//
// "$Id: threads.cpp,v 1.4 2007/11/09 15:10:46 beku Exp $"
//
// Simple threading API for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2004 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//

// Inline classes to provide portable support for threads and mutexes.
//
// FLTK does not use this (it has an internal mutex implementation
// that is used if Fl::lock() is called). This header file's only
// purpose is so we can write portable demo programs. It may be useful
// or an inspiration to people who want to try writing multithreaded
// programs themselves.
//
// FLTK has no multithreaded support unless the main thread calls Fl::lock().
// This main thread is the only thread allowed to call Fl::run() or Fl::wait().
// From then on FLTK will be locked except when the main thread is actually
// waiting for events from the user. Other threads must call Fl::lock() and
// Fl::unlock() to surround calls to FLTK (such as to change widgets or
// redraw them).

#include "threads.h"
#include <iostream>
#  if HAVE_PTHREAD_H
// Use POSIX threading...

int fl_create_thread(Fl_Thread& t, void *(*f) (void *), void* p)
{
  pthread_attr_t tattr;
  int ret;

  size_t size = 0;

  /* initialized with default attributes */
  ret = pthread_attr_init( &tattr );

  /* reading the size of the stack */
  //ret = pthread_attr_setstacksize(&tattr, size);
#ifdef DEBUG
  ret = pthread_attr_getstacksize( &tattr,  &size );

  /* setting the size of the stack also */
  if(size > PTHREAD_STACK_MIN)
    size = PTHREAD_STACK_MIN + /*size +*/ 0x800000;
  std::cout<<"neue Stackgroesse: "<< PTHREAD_STACK_MIN <<" "<< 0x800000 <<" ";
  ret = pthread_attr_setstacksize(&tattr, size);
#endif

  /* only size specified in tattr*/
  ret = pthread_create((pthread_t*)&t, &tattr, f, p); 

#ifdef DEBUG
  void *base = NULL; size = 0;
  ret = pthread_attr_getstack (&tattr, &base, &size); 
  std::cout<<"Startpos: "<< base <<" size: "<< size << std::endl;
#endif

  ret = pthread_attr_destroy(&tattr);

  return ret;
}

#  elif defined(WIN32) && !defined(__WATCOMC__) // Use Windows threading...

int fl_create_thread(Fl_Thread& t, void *(*f) (void *), void* p) {
  t = (Fl_Thread)_beginthread((void( __cdecl * )( void * ))f, 0, p);
  if( t )
    return 0;
  else
    return 1;
}

#  elif defined(__WATCOMC__)

int fl_create_thread(Fl_Thread& t, void *(*f) (void *), void* p) {
  return t = (Fl_Thread)_beginthread((void(* )( void * ))f, 32000, p);
}
#  endif // !HAVE_PTHREAD_H

//
// End of "$Id: threads.cpp,v 1.4 2007/11/09 15:10:46 beku Exp $".
//
