1 /*
   2  * Copyright (c) 2017, 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 
  24 #include <jni.h>
  25 #include <stdio.h>
  26 
  27 void reduceLocalCapacity(JNIEnv* env) {
  28     puts("reduceLocalCapacity: setting to 1");
  29     (*env)->EnsureLocalCapacity(env,1);
  30 }
  31 
  32 JNIEXPORT void JNICALL
  33 Java_TestCheckedEnsureLocalCapacity_ensureCapacity(JNIEnv *env,
  34                                                    jobject unused,
  35                                                    jobject target,
  36                                                    jint capacity,
  37                                                    jint copies) {
  38   int i;
  39   printf("ensureCapacity: setting to %d\n", capacity);
  40   (*env)->EnsureLocalCapacity(env, capacity); // set high
  41   reduceLocalCapacity(env);     // sets low
  42 
  43   printf("ensureCapacity: creating %d LocalRefs\n", copies);
  44   for (i = 0; i < copies; i++) {
  45     target = (*env)->NewLocalRef(env, target);
  46   }
  47 
  48   puts("ensureCapacity: done");
  49 }