1 files changed, 119 insertions, 0 deletions
diff --git a/jvmaccess/source/virtualmachine.cxx b/jvmaccess/source/virtualmachine.cxx
new file mode 100644
index 000000000..eb4b8069c
--- /dev/null
+++ b/jvmaccess/source/virtualmachine.cxx
@@ -0,0 +1,119 @@
+/* -*- 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: */