212 lines
7.1 KiB
C++
212 lines
7.1 KiB
C++
/*************************************************************************
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*
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* $RCSfile: virtualmachine.cxx,v $
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*
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* $Revision: 1.5 $
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*
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* last change: $Author: obo $ $Date: 2005-06-15 10:25:58 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#include "jvmaccess/virtualmachine.hxx"
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#include "osl/diagnose.h"
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using jvmaccess::VirtualMachine;
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VirtualMachine::AttachGuard::CreationException::CreationException()
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{}
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VirtualMachine::AttachGuard::CreationException::CreationException(
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CreationException const &)
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{}
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VirtualMachine::AttachGuard::CreationException::~CreationException()
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{}
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VirtualMachine::AttachGuard::CreationException &
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VirtualMachine::AttachGuard::CreationException::operator =(
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CreationException const &)
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{
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return *this;
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}
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VirtualMachine::AttachGuard::AttachGuard(
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rtl::Reference< VirtualMachine > const & rMachine):
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m_xMachine(rMachine)
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{
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OSL_ENSURE(m_xMachine.is(), "bad parameter");
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m_pEnvironment = m_xMachine->attachThread(&m_bDetach);
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if (m_pEnvironment == 0)
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throw CreationException();
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}
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VirtualMachine::AttachGuard::~AttachGuard()
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{
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if (m_bDetach)
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m_xMachine->detachThread();
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}
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VirtualMachine::VirtualMachine(JavaVM * pVm, int nVersion, bool bDestroy,
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JNIEnv * pMainThreadEnv):
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m_pVm(pVm), m_nVersion(nVersion), m_bDestroy(bDestroy)
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{
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#ifdef SOLAR_JAVA
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OSL_ENSURE(pVm != 0 && nVersion >= JNI_VERSION_1_2 && pMainThreadEnv != 0,
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"bad parameter");
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#endif
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acquireInitialContextClassLoader(pMainThreadEnv);
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}
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VirtualMachine::~VirtualMachine()
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{
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releaseInitialContextClassLoader();
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if (m_bDestroy)
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{
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// Do not destroy the VM. Under Java 1.3, the AWT event loop thread is
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// not a daemon thread and is never terminated, so that calling
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// DestroyJavaVM (waiting for all non-daemon threads to terminate) hangs
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// forever.
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/*
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jint n = m_pVm->DestroyJavaVM();
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OSL_ENSURE(n == JNI_OK, "JNI: DestroyJavaVM failed");
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*/
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}
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}
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void VirtualMachine::acquireInitialContextClassLoader(JNIEnv * pEnv)
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{
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#ifdef SOLAR_JAVA
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jclass aClass = pEnv->FindClass("java/lang/Thread");
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jmethodID aMethod1 = pEnv->GetStaticMethodID(aClass, "currentThread",
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"()Ljava/lang/Thread;");
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jobject aThread = pEnv->CallStaticObjectMethod(aClass, aMethod1);
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jmethodID aMethod2 = pEnv->GetMethodID(aClass, "getContextClassLoader",
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"()Ljava/lang/ClassLoader;");
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jobject aClassLoader = pEnv->CallObjectMethod(aThread, aMethod2);
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OSL_ENSURE(!pEnv->ExceptionCheck(), "JNI: exception occured");
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pEnv->ExceptionClear();
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if (aClassLoader == 0)
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m_aInitialContextClassLoader = 0;
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else
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{
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m_aInitialContextClassLoader = pEnv->NewGlobalRef(aClassLoader);
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OSL_ENSURE(m_aInitialContextClassLoader != 0,
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"JNI: NewGlobalRef failed");
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}
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#endif
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}
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void VirtualMachine::releaseInitialContextClassLoader() const
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{
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#ifdef SOLAR_JAVA
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if (m_aInitialContextClassLoader != 0)
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{
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JNIEnv * pEnv;
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jint n = m_pVm->AttachCurrentThread(reinterpret_cast< void ** >(&pEnv),
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0);
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OSL_ENSURE(n == JNI_OK, "JNI: AttachCurrentThread failed");
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if (n == JNI_OK)
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{
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pEnv->DeleteGlobalRef(m_aInitialContextClassLoader);
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n = m_pVm->DetachCurrentThread();
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OSL_ENSURE(n == JNI_OK, "JNI: DetachCurrentThread failed");
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}
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}
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#endif
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}
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JNIEnv * VirtualMachine::attachThread(bool * pAttached) const
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{
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#ifndef SOLAR_JAVA
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return 0;
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#else
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OSL_ENSURE(pAttached != 0, "bad parameter");
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JNIEnv * pEnv;
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jint n = m_pVm->GetEnv(reinterpret_cast< void ** >(&pEnv), m_nVersion);
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OSL_ENSURE(n == JNI_OK || n == JNI_EDETACHED, "JNI: GetEnv failed");
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if (pEnv == 0)
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{
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if (m_pVm->AttachCurrentThread(reinterpret_cast< void ** >(&pEnv), 0)
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!= JNI_OK)
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return 0;
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if (m_aInitialContextClassLoader != 0)
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{
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jclass aClass = pEnv->FindClass("java/lang/Thread");
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jmethodID aMethod1 = pEnv->GetStaticMethodID(
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aClass, "currentThread", "()Ljava/lang/Thread;");
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jobject aThread = pEnv->CallStaticObjectMethod(aClass, aMethod1);
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jmethodID aMethod2 = pEnv->GetMethodID(
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aClass, "setContextClassLoader", "(Ljava/lang/ClassLoader;)V");
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pEnv->CallVoidMethod(aThread, aMethod2,
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m_aInitialContextClassLoader);
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OSL_ENSURE(!pEnv->ExceptionCheck(), "JNI: exception occured");
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pEnv->ExceptionClear();
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}
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*pAttached = true;
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}
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else
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*pAttached = false;
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return pEnv;
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#endif
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}
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void VirtualMachine::detachThread() const
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{
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#ifdef SOLAR_JAVA
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jint n = m_pVm->DetachCurrentThread();
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OSL_ENSURE(n == JNI_OK, "JNI: DetachCurrentThread failed");
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#endif
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}
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