1 /*
 2  * Copyright (c) 2024, 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 
26 JNIEXPORT void JNICALL
27 Java_LockedMonitorInNative_runWithSynchronizedNative(JNIEnv *env, jobject obj, jobject task) {
28     jclass clazz = (*env)->GetObjectClass(env, obj);
29     jmethodID mid = (*env)->GetMethodID(env, clazz, "run", "(Ljava/lang/Runnable;)V");
30     if (mid != NULL) {
31         (*env)->CallVoidMethod(env, obj, mid, task);
32     }
33 }
34 
35 JNIEXPORT void JNICALL
36 Java_LockedMonitorInNative_runWithMonitorEnteredInNative(JNIEnv *env, jobject obj, jobject lock, jobject task) {
37     jclass clazz = (*env)->GetObjectClass(env, obj);
38     jmethodID mid = (*env)->GetMethodID(env, clazz, "run", "(Ljava/lang/Runnable;)V");
39     if (mid != NULL && (*env)->MonitorEnter(env, lock) == 0) {
40         (*env)->CallVoidMethod(env, obj, mid, task);
41         (*env)->MonitorExit(env, lock);  // can be called with pending exception
42     }
43 }