source: XMLIO_V2/external/include/Poco/Thread_POSIX.h @ 80

//
// Thread_POSIX.h
//
// $Id: //poco/1.3/Foundation/include/Poco/Thread_POSIX.h#10 $
//
// Library: Foundation
// Package: Threading
// Module:  Thread
//
// Definition of the ThreadImpl class for POSIX Threads.
//
// Copyright (c) 2004-2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_Thread_POSIX_INCLUDED
#define Foundation_Thread_POSIX_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Runnable.h"
#include "Poco/SignalHandler.h"
#include "Poco/Event.h"
#include "Poco/RefCountedObject.h"
#include "Poco/AutoPtr.h"
#include <pthread.h>
// must be limits.h (not <climits>) for PTHREAD_STACK_MIN on Solaris
#include <limits.h>
#if !defined(POCO_NO_SYS_SELECT_H)
#include <sys/select.h>
#endif
#include <errno.h>


namespace Poco {


class Foundation_API ThreadImpl
{
public: 
    typedef pthread_t TIDImpl;
        typedef void (*Callable)(void*);

        enum Priority
        {
                PRIO_LOWEST_IMPL,
                PRIO_LOW_IMPL,
                PRIO_NORMAL_IMPL,
                PRIO_HIGH_IMPL,
                PRIO_HIGHEST_IMPL
        };

        struct CallbackData: public RefCountedObject
        {
                CallbackData(): callback(0), pData(0)
                {
                }

                Callable  callback;
                void*     pData; 
        };

        ThreadImpl();                           
        ~ThreadImpl();
    
        TIDImpl tidImpl() const;
        void setPriorityImpl(int prio);
        int getPriorityImpl() const;
        void setOSPriorityImpl(int prio);
        int getOSPriorityImpl() const;
        static int getMinOSPriorityImpl();
        static int getMaxOSPriorityImpl();
        void setStackSizeImpl(int size);
        int getStackSizeImpl() const;
        void startImpl(Runnable& target);
        void startImpl(Callable target, void* pData = 0);

        void joinImpl();
        bool joinImpl(long milliseconds);
        bool isRunningImpl() const;
        static void sleepImpl(long milliseconds);
        static void yieldImpl();
        static ThreadImpl* currentImpl();
        static TIDImpl currentTidImpl();

protected:
        static void* runnableEntry(void* pThread);
        static void* callableEntry(void* pThread);
        static int mapPrio(int prio);
        static int reverseMapPrio(int osPrio);

private:
        class CurrentThreadHolder
        {
        public:
                CurrentThreadHolder()
                {
                        if (pthread_key_create(&_key, NULL))
                                throw SystemException("cannot allocate thread context key");
                }
                ~CurrentThreadHolder()
                {
                        pthread_key_delete(_key);
                }
                ThreadImpl* get() const
                {
                        return reinterpret_cast<ThreadImpl*>(pthread_getspecific(_key));
                }
                void set(ThreadImpl* pThread)
                {
                        pthread_setspecific(_key, pThread);
                }
        
        private:
                pthread_key_t _key;
        };

        struct ThreadData: public RefCountedObject
        {
                ThreadData():
                        pRunnableTarget(0),
                        pCallbackTarget(0),
                        thread(0),
                        prio(PRIO_NORMAL_IMPL),
                        done(false),
                        stackSize(POCO_THREAD_STACK_SIZE)
                {
                }

                Runnable*     pRunnableTarget;
                AutoPtr<CallbackData> pCallbackTarget;
                pthread_t     thread;
                int           prio;
                int           osPrio;
                Event         done;
                std::size_t   stackSize;
        };

        AutoPtr<ThreadData> _pData;

        static CurrentThreadHolder _currentThreadHolder;
        
#if defined(POCO_OS_FAMILY_UNIX)
        SignalHandler::JumpBufferVec _jumpBufferVec;
        friend class SignalHandler;
#endif
};


//
// inlines
//
inline int ThreadImpl::getPriorityImpl() const
{
        return _pData->prio;
}


inline int ThreadImpl::getOSPriorityImpl() const
{
        return _pData->osPrio;
}


inline bool ThreadImpl::isRunningImpl() const
{
        return _pData->pRunnableTarget != 0 ||
                (_pData->pCallbackTarget.get() != 0 && _pData->pCallbackTarget->callback != 0);
}


inline void ThreadImpl::yieldImpl()
{
        sched_yield();
}


inline int ThreadImpl::getStackSizeImpl() const
{
        return _pData->stackSize;
}


inline ThreadImpl::TIDImpl ThreadImpl::tidImpl() const
{
        return _pData->thread;
}


} // namespace Poco


#endif // Foundation_Thread_POSIX_INCLUDED