54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
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/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <jni.h>
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/*
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* Class: CallWithJNIWeak
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* Method: doStuff
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* Signature: (Ljava/lang/Object;)Ljava/lang/Object;
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*/
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JNIEXPORT jobject JNICALL
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Java_CallWithJNIWeak_doStuff(JNIEnv *env, jclass c, jobject o) {
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jmethodID id = (*env)->GetStaticMethodID(
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env, c, "doWithWeak", "(Ljava/lang/Object;)Ljava/lang/Object;");
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jweak w = (*env)->NewWeakGlobalRef(env, o);
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jobject param = w;
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(*env)->CallStaticVoidMethod(env, c, id, param);
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return param;
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}
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/*
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* Class: CallWithJNIWeak
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* Method: doWithWeak
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* Signature: (Ljava/lang/Object;)Ljava/lang/Object;
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*/
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JNIEXPORT jobject JNICALL
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Java_CallWithJNIWeak_doWithWeak(JNIEnv *env, jclass c, jobject o) {
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jclass thr_class = (*env)->GetObjectClass(env, o); // o is java.lang.Thread
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jmethodID id = (*env)->GetMethodID(env, thr_class, "isInterrupted", "()Z");
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jboolean b = (*env)->CallBooleanMethod(env, o, id);
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return o;
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}
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