#include <stdio.h>
#include <pthread.h>

pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t c = PTHREAD_COND_INITIALIZER;
volatile int p;

int left[5], avail[5], wakes;

void *tf(void *arg)
{
	int i = (long)arg;
	pthread_mutex_lock(&m);
	while (left[i]) {
		while (!avail[i]) pthread_cond_wait(&c, &m), wakes++;
		left[i]--; avail[i]--;
	}
	pthread_mutex_unlock(&m);
}

int main()
{
	pthread_t td[5];
	int i, total;
	pthread_mutexattr_t ma;
	pthread_mutexattr_init(&ma);
	pthread_mutexattr_settype(&ma, PTHREAD_MUTEX_ERRORCHECK);
	pthread_condattr_t ca;
	pthread_condattr_init(&ca);
	pthread_condattr_setpshared(&ca, PTHREAD_PROCESS_SHARED);
	//pthread_cond_init(&c, &ca);
	//pthread_mutex_init(&m, &ma);
	for (i=0; i<5; i++) left[i] = 100000;
	for (i=0; i<5; i++) pthread_create(td+i, 0, tf, (void*)(long)i);
	pthread_mutex_lock(&m);
	for (;;) {
		for (total=i=0; i<5; i++) total+=left[i];
		if (!total) break;
		for (i=0; i<5; i++) avail[i]=1;
		pthread_cond_broadcast(&c);
		pthread_mutex_unlock(&m);
		pthread_mutex_lock(&m);
	}
	pthread_mutex_unlock(&m);
	for (i=0; i<5; i++) pthread_join(td[i], 0);
	printf("%d\n", wakes);
}