/*
 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
#include <jni.h>
#include <stdio.h>
#include <time.h>
#include "jni_tools.h"

static jfieldID objFieldId = NULL;

/*
 * Class:     nsk_share_gc_lock_jni_LongArrayCriticalLocker
 * Method:    criticalNative
 * Signature: ([Z)Z
 */
JNIEXPORT jlong JNICALL Java_nsk_share_gc_lock_jni_LongArrayCriticalLocker_criticalNative
(JNIEnv *env, jobject this, jlong enterTime, jlong sleepTime) {
        jsize size, i;
        jlongArray arr;
        jlong *pa;
        jlong hash = 0;
        time_t start_time, current_time;

        if (objFieldId == NULL) {
                jclass class = (*env)->GetObjectClass(env, this);
                if (class == NULL) {
                        printf("Error: GetObjectClass returned NULL\n");
                        return 0;
                }
                objFieldId = (*env)->GetFieldID(env, class, "obj", "Ljava/lang/Object;");
                if (objFieldId == NULL) {
                        printf("Error: GetFieldID returned NULL\n");
                        return 0;
                }
        }
        arr = (*env)->GetObjectField(env, this, objFieldId);
        if (arr == NULL) {
                printf("Error: GetObjectField returned NULL\n");
                return JNI_FALSE;
        }
        (*env)->SetObjectField(env, this, objFieldId, NULL);
        size = (*env)->GetArrayLength(env, arr);
        start_time = time(NULL);
        enterTime /= 1000;
        current_time = 0;
        while (current_time - start_time < enterTime) {
                pa = (*env)->GetPrimitiveArrayCritical(env, arr, NULL);
                if (pa != NULL) {
                        for (i = 0; i < size; ++i)
                                hash ^= pa[i];
                } else {
                        hash = 0;
                }
                mssleep((long) sleepTime);
                (*env)->ReleasePrimitiveArrayCritical(env, arr, pa, 0);
                mssleep((long) sleepTime);
                current_time = time(NULL);
        }
        (*env)->SetObjectField(env, this, objFieldId, arr);
        return hash;
}