#ifndef WRAPPER_H_
#define WRAPPER_H_

// ---- Class for "wrapper" program for calling object's run() -------

// The point of this class is to have a way of passing an object's
//   run() member function to pthread_create.
// Example use:  
//   If threadObj is a class that has
//       typedef threadObj * ptr
//     and a member function
//       void run(void)
//     and you have declarations
//       thread_t theThread;
//       threadObj theThreadObj(....);
//   you can call pthread_create thus:
//     pthread_create(&theThread, NULL,
//                    threadWrapper<threadObj::ptr>::run,
//                    (void *) &theThreadObj);
// See other sample programs for more examples of use.

template <typename ThreadObjPtrType>
class threadWrapper {
public:

  // Static (i.e., no current object needed) function to invoke
  //   the run() method of object theThreadObj.
  // Intended to be passed to pthread_create along with a pointer
  //   to theThreadObj; pthread_create then invokes the code
  //   below, with threadArg pointing to theThreadObj.
  static void * run(void * threadArg) {
    ThreadObjPtrType objPtr = (ThreadObjPtrType) threadArg;
    objPtr->run();
    return NULL;
  }
};

#endif // WRAPPER_H_