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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: virtualmachine.cxx,v $
*
* $Revision: 1.7 $
*
* last change: $Author: hr $ $Date: 2006-06-19 18:58:39 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#include "jvmaccess/virtualmachine.hxx"
#include "osl/diagnose.h"
using jvmaccess::VirtualMachine;
VirtualMachine::AttachGuard::CreationException::CreationException()
{}
VirtualMachine::AttachGuard::CreationException::CreationException(
CreationException const &)
{}
VirtualMachine::AttachGuard::CreationException::~CreationException()
{}
VirtualMachine::AttachGuard::CreationException &
VirtualMachine::AttachGuard::CreationException::operator =(
CreationException const &)
{
return *this;
}
VirtualMachine::AttachGuard::AttachGuard(
rtl::Reference< VirtualMachine > const & rMachine):
m_xMachine(rMachine)
{
OSL_ENSURE(m_xMachine.is(), "bad parameter");
m_pEnvironment = m_xMachine->attachThread(&m_bDetach);
if (m_pEnvironment == 0)
throw CreationException();
}
VirtualMachine::AttachGuard::~AttachGuard()
{
if (m_bDetach)
m_xMachine->detachThread();
}
VirtualMachine::VirtualMachine(JavaVM * pVm, int nVersion, bool bDestroy,
JNIEnv * pMainThreadEnv):
m_pVm(pVm), m_nVersion(nVersion), m_bDestroy(bDestroy)
{
#ifdef SOLAR_JAVA
OSL_ENSURE(pVm != 0 && nVersion >= JNI_VERSION_1_2 && pMainThreadEnv != 0,
"bad parameter");
#endif
acquireInitialContextClassLoader(pMainThreadEnv);
}
VirtualMachine::~VirtualMachine()
{
releaseInitialContextClassLoader();
if (m_bDestroy)
{
// Do not destroy the VM. Under Java 1.3, the AWT event loop thread is
// not a daemon thread and is never terminated, so that calling
// DestroyJavaVM (waiting for all non-daemon threads to terminate) hangs
// forever.
/*
jint n = m_pVm->DestroyJavaVM();
OSL_ENSURE(n == JNI_OK, "JNI: DestroyJavaVM failed");
*/
}
}
void VirtualMachine::acquireInitialContextClassLoader(JNIEnv * pEnv)
{
#ifdef SOLAR_JAVA
jclass aClass = pEnv->FindClass("java/lang/Thread");
jmethodID aMethod1 = pEnv->GetStaticMethodID(aClass, "currentThread",
"()Ljava/lang/Thread;");
jobject aThread = pEnv->CallStaticObjectMethod(aClass, aMethod1);
jmethodID aMethod2 = pEnv->GetMethodID(aClass, "getContextClassLoader",
"()Ljava/lang/ClassLoader;");
jobject aClassLoader = pEnv->CallObjectMethod(aThread, aMethod2);
OSL_ENSURE(!pEnv->ExceptionCheck(), "JNI: exception occured");
pEnv->ExceptionClear();
if (aClassLoader == 0)
m_aInitialContextClassLoader = 0;
else
{
m_aInitialContextClassLoader = pEnv->NewGlobalRef(aClassLoader);
OSL_ENSURE(m_aInitialContextClassLoader != 0,
"JNI: NewGlobalRef failed");
}
#endif
}
void VirtualMachine::releaseInitialContextClassLoader() const
{
#ifdef SOLAR_JAVA
if (m_aInitialContextClassLoader != 0)
{
JNIEnv * pEnv;
jint n = m_pVm->AttachCurrentThread(reinterpret_cast< void ** >(&pEnv),
0);
OSL_ENSURE(n == JNI_OK, "JNI: AttachCurrentThread failed");
if (n == JNI_OK)
{
pEnv->DeleteGlobalRef(m_aInitialContextClassLoader);
n = m_pVm->DetachCurrentThread();
OSL_ENSURE(n == JNI_OK, "JNI: DetachCurrentThread failed");
}
}
#endif
}
JNIEnv * VirtualMachine::attachThread(bool * pAttached) const
{
#ifndef SOLAR_JAVA
return 0;
#else
OSL_ENSURE(pAttached != 0, "bad parameter");
JNIEnv * pEnv;
jint n = m_pVm->GetEnv(reinterpret_cast< void ** >(&pEnv), m_nVersion);
if (n != JNI_OK && n != JNI_EDETACHED) {
OSL_ENSURE(false, "JNI: GetEnv failed");
}
if (pEnv == 0)
{
if (m_pVm->AttachCurrentThread(reinterpret_cast< void ** >(&pEnv), 0)
!= JNI_OK)
return 0;
if (m_aInitialContextClassLoader != 0)
{
jclass aClass = pEnv->FindClass("java/lang/Thread");
jmethodID aMethod1 = pEnv->GetStaticMethodID(
aClass, "currentThread", "()Ljava/lang/Thread;");
jobject aThread = pEnv->CallStaticObjectMethod(aClass, aMethod1);
jmethodID aMethod2 = pEnv->GetMethodID(
aClass, "setContextClassLoader", "(Ljava/lang/ClassLoader;)V");
pEnv->CallVoidMethod(aThread, aMethod2,
m_aInitialContextClassLoader);
OSL_ENSURE(!pEnv->ExceptionCheck(), "JNI: exception occured");
pEnv->ExceptionClear();
}
*pAttached = true;
}
else
*pAttached = false;
return pEnv;
#endif
}
void VirtualMachine::detachThread() const
{
#ifdef SOLAR_JAVA
if (m_pVm->DetachCurrentThread() != JNI_OK) {
OSL_ENSURE(false, "JNI: DetachCurrentThread failed");
}
#endif
}
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