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Thread_WINCE.h

//
// Thread_WINCE.h
//
// $Id: //poco/1.4/Foundation/include/Poco/Thread_WINCE.h#1 $
//
// Library: Foundation
// Package: Threading
// Module:  Thread
//
// Definition of the ThreadImpl class for WIN32.
//
// Copyright (c) 2004-2010, 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_WINCE_INCLUDED
#define Foundation_Thread_WINCE_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Runnable.h"
#include "Poco/UnWindows.h"


#if !defined(TLS_OUT_OF_INDEXES) // Windows CE 5.x does not define this
#define TLS_OUT_OF_INDEXES 0xFFFFFFFF
#endif


namespace Poco {


class Foundation_API ThreadImpl
{
public:     
    typedef DWORD TIDImpl;
      typedef void (*Callable)(void*);
      typedef DWORD (WINAPI *Entry)(LPVOID);

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

            Callable  callback;
            void*     pData; 
      };

      enum Priority
      {
            PRIO_LOWEST_IMPL  = THREAD_PRIORITY_LOWEST,
            PRIO_LOW_IMPL     = THREAD_PRIORITY_BELOW_NORMAL,
            PRIO_NORMAL_IMPL  = THREAD_PRIORITY_NORMAL,
            PRIO_HIGH_IMPL    = THREAD_PRIORITY_ABOVE_NORMAL,
            PRIO_HIGHEST_IMPL = THREAD_PRIORITY_HIGHEST
      };

      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 DWORD WINAPI runnableEntry(LPVOID pThread);
      static DWORD WINAPI callableEntry(LPVOID pThread);

      void createImpl(Entry ent, void* pData);
      void threadCleanup();

private:
      class CurrentThreadHolder
      {
      public:
            CurrentThreadHolder(): _slot(TlsAlloc())
            {
                  if (_slot == TLS_OUT_OF_INDEXES)
                        throw SystemException("cannot allocate thread context key");
            }
            ~CurrentThreadHolder()
            {
                  TlsFree(_slot);
            }
            ThreadImpl* get() const
            {
                  return reinterpret_cast<ThreadImpl*>(TlsGetValue(_slot));
            }
            void set(ThreadImpl* pThread)
            {
                  TlsSetValue(_slot, pThread);
            }
      
      private:
            DWORD _slot;
      };

      Runnable*    _pRunnableTarget;
      CallbackData _callbackTarget;
      HANDLE       _thread;
      DWORD        _threadId;
      int          _prio;
      int          _stackSize;

      static CurrentThreadHolder _currentThreadHolder;
};


//
// inlines
//
inline int ThreadImpl::getPriorityImpl() const
{
      return _prio;
}


inline int ThreadImpl::getOSPriorityImpl() const
{
      return _prio;
}


inline int ThreadImpl::getMinOSPriorityImpl()
{
      return PRIO_LOWEST_IMPL;
}


inline int ThreadImpl::getMaxOSPriorityImpl()
{
      return PRIO_HIGHEST_IMPL;
}


inline void ThreadImpl::sleepImpl(long milliseconds)
{
      Sleep(DWORD(milliseconds));
}


inline void ThreadImpl::yieldImpl()
{
      Sleep(0);
}


inline void ThreadImpl::setStackSizeImpl(int size)
{
      _stackSize = size;
}


inline int ThreadImpl::getStackSizeImpl() const
{
      return _stackSize;
}


inline ThreadImpl::TIDImpl ThreadImpl::tidImpl() const
{
      return _threadId;
}


} // namespace Poco


#endif // Foundation_Thread_WINCE_INCLUDED

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