364 lines
8.6 KiB
C++
364 lines
8.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include "osl/thread.hxx"
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#include "osl/conditn.hxx"
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#include "osl/mutex.hxx"
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#include "cppu/helper/purpenv/Environment.hxx"
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#include "cppu/helper/purpenv/Mapping.hxx"
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#ifdef debug
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# define LOG_LIFECYCLE_AffineBridge
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#endif
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#ifdef LOG_LIFECYCLE_AffineBridge
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# include <iostream>
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# define LOG_LIFECYCLE_AffineBridge_emit(x) x
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#else
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# define LOG_LIFECYCLE_AffineBridge_emit(x)
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#endif
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class InnerThread;
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class OuterThread;
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class SAL_DLLPRIVATE AffineBridge : public cppu::Enterable
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{
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public:
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enum Msg
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{
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CB_DONE,
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CB_FPOINTER
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};
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Msg m_message;
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uno_EnvCallee * m_pCallee;
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va_list * m_pParam;
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osl::Mutex m_innerMutex;
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oslThreadIdentifier m_innerThreadId;
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InnerThread * m_pInnerThread;
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osl::Condition m_innerCondition;
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sal_Int32 m_enterCount;
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osl::Mutex m_outerMutex;
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oslThreadIdentifier m_outerThreadId;
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osl::Condition m_outerCondition;
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OuterThread * m_pOuterThread;
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explicit AffineBridge(void);
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virtual ~AffineBridge(void);
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virtual void v_callInto_v(uno_EnvCallee * pCallee, va_list * pParam);
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virtual void v_callOut_v (uno_EnvCallee * pCallee, va_list * pParam);
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virtual void v_enter(void);
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virtual void v_leave(void);
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virtual int v_isValid(rtl::OUString * pReason);
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void innerDispatch(void);
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void outerDispatch(int loop);
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};
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class SAL_DLLPRIVATE InnerThread : public osl::Thread
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{
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virtual void SAL_CALL run(void);
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AffineBridge * m_pAffineBridge;
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public:
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InnerThread(AffineBridge * threadEnvironment)
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: m_pAffineBridge(threadEnvironment)
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{
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create();
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}
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};
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void InnerThread::run(void)
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{
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m_pAffineBridge->enter();
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m_pAffineBridge->innerDispatch();
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m_pAffineBridge->leave();
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}
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class SAL_DLLPRIVATE OuterThread : public osl::Thread
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{
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virtual void SAL_CALL run(void);
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AffineBridge * m_pAffineBridge;
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public:
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OuterThread(AffineBridge * threadEnvironment);
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};
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OuterThread::OuterThread(AffineBridge * threadEnvironment)
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: m_pAffineBridge(threadEnvironment)
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{
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create();
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}
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void OuterThread::run(void)
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{
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osl::MutexGuard guard(m_pAffineBridge->m_outerMutex);
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m_pAffineBridge->m_outerThreadId = getIdentifier();
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m_pAffineBridge->outerDispatch(0);
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m_pAffineBridge->m_outerThreadId = 0;
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m_pAffineBridge->m_pOuterThread = NULL;
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m_pAffineBridge = NULL;
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}
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AffineBridge::AffineBridge(void)
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: m_innerThreadId(0),
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m_pInnerThread (NULL),
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m_enterCount (0),
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m_outerThreadId(0),
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m_pOuterThread (NULL)
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{
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LOG_LIFECYCLE_AffineBridge_emit(fprintf(stderr, "LIFE: %s -> %p\n", "AffineBridge::AffineBridge(uno_Environment * pEnv)", this));
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}
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AffineBridge::~AffineBridge(void)
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{
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LOG_LIFECYCLE_AffineBridge_emit(fprintf(stderr, "LIFE: %s -> %p\n", "AffineBridge::~AffineBridge(void)", this));
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if (m_pInnerThread && osl_getThreadIdentifier(NULL) != m_innerThreadId)
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{
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m_message = CB_DONE;
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m_innerCondition.set();
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m_pInnerThread->join();
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}
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delete m_pInnerThread;
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if (m_pOuterThread)
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{
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m_pOuterThread->join();
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delete m_pOuterThread;
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}
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}
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void AffineBridge::outerDispatch(int loop)
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{
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OSL_ASSERT(m_outerThreadId == osl_getThreadIdentifier(NULL));
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OSL_ASSERT(m_innerThreadId != m_outerThreadId);
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Msg mm;
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do
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{
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// FIXME: created outer thread must not wait
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// in case of no message
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// note: no message can happen in case newly created
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// outer thread acquire outerMutex after a real outer
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// thread enters outerDispatch!
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m_outerCondition.wait();
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m_outerCondition.reset();
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mm = m_message;
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switch(mm)
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{
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case CB_DONE:
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break;
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case CB_FPOINTER:
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{
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m_pCallee(m_pParam);
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m_message = CB_DONE;
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m_innerCondition.set();
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break;
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}
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default:
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abort();
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}
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}
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while(mm != CB_DONE && loop);
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}
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void AffineBridge::innerDispatch(void)
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{
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OSL_ASSERT(m_innerThreadId == osl_getThreadIdentifier(NULL));
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OSL_ASSERT(m_innerThreadId != m_outerThreadId);
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Msg mm;
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do
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{
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m_innerCondition.wait();
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m_innerCondition.reset();
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mm = m_message;
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switch(mm)
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{
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case CB_DONE:
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break;
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case CB_FPOINTER:
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{
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m_pCallee(m_pParam);
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m_message = CB_DONE;
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m_outerCondition.set();
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break;
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}
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default:
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abort();
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}
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}
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while(mm != CB_DONE);
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}
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void AffineBridge::v_callInto_v(uno_EnvCallee * pCallee, va_list * pParam)
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{
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osl::MutexGuard guard(m_outerMutex); // only one thread at a time can call into
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if (m_innerThreadId == 0) // no inner thread yet
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{
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m_pInnerThread = new InnerThread(this);
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m_pInnerThread->resume();
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}
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bool resetId = false;
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if (!m_outerThreadId)
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{
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m_outerThreadId = osl_getThreadIdentifier(NULL);
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resetId = true;
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}
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m_message = CB_FPOINTER;
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m_pCallee = pCallee;
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m_pParam = pParam;
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m_innerCondition.set();
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outerDispatch(1);
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if (resetId)
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m_outerThreadId = 0;
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}
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void AffineBridge::v_callOut_v(uno_EnvCallee * pCallee, va_list * pParam)
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{
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OSL_ASSERT(m_innerThreadId);
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osl::MutexGuard guard(m_innerMutex);
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if (m_outerThreadId == 0) // no outer thread yet
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{
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osl::MutexGuard guard_m_outerMutex(m_outerMutex);
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if (m_outerThreadId == 0)
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{
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if (m_pOuterThread)
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{
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m_pOuterThread->join();
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delete m_pOuterThread;
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}
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m_pOuterThread = new OuterThread(this);
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}
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}
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m_message = CB_FPOINTER;
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m_pCallee = pCallee;
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m_pParam = pParam;
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m_outerCondition.set();
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innerDispatch();
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}
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void AffineBridge::v_enter(void)
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{
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m_innerMutex.acquire();
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if (!m_enterCount)
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m_innerThreadId = osl_getThreadIdentifier(NULL);
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OSL_ASSERT(m_innerThreadId == osl_getThreadIdentifier(NULL));
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++ m_enterCount;
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}
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void AffineBridge::v_leave(void)
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{
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OSL_ASSERT(m_innerThreadId == osl_getThreadIdentifier(NULL));
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-- m_enterCount;
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if (!m_enterCount)
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m_innerThreadId = 0;
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m_innerMutex.release();
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}
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int AffineBridge::v_isValid(rtl::OUString * pReason)
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{
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int result = 1;
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result = m_enterCount > 0;
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if (!result)
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*pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("not entered"));
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else
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{
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result = m_innerThreadId == osl_getThreadIdentifier(NULL);
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if (!result)
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*pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("wrong thread"));
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}
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if (result)
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*pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("OK"));
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return result;
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}
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extern "C" void SAL_DLLPUBLIC_EXPORT SAL_CALL uno_initEnvironment(uno_Environment * pEnv)
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SAL_THROW_EXTERN_C()
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{
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cppu::helper::purpenv::Environment_initWithEnterable(pEnv, new AffineBridge());
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}
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extern "C" void SAL_DLLPUBLIC_EXPORT SAL_CALL uno_ext_getMapping(uno_Mapping ** ppMapping,
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uno_Environment * pFrom,
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uno_Environment * pTo )
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{
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cppu::helper::purpenv::createMapping(ppMapping, pFrom, pTo);
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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