/****************************************************************************
 *																			*
 * Arquivo EstudoDirigidoX.c criado por Gabriel Barbosa (12/0050935)		*
 * DESCRICAO DO PROBLEMA													*
 * Codigo multiplataforma													*
 * Usar flags -std=c11 -lpthread para compilar para Windows					*
 * Usar flags -std=c11 -pthread para compilar para Linux					*
 *																			*
****************************************************************************/

#ifdef _WIN32
	#include <windows.h>
	
	#define SLEEP(ms) Sleep(ms)
#else
	#define _BSD_SOURCE
	#include <unistd.h>

	#define SLEEP(ms) usleep( 1000*(ms) )
#endif

#define RAND_INTERVAL(min, max) ( rand()%( (max) - (min) ) + (min) )
#define RAND_INTERVAL2(mid, rng) ( rand()%( 2 * (rng) ) + (mid) - (rng) )

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <semaphore.h>
#include <time.h>


#define MIN_WAIT 3750 // Tempo minimo em ms
#define MAX_WAIT 6250 // Tempo maximo em ms

#define N_THREADS 10

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
pthread_barrier_t barrier;
sem_t semaphore;
int count = 0;

void* thread0_main( void* arg );


int main( int argc, char* argv[] ) {
	pthread_t thread[N_THREADS];
	
	pthread_barrier_init( &barrier, NULL, 2 );
	sem_init( &semaphore, 0, 1 );

	srand( time(NULL) );

	int* arg;
	for( int i = 0; i < N_THREADS; i++ ) {
		arg = (int*) malloc( sizeof(int) );
		*arg = rand();
		pthread_create( thread+i, NULL, thread0_main, arg );
	}

	pthread_join( thread[0], NULL );

	return 0;
}


void* thread0_main( void* arg ) {
	int myArg = *((int*)arg);
	free( arg );

	srand( myArg );
	
	SLEEP( RAND_INTERVAL( MIN_WAIT, MAX_WAIT ) );

	pthread_exit(0);
}