/*
 * simplethreads.c
 *
 *  Created on: Sep 24, 2018
 *      Author: cs3841
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pthread.h>
#include <stdbool.h>

void* thread1_main(void*);

static long count = 0;
static bool is_locked = false;
static int whose_turn = 1;

int main(int argc, char* argv[]) {

	void * arg = NULL;
	pthread_t thread1;
	pthread_attr_t * attr = NULL;
	pthread_create(&thread1, attr, &thread1_main, arg);

	for(int i = 0; i < 10; i++){
		printf("In main thread: %d\n",i);
		for(int j = 0; j < 10000000; j++) {
			// Thread 1
			while(whose_turn == 2) {
				/* do nothing */
			}
			whose_turn = 1;
			// begin critical section
			count++;
			// end critical section
			whose_turn = 2;
		}
	}
	pthread_join(thread1, NULL);
	printf("count: %d\n",count);
	printf("success\n");
	return 0;
}

void* thread1_main(void * arg) {
	printf("Here we are!\n");
	for(int i = 0; i < 10; i++){
		printf("In thread1: %d\n",i);
		for(int j = 0; j < 10000000; j++) {
			// Thread 2
			while(whose_turn == 1) {
				/* do nothing */
			}
			whose_turn = 2;
			// begin critical section
			count++;
			// end critical section
			whose_turn = 1;
		}
	}
	return NULL;
}