// join-example.cc 
//	Example of using Thread::Join().

#include "copyright.h"
#include "system.h"
#include "synch.h"

int testnum = 1;

void
Joiner(Thread *joinee)
{
  currentThread->Yield();
  currentThread->Yield();

  printf("Waiting for the Joinee to finish executing.\n");

  currentThread->Yield();
  currentThread->Yield();

  // Note that, in this program, the "joinee" has not finished
  // when the "joiner" calls Join().  You will also need to handle
  // and test for the case when the "joinee" _has_ finished when
  // the "joiner" calls Join().

  joinee->Join();

  currentThread->Yield();
  currentThread->Yield();

  printf("Joinee has finished executing, we can continue.\n");

  currentThread->Yield();
  currentThread->Yield();
}

void
Joinee()
{
  int i;

  for (i = 0; i < 5; i++) {
    printf("Smell the roses.\n");
    currentThread->Yield();
  }

  currentThread->Yield();
  printf("Done smelling the roses!\n");
  currentThread->Yield();
}

void
ForkerThread()
{
  Thread *joiner = new Thread("joiner", 0);  // will not be joined
  Thread *joinee = new Thread("joinee", 1);  // WILL be joined

  // fork off the two threads and let them do their business
  joiner->Fork((VoidFunctionPtr) Joiner, (int) joinee);
  joinee->Fork((VoidFunctionPtr) Joinee, 0);

  // this thread is done and can go on its merry way
  printf("Forked off the joiner and joiner threads.\n");
}


//----------------------------------------------------------------------
// ThreadTest
// Invoke a test routine.
//----------------------------------------------------------------------

void
ThreadTest()
{
  switch (testnum) {
  case 1:
    ForkerThread();
    break;
  default:
    printf("No test specified.\n");
    break;
  }
}