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Timers.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common
 * Development and Distribution License("CDDL") (collectively, the
 * "License"). You may not use this file except in compliance with the
 * License. You can obtain a copy of the License at
 * http://www.netbeans.org/cddl-gplv2.html
 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
 * specific language governing permissions and limitations under the
 * License.  When distributing the software, include this License Header
 * Notice in each file and include the License file at
 * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the GPL Version 2 section of the License file that
 * accompanied this code. If applicable, add the following below the
 * License Header, with the fields enclosed by brackets [] replaced by
 * your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * Contributor(s):
 *
 * The Original Software is NetBeans. The Initial Developer of the Original
 * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
 * Microsystems, Inc. All Rights Reserved.
 *
 * If you wish your version of this file to be governed by only the CDDL
 * or only the GPL Version 2, indicate your decision by adding
 * "[Contributor] elects to include this software in this distribution
 * under the [CDDL or GPL Version 2] license." If you do not indicate a
 * single choice of license, a recipient has the option to distribute
 * your version of this file under either the CDDL, the GPL Version 2 or
 * to extend the choice of license to its licensees as provided above.
 * However, if you add GPL Version 2 code and therefore, elected the GPL
 * Version 2 license, then the option applies only if the new code is
 * made subject to such option by the copyright holder.
 */
/*
 * author Tomas Hurka
 *        Ian Formanek
 *        Misha Dmitriev
 */

#ifdef WIN32
#include <Windows.h>
#else
#include <sys/time.h>
#include <fcntl.h>
#include <time.h>
#endif

#ifdef SOLARIS
#define _STRUCTURED_PROC 1
#include <sys/procfs.h>
#include <unistd.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

#include "jni.h"
#include "jvmti.h"

#include "org_netbeans_lib_profiler_server_system_Timers.h"

#include "common_functions.h"

/*
 * Class:     org_netbeans_lib_profiler_server_system_Timers
 * Method:    getThreadCPUTimeInNanos
 * Signature: ()J
 */
JNIEXPORT jlong JNICALL Java_org_netbeans_lib_profiler_server_system_Timers_getThreadCPUTimeInNanos
  (JNIEnv *env, jclass clz)
{   
      jlong threadTime;
      jvmtiError res;
      
      res = (*_jvmti)->GetCurrentThreadCpuTime(_jvmti,&threadTime);
      if (res != JVMTI_ERROR_NONE) fprintf(stderr, "Profiler Agent Error: GetCurrentThreadCpuTime failed with %d\n",res);
      assert(res == JVMTI_ERROR_NONE);
      return threadTime;
}


/*
 * Class:     org_netbeans_lib_profiler_server_system_Timers
 * Method:    osSleep
 * Signature: (I)V
 */
JNIEXPORT void JNICALL Java_org_netbeans_lib_profiler_server_system_Timers_osSleep
  (JNIEnv *env, jclass clz, jint ns)
{
#ifndef WIN32
    struct timespec rqtp;
    rqtp.tv_sec = 0;
    rqtp.tv_nsec = ns;
    nanosleep(&rqtp, NULL);
#endif
}


/*
 * Class:     org_netbeans_lib_profiler_server_system_Timers
 * Method:    enableMicrostateAccounting
 * Signature: (Z)V
 */
JNIEXPORT void JNICALL Java_org_netbeans_lib_profiler_server_system_Timers_enableMicrostateAccounting
  (JNIEnv *env, jclass clz, jboolean enable)
{
#ifdef SOLARIS
    int ctlfd;
    long ctl[2];
    char procname[1024];

    sprintf(procname, "/proc/%d/ctl", getpid());
    ctlfd = open(procname, O_WRONLY);
    if (ctlfd < 0) {
        /*fprintf(stderr, "open %s failed, errno = %d\n", procname, errno);*/
        return;
    }

    if (enable) {
        ctl[0] = PCSET;
    } else {
        ctl[0] = PCUNSET;
    }
    ctl[1] = PR_MSACCT;
    if (write(ctlfd, ctl, 2*sizeof(long)) < 0) {
    /*
        fprintf(stderr, "write failed, errno = %d\n", errno);
    */
    }
    close(ctlfd);
#endif
}

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