poco/Foundation/include/Poco/Thread_WINCE.h

//
// Thread_WINCE.h
//
// $Id: //poco/1.4/Foundation/include/Poco/Thread_WINCE.h#3 $
//
// Library: Foundation
// Package: Threading
// Module:  Thread
//
// Definition of the ThreadImpl class for WIN32.
//
// Copyright (c) 2004-2010, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_Thread_WINCE_INCLUDED
#define Foundation_Thread_WINCE_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Runnable.h"
#include "Poco/SharedPtr.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);

  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
  };

  enum Policy
  {
    POLICY_DEFAULT_IMPL = 0
  };

  ThreadImpl();
  ~ThreadImpl();

  TIDImpl tidImpl() const;
  void setPriorityImpl(int prio);
  int getPriorityImpl() const;
  void setOSPriorityImpl(int prio, int policy = 0);
  int getOSPriorityImpl() const;
  static int getMinOSPriorityImpl(int policy);
  static int getMaxOSPriorityImpl(int policy);
  void setStackSizeImpl(int size);
  int getStackSizeImpl() const;
  void setAffinityImpl(unsigned cpu);
  unsigned getAffinityImpl() const;
  void startImpl(SharedPtr<Runnable> pTarget);
  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);

  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;
  };

  SharedPtr<Runnable> _pRunnableTarget;
  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(int /* policy */)
{
  return PRIO_LOWEST_IMPL;
}


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

inline void ThreadImpl::setAffinityImpl(unsigned cpu)
{
  (void)cpu;
  throw Poco::NotImplementedException("Thread affinity not supported on this system");
}

inline unsigned ThreadImpl::getAffinityImpl()
{
  throw Poco::NotImplementedException("Thread affinity not supported on this system");
}

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