/* -*- 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 <osl/thread.hxx>
#include <osl/conditn.hxx>
#include <osl/mutex.hxx>
#include <osl/diagnose.h>
#include <sal/log.hxx>
#include <cppu/Enterable.hxx>
#include <cppu/helper/purpenv/Environment.hxx>
#include <cppu/helper/purpenv/Mapping.hxx>
#include <memory>
class InnerThread;
class OuterThread;
class 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;
std::unique_ptr<InnerThread> m_pInnerThread;
osl::Condition m_innerCondition;
sal_Int32 m_enterCount;
osl::Mutex m_outerMutex;
oslThreadIdentifier m_outerThreadId;
osl::Condition m_outerCondition;
std::unique_ptr<OuterThread> m_pOuterThread;
explicit AffineBridge();
virtual ~AffineBridge() override;
virtual void v_callInto_v(uno_EnvCallee * pCallee, va_list * pParam) override;
virtual void v_callOut_v (uno_EnvCallee * pCallee, va_list * pParam) override;
virtual void v_enter() override;
virtual void v_leave() override;
virtual bool v_isValid(rtl::OUString * pReason) override;
void innerDispatch();
void outerDispatch(bool loop);
};
class InnerThread : public osl::Thread
{
virtual void SAL_CALL run() override;
AffineBridge * m_pAffineBridge;
public:
explicit InnerThread(AffineBridge * threadEnvironment)
: m_pAffineBridge(threadEnvironment)
{
create();
}
};
void InnerThread::run()
{
osl_setThreadName("UNO AffineBridge InnerThread");
m_pAffineBridge->enter();
m_pAffineBridge->innerDispatch();
m_pAffineBridge->leave();
}
class OuterThread : public osl::Thread
{
virtual void SAL_CALL run() override;
AffineBridge * m_pAffineBridge;
public:
explicit OuterThread(AffineBridge * threadEnvironment);
};
OuterThread::OuterThread(AffineBridge * threadEnvironment)
: m_pAffineBridge(threadEnvironment)
{
create();
}
void OuterThread::run()
{
osl_setThreadName("UNO AffineBridge OuterThread");
osl::MutexGuard guard(m_pAffineBridge->m_outerMutex);
m_pAffineBridge->m_outerThreadId = getIdentifier();
m_pAffineBridge->outerDispatch(false);
m_pAffineBridge->m_outerThreadId = 0;
m_pAffineBridge->m_pOuterThread = nullptr;
m_pAffineBridge = nullptr;
}
AffineBridge::AffineBridge()
: m_message (CB_DONE),
m_pCallee (nullptr),
m_pParam (nullptr),
m_innerThreadId(0),
m_enterCount (0),
m_outerThreadId(0)
{
SAL_INFO("cppu.affinebridge", "LIFE: AffineBridge::AffineBridge(uno_Environment * pEnv) -> " << this);
}
AffineBridge::~AffineBridge()
{
SAL_INFO("cppu.affinebridge", "LIFE: AffineBridge::~AffineBridge() -> " << this);
if (m_pInnerThread && osl::Thread::getCurrentIdentifier() != m_innerThreadId)
{
m_message = CB_DONE;
m_innerCondition.set();
m_pInnerThread->join();
}
m_pInnerThread.reset();
if (m_pOuterThread)
{
m_pOuterThread->join();
}
}
void AffineBridge::outerDispatch(bool loop)
{
OSL_ASSERT(m_outerThreadId == osl::Thread::getCurrentIdentifier());
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()
{
OSL_ASSERT(m_innerThreadId == osl::Thread::getCurrentIdentifier());
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.reset(new InnerThread(this));
m_pInnerThread->resume();
}
bool bResetId = false;
if (!m_outerThreadId)
{
m_outerThreadId = osl::Thread::getCurrentIdentifier();
bResetId = true;
}
m_message = CB_FPOINTER;
m_pCallee = pCallee;
m_pParam = pParam;
m_innerCondition.set();
outerDispatch(true);
if (bResetId)
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();
}
m_pOuterThread.reset(new OuterThread(this));
}
}
m_message = CB_FPOINTER;
m_pCallee = pCallee;
m_pParam = pParam;
m_outerCondition.set();
innerDispatch();
}
void AffineBridge::v_enter()
{
m_innerMutex.acquire();
if (!m_enterCount)
m_innerThreadId = osl::Thread::getCurrentIdentifier();
OSL_ASSERT(m_innerThreadId == osl::Thread::getCurrentIdentifier());
++ m_enterCount;
}
void AffineBridge::v_leave()
{
OSL_ASSERT(m_innerThreadId == osl::Thread::getCurrentIdentifier());
-- m_enterCount;
if (!m_enterCount)
m_innerThreadId = 0;
m_innerMutex.release();
}
bool AffineBridge::v_isValid(rtl::OUString * pReason)
{
bool result = m_enterCount > 0;
if (!result)
*pReason = "not entered";
else
{
result = m_innerThreadId == osl::Thread::getCurrentIdentifier();
if (!result)
*pReason = "wrong thread";
}
if (result)
*pReason = "OK";
return result;
}
#ifdef DISABLE_DYNLOADING
#define uno_initEnvironment affine_uno_uno_initEnvironment
#define uno_ext_getMapping affine_uno_uno_ext_getMapping
#endif
extern "C" void SAL_DLLPUBLIC_EXPORT uno_initEnvironment(uno_Environment * pEnv)
SAL_THROW_EXTERN_C()
{
cppu::helper::purpenv::Environment_initWithEnterable(pEnv, new AffineBridge());
}
extern "C" void SAL_DLLPUBLIC_EXPORT uno_ext_getMapping(uno_Mapping ** ppMapping,
uno_Environment * pFrom,
uno_Environment * pTo )
{
cppu::helper::purpenv::createMapping(ppMapping, pFrom, pTo);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
↑ V547 Expression 'm_outerThreadId == 0' is always true.