cppu/source/UnsafeBridge/UnsafeBridge.cxx

   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
  21 #include "osl/mutex.hxx"
  22 #include "osl/thread.h"
  23
  24 #include "cppu/helper/purpenv/Environment.hxx"
  25 #include "cppu/helper/purpenv/Mapping.hxx"
  26
  27
  28 #ifdef debug
  29 # define LOG_LIFECYCLE_UnsafeBridge
  30 #endif
  31
  32 #ifdef LOG_LIFECYCLE_UnsafeBridge
  33 #  include <iostream>
  34 #  define LOG_LIFECYCLE_UnsafeBridge_emit(x) x
  35
  36 #else
  37 #  define LOG_LIFECYCLE_UnsafeBridge_emit(x)
  38
  39 #endif
  40
  41
  42 class SAL_DLLPRIVATE UnsafeBridge : public cppu::Enterable
  43 {
  44     osl::Mutex          m_mutex;
  45     sal_Int32           m_count;
  46     oslThreadIdentifier m_threadId;
  47
  48     virtual  ~UnsafeBridge(void);
  49
  50 public:
  51     explicit UnsafeBridge(void);
  52
  53     virtual void v_callInto_v(uno_EnvCallee * pCallee, va_list * pParam);
  54     virtual void v_callOut_v (uno_EnvCallee * pCallee, va_list * pParam);
  55
  56     virtual void v_enter(void);
  57     virtual void v_leave(void);
  58
  59     virtual int  v_isValid(rtl::OUString * pReason);
  60 };
  61
  62 UnsafeBridge::UnsafeBridge(void)
  63     : m_count   (0),
  64       m_threadId(0)
  65 {
  66     LOG_LIFECYCLE_UnsafeBridge_emit(fprintf(stderr, "LIFE: %s -> %p\n", "UnsafeBridge::UnsafeBridge(uno_Environment * pEnv)", this));
  67 }
  68
  69 UnsafeBridge::~UnsafeBridge(void)
  70 {
  71     LOG_LIFECYCLE_UnsafeBridge_emit(fprintf(stderr, "LIFE: %s -> %p\n", "UnsafeBridge::~UnsafeBridge(void)", this));
  72
  73     OSL_ASSERT(m_count >= 0);
  74 }
  75
  76 void UnsafeBridge::v_callInto_v(uno_EnvCallee * pCallee, va_list * pParam)
  77 {
  78     enter();
  79     pCallee(pParam);
  80     leave();
  81 }
  82
  83 void UnsafeBridge::v_callOut_v(uno_EnvCallee * pCallee, va_list * pParam)
  84 {
  85     OSL_ASSERT(m_count > 0);
  86
  87     -- m_count;
  88     pCallee(pParam);
  89     ++ m_count;
  90
  91     if (!m_threadId)
  92         m_threadId = osl_getThreadIdentifier(NULL);
  93 }
  94
  95 void UnsafeBridge::v_enter(void)
  96 {
  97     m_mutex.acquire();
  98
  99     OSL_ASSERT(m_count >= 0);
 100
 101     if (m_count == 0)
 102         m_threadId = osl_getThreadIdentifier(NULL);
 103
 104     ++ m_count;
 105 }
 106
 107 void UnsafeBridge::v_leave(void)
 108 {
 109     OSL_ASSERT(m_count > 0);
 110
 111     -- m_count;
 112     if (!m_count)
 113         m_threadId = 0;
 114
 115
 116     m_mutex.release();
 117 }
 118
 119 int UnsafeBridge::v_isValid(rtl::OUString * pReason)
 120 {
 121     int result = 1;
 122
 123     result = m_count > 0;
 124     if (!result)
 125         *pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("not entered"));
 126
 127     else
 128     {
 129         result = m_threadId == osl_getThreadIdentifier(NULL);
 130
 131         if (!result)
 132             *pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("wrong thread"));
 133     }
 134
 135     if (result)
 136         *pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("OK"));
 137
 138     return result;
 139 }
 140
 141 extern "C" void SAL_DLLPUBLIC_EXPORT SAL_CALL uno_initEnvironment(uno_Environment * pEnv)
 142     SAL_THROW_EXTERN_C()
 143 {
 144     cppu::helper::purpenv::Environment_initWithEnterable(pEnv, new UnsafeBridge());
 145 }
 146
 147 extern "C" void SAL_DLLPUBLIC_EXPORT SAL_CALL uno_ext_getMapping(uno_Mapping     ** ppMapping,
 148                                    uno_Environment  * pFrom,
 149                                    uno_Environment  * pTo )
 150 {
 151     cppu::helper::purpenv::createMapping(ppMapping, pFrom, pTo);
 152 }
 153
 154 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */