/* * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ #include "jni.h" #include "nsk_tools.h" extern "C" { JNIEXPORT void JNICALL Java_nsk_share_locks_JNIMonitorLocker_doLock(JNIEnv *env, jobject thisObject) { /* This method executes JNI analog for following Java code: JNI_MonitorEnter(this); step1.unlockAll(); step2.waitFor(); readyWicket.unlock(); inner.lock(); JNI_MonitorExit(this); */ jint success; jfieldID field; jclass thisObjectClass; // fields 'step1' and 'step2' jobject wicketObject; // class for fields 'step1', 'step2', 'readyWicket' jclass wicketClass; // field 'inner' jobject innerObject; // class for field 'inner' jclass deadlockLockerClass; success = env->MonitorEnter(thisObject); if(success != 0) { NSK_COMPLAIN1("MonitorEnter return non-zero: %d\n", success); env->ThrowNew( env->FindClass("nsk/share/TestJNIError"), "MonitorEnter return non-zero"); } thisObjectClass = env->GetObjectClass(thisObject); // step1.unlockAll() field = env->GetFieldID(thisObjectClass, "step1", "Lnsk/share/Wicket;"); wicketObject = env->GetObjectField(thisObject, field); wicketClass = env->GetObjectClass(wicketObject); env->CallVoidMethod(wicketObject, env->GetMethodID(wicketClass, "unlockAll", "()V")); // step2.waitFor() field = env->GetFieldID(thisObjectClass, "step2", "Lnsk/share/Wicket;"); wicketObject = env->GetObjectField(thisObject, field); env->CallVoidMethod(wicketObject, env->GetMethodID(wicketClass, "waitFor", "()V")); // readyWicket.unlock() field = env->GetFieldID(thisObjectClass, "readyWicket", "Lnsk/share/Wicket;"); wicketObject = env->GetObjectField(thisObject, field); env->CallVoidMethod(wicketObject, env->GetMethodID(wicketClass, "unlock", "()V")); // inner.lock() field = env->GetFieldID(thisObjectClass, "inner", "Lnsk/share/locks/DeadlockLocker;"); innerObject = env->GetObjectField(thisObject, field); deadlockLockerClass = env->GetObjectClass(innerObject); env->CallVoidMethod(innerObject, env->GetMethodID(deadlockLockerClass, "lock", "()V")); success = env->MonitorExit(thisObject); if(success != 0) { NSK_COMPLAIN1("MonitorExit return non-zero: %d\n", success); env->ThrowNew( env->FindClass("nsk/share/TestJNIError"), "MonitorExit return non-zero"); } } }