SOLARIS */
#ifdef WIN32
LARGE_INTEGER freq;
QueryPerformanceFrequency( &freq );
if ((jlong)freq.QuadPart <= 0)
res = 0;
else {
res = (NSEC_PER_SEC + (jlong)freq.QuadPart - 1) / ((jlong)freq.QuadPart);
if (res < 1) {
res = 1;
}
}
#endif
#ifdef __linux__
/* Hard-coded at 1 microsecond -- the resolution of gettimeofday */
res = 1000;
#endif /* __linux__ */
return res;
}
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