1 /*
   2  * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 #include <jni.h>
  24 #include <stdio.h>
  25 
  26 JNIEXPORT void JNICALL
  27 Java_gc_gctests_nativeGC05_nativeGC05_kickOffRefillers
  28 (JNIEnv *env, jobject obj, jobject matrix, jobject stack) {
  29         jclass matrixClass, stackClass, pairClass = 0;
  30         jmethodID stack_pop_mid, stack_empty_mid, matrix_repopulate_mid, pair_geti_mid, pair_getj_mid;
  31         jobject pair;
  32         jint i, j;
  33         jboolean b;
  34 
  35         /* Get class objects associated with the objects passed in */
  36         matrixClass    = (*env)->GetObjectClass(env, matrix);
  37         stackClass = (*env)->GetObjectClass(env, stack);
  38 
  39         /* GetMethodID's for the pop() and Repopulate() methods */
  40         stack_pop_mid  = (*env)->GetMethodID(env, stackClass, "pop", "()Ljava/lang/Object;");
  41         if (stack_pop_mid == 0) {
  42                 printf("could not get a methodID for Stack::pop()\n");
  43                 return;
  44         }
  45         stack_empty_mid = (*env)->GetMethodID(env, stackClass, "empty", "()Z");
  46         if (stack_empty_mid == 0) {
  47                 printf("could not get a methodID for Stack::empty()\n");
  48                 return;
  49         }
  50 
  51         matrix_repopulate_mid = (*env)->GetMethodID(env, matrixClass, "repopulate", "(II)V");
  52         if (matrix_repopulate_mid == 0) {
  53                 printf("could not get a methodID for Matrix::repopulate(int, int)\n");
  54                 return;
  55         }
  56 
  57         /** b = stack.empty(); */
  58         b = (*env)->CallBooleanMethod(env, stack, stack_empty_mid);
  59         while (b == JNI_FALSE) {
  60                 /** pair = stack.pop() */
  61                 pair = (*env)->CallObjectMethod(env, stack, stack_pop_mid);
  62 
  63                 if (pairClass == 0) {
  64                         pairClass = (*env)->GetObjectClass(env, pair);
  65                         pair_geti_mid = (*env)->GetMethodID(env, pairClass, "getI", "()I");
  66                         if (pair_geti_mid == 0) {
  67                                 printf("could not get a methodID for IndexPair::getI()\n");
  68                                 return;
  69                         }
  70                         pair_getj_mid = (*env)->GetMethodID(env, pairClass, "getJ", "()I");
  71                         if (pair_getj_mid == 0) {
  72                                 printf("could not get a methodID for IndexPair::getJ()\n");
  73                                 return;
  74                         }
  75                 }
  76 
  77                 /** i = pair.getI(); */
  78                 i = (*env)->CallIntMethod(env, pair, pair_geti_mid);
  79                 /** j = pair.getJ(); */
  80                 j = (*env)->CallIntMethod(env, pair, pair_getj_mid);
  81 
  82                 /*  matrix.repopulate(i, j); */
  83                 (*env)->CallVoidMethod(env, matrix, matrix_repopulate_mid, i, j);
  84 
  85                 /** b = stack.empty(); */
  86                 b = (*env)->CallBooleanMethod(env, stack, stack_empty_mid);
  87         }
  88 }