#ifndef THREAD_H
#define THREAD_H

#include "port.h"

#ifndef NON_UNIX
#include <poll.h>
#include <pthread.h>
#endif

class Thread;

typedef void *PVOID;

typedef struct
{
  Thread *f;
  PVOID param;
  int threadNum;
} THREAD_DATA;

class Thread
{
protected:
  // Virtual function that is called when the thread is started.
  // The parameter is the pointer that is passed first to the go() function
  virtual int action(PVOID param) = 0;

  // constructor for main thread class
  Thread();

  // constructor for children.
  Thread(int threadNum, const Thread *parent);
  virtual ~Thread();

  void go(PVOID param, int num); // creates all threads

  int getNumThreads() const { return m_numThreads; }

  // Virtual function to construct a new class.
  // the following comment has the implementation
  // return new class(threadNum, this);
  virtual Thread *newThread(int threadNum) = 0;

  // set the return value of the thread, probably not needed
  void setRetVal(int rc);

protected:
  int getThreadNum() const { return m_threadNum; }
  int Read(PVOID buf, int size, int timeout = 60);
  int Write(PVOID buf, int size, int timeout = 60);

protected:
  FILE_TYPE m_read;
  FILE_TYPE m_write;
private:

  int m_threadNum;

#ifndef NON_UNIX
  pollfd m_readPoll;
  pollfd m_writePoll;
  pthread_t *m_thread_info;
#endif
  FILE_TYPE m_parentRead;
  FILE_TYPE m_parentWrite;
  FILE_TYPE m_childRead;
  FILE_TYPE m_childWrite;
  int m_numThreads;
  int *m_retVal;

  Thread(const Thread &f);
  Thread & operator =(const Thread &f);


#ifdef NON_UNIX
#ifdef OS2
friend VOID APIENTRY thread_func(ULONG param);
#else
friend void( __cdecl thread_func )( void *param);
#endif
#else
friend PVOID thread_func(PVOID param);
#endif
};

#endif