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