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/* -*- 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 <sal/config.h>
#include <stdlib.h>
#include <signalshared.hxx>
#include <osl/diagnose.h>
#include <mutex>
namespace
{
oslSignalHandlerImpl* SignalList;
bool bInitSignal = false;
std::mutex& getSignalMutex()
{
static std::mutex aMutex;
return aMutex;
}
}
oslSignalAction callSignalHandler(oslSignalInfo* pInfo)
{
oslSignalHandlerImpl* pHandler = SignalList;
oslSignalAction Action = osl_Signal_ActCallNextHdl;
while (pHandler)
{
if ((Action = pHandler->Handler(pHandler->pData, pInfo)) != osl_Signal_ActCallNextHdl)
break;
pHandler = pHandler->pNext;
}
return Action;
}
oslSignalHandler SAL_CALL osl_addSignalHandler(oslSignalHandlerFunction handler, void* pData)
{
if (!handler)
return nullptr;
oslSignalHandlerImpl* pHandler
= static_cast<oslSignalHandlerImpl*>(calloc(1, sizeof(oslSignalHandlerImpl)));
std::scoped_lock aGuard(getSignalMutex());
if (!bInitSignal)
bInitSignal = onInitSignal();
if (pHandler)
{
pHandler->Handler = handler;
pHandler->pData = pData;
pHandler->pNext = SignalList;
SignalList = pHandler;
return pHandler;
}
return nullptr;
}
sal_Bool SAL_CALL osl_removeSignalHandler(oslSignalHandler handler)
{
std::scoped_lock aGuard(getSignalMutex());
if (!bInitSignal)
bInitSignal = onInitSignal();
oslSignalHandlerImpl* pHandler = SignalList;
oslSignalHandlerImpl* pPrevious = nullptr;
while (pHandler)
{
if (pHandler == handler)
{
if (pPrevious)
pPrevious->pNext = pHandler->pNext;
else
SignalList = pHandler->pNext;
if (SignalList == nullptr)
bInitSignal = onDeInitSignal();
free(pHandler);
return true;
}
pPrevious = pHandler;
pHandler = pHandler->pNext;
}
return false;
}
oslSignalAction SAL_CALL osl_raiseSignal(sal_Int32 userSignal, void* userData)
{
std::scoped_lock aGuard(getSignalMutex());
if (!bInitSignal)
bInitSignal = onInitSignal();
oslSignalInfo info;
info.Signal = osl_Signal_User;
info.UserSignal = userSignal;
info.UserData = userData;
oslSignalAction action = callSignalHandler(&info);
return action;
}
sal_Bool SAL_CALL osl_setErrorReporting(sal_Bool /*bEnable*/)
{
// this is part of the stable API
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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