/* source.cpp */


/* includes */

#include "vxWorks.h"
#include "stdio.h"
#include "stdlib.h"
#include "semLib.h"
#include "taskLib.h"
#include "assert.h"
#include "sched.h"
#include "kernelLib.h"

#define STACK_SIZE 20000

int tidTask1;			/* Task IDs */
int tidTask2;
int tidProgStop;

#define START 1
#define STOP 2

volatile UINT8 runState1;	
volatile UINT8 runState2;

SEM_ID stopSemId;
SEM_ID mutexSemId;		

/* forward declarations */

void task1 (void);
void task2 (void);
void increment (int num);
void progStop(void);
STATUS progStart (void);

static int amount = 0;

/*************************************************************************
*
* progStart - start the sample program.
*
* Create various semaphores and spawn various tasks, while doing
* incredibly little error checking.
*
* RETURNS: OK
*/

STATUS progStart (void) {

	/* setup semaphores */    
	stopSemId = semCCreate(SEM_Q_FIFO, 0);
	mutexSemId = semBCreate(SEM_Q_FIFO, SEM_FULL);
    
	/* get started */

	runState1 = START;
	runState2 = START;

	kernelTimeSlice(100);

	amount = 0;

	tidTask1 = taskSpawn ("task1", 1, 0, STACK_SIZE,
	        (FUNCPTR) task1,0,0,0,0,0,0,0,0,0,0);

	tidTask2 = taskSpawn ("task2", 1, 0, STACK_SIZE,
 	       (FUNCPTR) task2,0,0,0,0,0,0,0,0,0,0);

	tidProgStop = taskSpawn ("progStop", 200, 0, STACK_SIZE,
 	       (FUNCPTR) progStop,0,0,0,0,0,0,0,0,0,0);	

	return (OK);
}



void task1() {

	for (long int i=0; i < 10000; i++)
		increment(1);

	semGive(stopSemId);
}


void task2() {

	for (long int i=0; i < 10000; i++)
		increment(1);

	semGive(stopSemId);
}

void increment (int num) {
	
	amount = amount + num;
}

/*************************************************************************
*
* progStop - stops the program 
*
* Call this routine to end it all.
*/

void progStop (void)    {

	// wait for both tasks to finish
	semTake(stopSemId, WAIT_FOREVER);
	semTake(stopSemId, WAIT_FOREVER);

	printf("Amount = %d\n", amount);
    
	/* clean up */
 	semDelete (stopSemId);
 	semDelete (mutexSemId);
    
	printf ("BYE!TSCHUESS!ADIEU!\n");
}