/****************************************************************************
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
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****************************************************************************/

#ifndef QTCONCURRENT_EXCEPTION_H
#define QTCONCURRENT_EXCEPTION_H

#include <QtCore/qglobal.h>

#ifndef QT_NO_QFUTURE

#include <QtCore/qatomic.h>

#ifndef QT_NO_EXCEPTIONS
#  include <exception>
#endif

QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE

QT_MODULE(Core)

namespace QtConcurrent
{

#ifndef QT_NO_EXCEPTIONS

class Q_CORE_EXPORT Exception : public std::exception
{
public:
    virtual void raise() const;
    virtual Exception *clone() const;
};

class Q_CORE_EXPORT UnhandledException : public Exception
{
public:
    void raise() const;
    Exception *clone() const;
};

namespace internal {

class Base;
class ExceptionHolder
{
public:
    ExceptionHolder(Exception *exception = 0);
    ExceptionHolder(const ExceptionHolder &other);
    void operator=(const ExceptionHolder &other);
    ~ExceptionHolder();
    Exception *exception() const;
    Base *base;
};

class Q_CORE_EXPORT ExceptionStore
{
public:
    void setException(const Exception &e);
    bool hasException() const;
    ExceptionHolder exception();
    void throwPossibleException();
    bool hasThrown() const;
    ExceptionHolder exceptionHolder;
};

} // namespace internal

#else // QT_NO_EXCEPTIONS

namespace internal {

class Q_CORE_EXPORT ExceptionStore
{
public:
    ExceptionStore() { }
    inline void throwPossibleException() const {}
};

} // namespace internal

#endif

} // namespace QtConcurrent

QT_END_NAMESPACE
QT_END_HEADER

#endif // QT_NO_CONCURRENT

#endif
