threadmanager.hxx

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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_SW_SOURCE_CORE_DOCNODE_THREADMANAGER_HXX
#define INCLUDED_SW_SOURCE_CORE_DOCNODE_THREADMANAGER_HXX

#include <vcl/idle.hxx>
#include <osl/mutex.hxx>
#include <osl/interlck.h>
#include <rtl/ref.hxx>

#include <deque>
#include <cppuhelper/weakref.hxx>
#include <observablethread.hxx>

#include <memory>

namespace com::sun::star::util { class XCancellable; }
namespace com::sun::star::util { class XJobManager; }

class IFinishedThreadListener;
class ThreadListener;
class Timer;

class ThreadManager final
{
    public:

        explicit ThreadManager( css::uno::Reference< css::util::XJobManager > const & rThreadJoiner );
        ~ThreadManager();

        std::weak_ptr< IFinishedThreadListener > GetThreadListenerWeakRef();
        void NotifyAboutFinishedThread( const oslInterlockedCount nThreadID );

        void Init();

        oslInterlockedCount AddThread(
                            const ::rtl::Reference< ObservableThread >& rThread );

        void RemoveThread( const oslInterlockedCount nThreadID,
                           const bool bThreadFinished = false );

        DECL_LINK( TryToStartNewThread, Timer*, void );

        void SuspendStartingOfThreads()
        {
            osl::MutexGuard aGuard(maMutex);

            mbStartingOfThreadsSuspended = true;
        }

        void ResumeStartingOfThreads();

        bool StartingOfThreadsSuspended()
        {
            osl::MutexGuard aGuard(maMutex);

            return mbStartingOfThreadsSuspended;
        }

        struct tThreadData
        {
            oslInterlockedCount nThreadID;
            ::rtl::Reference< ObservableThread > pThread;
            css::uno::Reference< css::util::XCancellable > aJob;

            tThreadData()
                : nThreadID( 0 ),
                  aJob()
            {}
        };

    private:

        static const std::deque< tThreadData >::size_type mnStartedSize;

        osl::Mutex maMutex;

        css::uno::WeakReference< css::util::XJobManager > mrThreadJoiner;

        std::shared_ptr< ThreadListener > mpThreadListener;

        oslInterlockedCount mnThreadIDCounter;

        std::deque< tThreadData > maWaitingForStartThreads;
        std::deque< tThreadData > maStartedThreads;

        Idle maStartNewThreadIdle;

        bool mbStartingOfThreadsSuspended;

        struct ThreadPred
        {
            oslInterlockedCount const mnThreadID;
            explicit ThreadPred( oslInterlockedCount nThreadID )
                : mnThreadID( nThreadID )
            {}

            bool operator() ( const tThreadData& rThreadData ) const
            {
                return rThreadData.nThreadID == mnThreadID;
            }
        };

        bool StartWaitingThread();

        bool StartThread( const tThreadData& aThreadData );
};
#endif

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