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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <cassert>
#include <jvmaccess/virtualmachine.hxx>
#include <sal/log.hxx>
#include <utility>
using jvmaccess::VirtualMachine;
VirtualMachine::AttachGuard::CreationException::CreationException()
{}
VirtualMachine::AttachGuard::CreationException::CreationException(
CreationException const &)
{}
VirtualMachine::AttachGuard::CreationException &
VirtualMachine::AttachGuard::CreationException::operator =(
CreationException const &)
{
return *this;
}
VirtualMachine::AttachGuard::AttachGuard(
rtl::Reference< VirtualMachine > xMachine):
m_xMachine(std::move(xMachine))
{
assert(m_xMachine.is());
m_pEnvironment = m_xMachine->attachThread(&m_bDetach);
if (m_pEnvironment == nullptr)
throw CreationException();
}
VirtualMachine::AttachGuard::~AttachGuard()
{
if (m_bDetach)
m_xMachine->detachThread();
}
VirtualMachine::VirtualMachine(JavaVM * pVm, int nVersion, bool bDestroy,
JNIEnv const * pMainThreadEnv):
m_pVm(pVm), m_nVersion(nVersion), m_bDestroy(bDestroy)
{
(void) pMainThreadEnv; // avoid warnings
assert(pVm != nullptr);
assert(nVersion >= JNI_VERSION_1_2);
assert(pMainThreadEnv);
}
VirtualMachine::~VirtualMachine()
{
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();
SAL_WARN_IF(n != JNI_OK, "jvmaccess", "JNI: DestroyJavaVM failed");
*/
}
}
JNIEnv * VirtualMachine::attachThread(bool * pAttached) const
{
assert(pAttached != nullptr && "bad parameter");
JNIEnv * pEnv;
jint n = m_pVm->GetEnv(reinterpret_cast< void ** >(&pEnv), m_nVersion);
SAL_WARN_IF(
n != JNI_OK && n != JNI_EDETACHED, "jvmaccess", "JNI: GetEnv failed");
if (pEnv == nullptr)
{
if (m_pVm->AttachCurrentThread
(
#ifndef ANDROID
reinterpret_cast< void ** >(&pEnv),
#else
// The Android <jni.h> has AttachCurrentThread() taking a
// JNIEnv** and not void **
&pEnv,
#endif
nullptr)
!= JNI_OK)
return nullptr;
*pAttached = true;
}
else
*pAttached = false;
return pEnv;
}
void VirtualMachine::detachThread() const
{
jint n = m_pVm->DetachCurrentThread();
SAL_WARN_IF(n != JNI_OK, "jvmaccess", "JNI: DetachCurrentThread failed");
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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