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 /*
  25  * Native support for ReturnJNIWeak test.
  26  */
  27 
  28 #include "jni.h"
  29 
  30 static jweak registered = NULL;
  31 
  32 JNIEXPORT void JNICALL
  33 Java_ReturnJNIWeak_registerObject(JNIEnv* env,
  34                                   jclass jclazz,
  35                                   jobject value) {
  36   // assert registered == NULL
  37   registered = (*env)->NewWeakGlobalRef(env, value);
  38 }
  39 
  40 JNIEXPORT void JNICALL
  41 Java_ReturnJNIWeak_unregisterObject(JNIEnv* env, jclass jclazz) {
  42   if (registered != NULL) {
  43     (*env)->DeleteWeakGlobalRef(env, registered);
  44     registered = NULL;
  45   }
  46 }
  47 
  48 JNIEXPORT jobject JNICALL
  49 Java_ReturnJNIWeak_getObject(JNIEnv* env, jclass jclazz) {
  50   // assert registered != NULL
  51   return registered;
  52 }