Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include <sal/config.h>
      21             : 
      22             : #include <cassert>
      23             : 
      24             : #include <jvmaccess/virtualmachine.hxx>
      25             : #include <sal/log.hxx>
      26             : 
      27             : using jvmaccess::VirtualMachine;
      28             : 
      29           0 : VirtualMachine::AttachGuard::CreationException::CreationException()
      30           0 : {}
      31             : 
      32           0 : VirtualMachine::AttachGuard::CreationException::CreationException(
      33           0 :     CreationException const &)
      34           0 : {}
      35             : 
      36           0 : VirtualMachine::AttachGuard::CreationException::~CreationException()
      37           0 : {}
      38             : 
      39             : VirtualMachine::AttachGuard::CreationException &
      40           0 : VirtualMachine::AttachGuard::CreationException::operator =(
      41             :     CreationException const &)
      42             : {
      43           0 :     return *this;
      44             : }
      45             : 
      46      250559 : VirtualMachine::AttachGuard::AttachGuard(
      47             :     rtl::Reference< VirtualMachine > const & rMachine):
      48      250559 :     m_xMachine(rMachine)
      49             : {
      50             :     assert(m_xMachine.is());
      51      250559 :     m_pEnvironment = m_xMachine->attachThread(&m_bDetach);
      52      250559 :     if (m_pEnvironment == 0)
      53           0 :         throw CreationException();
      54      250559 : }
      55             : 
      56      501118 : VirtualMachine::AttachGuard::~AttachGuard()
      57             : {
      58      250559 :     if (m_bDetach)
      59      208025 :         m_xMachine->detachThread();
      60      250559 : }
      61             : 
      62           7 : VirtualMachine::VirtualMachine(JavaVM * pVm, int nVersion, bool bDestroy,
      63             :                                JNIEnv * pMainThreadEnv):
      64           7 :     m_pVm(pVm), m_nVersion(nVersion), m_bDestroy(bDestroy)
      65             : {
      66             :     (void) pMainThreadEnv; // avoid warnings
      67             :     assert(pVm != 0);
      68             :     assert(nVersion >= JNI_VERSION_1_2);
      69             :     assert(pMainThreadEnv);
      70           7 : }
      71             : 
      72           9 : VirtualMachine::~VirtualMachine()
      73             : {
      74           3 :     if (m_bDestroy)
      75             :     {
      76             :         // Do not destroy the VM.  Under Java 1.3, the AWT event loop thread is
      77             :         // not a daemon thread and is never terminated, so that calling
      78             :         // DestroyJavaVM (waiting for all non-daemon threads to terminate) hangs
      79             :         // forever.
      80             : /*
      81             :         jint n = m_pVm->DestroyJavaVM();
      82             :         SAL_WARN_IF(n != JNI_OK, "jvmaccess", "JNI: DestroyJavaVM failed");
      83             : */
      84             :     }
      85           6 : }
      86             : 
      87      250559 : JNIEnv * VirtualMachine::attachThread(bool * pAttached) const
      88             : {
      89             :     assert(pAttached != 0 && "bad parameter");
      90             :     JNIEnv * pEnv;
      91      250559 :     jint n = m_pVm->GetEnv(reinterpret_cast< void ** >(&pEnv), m_nVersion);
      92             :     SAL_WARN_IF(
      93             :         n != JNI_OK && n != JNI_EDETACHED, "jvmaccess", "JNI: GetEnv failed");
      94      250559 :     if (pEnv == 0)
      95             :     {
      96      208025 :         if (m_pVm->AttachCurrentThread
      97             :             (
      98             : #ifndef ANDROID
      99             :              reinterpret_cast< void ** >(&pEnv),
     100             : #else
     101             :              // The Android <jni.h> has AttachCurrentThread() taking a
     102             :              // JNIEnv** and not void **
     103             :              &pEnv,
     104             : #endif
     105      208025 :              0)
     106             :             != JNI_OK)
     107           0 :             return 0;
     108      208025 :         *pAttached = true;
     109             :     }
     110             :     else
     111       42534 :         *pAttached = false;
     112      250559 :     return pEnv;
     113             : }
     114             : 
     115      208025 : void VirtualMachine::detachThread() const
     116             : {
     117      208025 :     jint n = m_pVm->DetachCurrentThread();
     118             :     SAL_WARN_IF(n != JNI_OK, "jvmaccess", "JNI: DetachCurrentThread failed");
     119      208025 : }
     120             : 
     121             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */