utility.h
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	/*
	============================================================================
	Filename : utility.h
	Author : Arash Pourhabibi
	============================================================================
	*/

	#include <omp.h>
	#include <time.h>
	#include <sys/time.h>

	struct timeval start, end;

	typedef struct rand_gen {
	unsigned short * seed;
	double (*rand_func) (struct rand_gen);

	} rand_gen;

	void set_clock(){
	gettimeofday(&start, NULL);
	}

	double elapsed_time(){
	gettimeofday(&end, NULL);

	double elapsed = (end.tv_sec - start.tv_sec);
	elapsed += (double)(end.tv_usec - start.tv_usec) / 1000000.0;
	return elapsed;
	}

	// Gives a random number between 0 and 1
	double next_rand(rand_gen gen){
	return erand48(gen.seed);
	}

	rand_gen init_rand(){
	unsigned short * seed_array = malloc (sizeof (unsigned short) * 3);
	seed_array[0] = 5;
	seed_array[1] = 10;
	seed_array[2] = omp_get_thread_num();

	rand_gen gen;
	gen.seed = seed_array;
	gen.rand_func = next_rand;

	return gen;
	}

	void free_rand(rand_gen gen){
	free(gen.seed);
	}